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de Villedon de Naide V, Maes JD, Villegas-Martinez M, Ribal I, Maillot A, Ozenne V, Montier G, Boullé T, Sridi S, Gut P, Küstner T, Stuber M, Cochet H, Bustin A. Fully automated contrast selection of joint bright- and black-blood late gadolinium enhancement imaging for robust myocardial scar assessment. Magn Reson Imaging 2024; 109:256-263. [PMID: 38522623 DOI: 10.1016/j.mri.2024.03.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 03/14/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
PURPOSE Joint bright- and black-blood MRI techniques provide improved scar localization and contrast. Black-blood contrast is obtained after the visual selection of an optimal inversion time (TI) which often results in uncertainties, inter- and intra-observer variability and increased workload. In this work, we propose an artificial intelligence-based algorithm to enable fully automated TI selection and simplify myocardial scar imaging. METHODS The proposed algorithm first localizes the left ventricle using a U-Net architecture. The localized left cavity centroid is extracted and a squared region of interest ("focus box") is created around the resulting pixel. The focus box is then propagated on each image and the sum of the pixel intensity inside is computed. The smallest sum corresponds to the image with the lowest intensity signal within the blood pool and healthy myocardium, which will provide an ideal scar-to-blood contrast. The image's corresponding TI is considered optimal. The U-Net was trained to segment the epicardium in 177 patients with binary cross-entropy loss. The algorithm was validated retrospectively in 152 patients, and the agreement between the algorithm and two magnetic resonance (MR) operators' prediction of TI values was calculated using the Fleiss' kappa coefficient. Thirty focus box sizes, ranging from 2.3mm2 to 20.3cm2, were tested. Processing times were measured. RESULTS The U-Net's Dice score was 93.0 ± 0.1%. The proposed algorithm extracted TI values in 2.7 ± 0.1 s per patient (vs. 16.0 ± 8.5 s for the operator). An agreement between the algorithm's prediction and the MR operators' prediction was found in 137/152 patients (κ= 0.89), for an optimal focus box of size 2.3cm2. CONCLUSION The proposed fully-automated algorithm has potential of reducing uncertainties, variability, and workload inherent to manual approaches with promise for future clinical implementation for joint bright- and black-blood MRI.
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Affiliation(s)
| | - Jean-David Maes
- CHU de Bordeaux, Department of Cardiovascular Imaging, INSERM, U 1045, F-33000 Bordeaux, France
| | | | - Indra Ribal
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France
| | - Aurélien Maillot
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France
| | - Valéry Ozenne
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France
| | - Géraldine Montier
- CHU de Bordeaux, Department of Cardiovascular Imaging, INSERM, U 1045, F-33000 Bordeaux, France
| | - Thibaut Boullé
- CHU de Bordeaux, Department of Cardiovascular Imaging, INSERM, U 1045, F-33000 Bordeaux, France
| | - Soumaya Sridi
- CHU de Bordeaux, Department of Cardiovascular Imaging, INSERM, U 1045, F-33000 Bordeaux, France
| | - Pauline Gut
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France; Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Thomas Küstner
- Medical Image and Data Analysis (MIDAS.lab), Department of Diagnostic and Interventional Radiology, University Hospital of Tübingen, 72076 Tübingen, Germany
| | - Matthias Stuber
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France; Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland; Center for Biomedical Imaging (CIBM), Lausanne, Switzerland
| | - Hubert Cochet
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France; CHU de Bordeaux, Department of Cardiovascular Imaging, INSERM, U 1045, F-33000 Bordeaux, France
| | - Aurélien Bustin
- Université de Bordeaux, INSERM, CRCTB, U 1045, IHU Liryc, F-33000 Bordeaux, France; CHU de Bordeaux, Department of Cardiovascular Imaging, INSERM, U 1045, F-33000 Bordeaux, France; Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
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Bober RM, Milani RV, Kachur SM, Morin DP. Assessment of resting myocardial blood flow in regions of known transmural scar to confirm accuracy and precision of 3D cardiac positron emission tomography. EJNMMI Res 2023; 13:87. [PMID: 37752344 PMCID: PMC10522549 DOI: 10.1186/s13550-023-01037-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 09/20/2023] [Indexed: 09/28/2023] Open
Abstract
BACKGROUND Composite invasive and non-invasive data consistently demonstrate that resting myocardial blood flow (rMBF) in regions of known transmural myocardial scar (TMS) converge on a value of ~ 0.30 mL/min/g or lower. This value has been confirmed using the 3 most common myocardial perfusion agents (13N, 15O-H2O and 82Rb) incorporating various kinetic models on older 2D positron emission tomography (PET) systems. Thus, rMBF in regions of TMS can serve as a reference "truth" to evaluate low-end accuracy of various PET systems and software packages (SWPs). Using 82Rb on a contemporary 3D-PET-CT system, we sought to determine whether currently available SWP can accurately and precisely measure rMBF in regions of known TMS. RESULTS Median rMBF (in mL/min/g) and COV in regions of TMS were 0.71 [IQR 0.52-1.02] and 0.16 with 4DM; 0.41 [0.34-0.54] and 0.10 with 4DM-FVD; 0.66 [0.51-0.85] and 0.11 with Cedars; 0.51 [0.43-0.61] and 0.08 with Emory-Votaw; 0.37 [0.30-0.42], 0.07 with Emory-Ottawa, and 0.26 [0.23-0.32], COV 0.07 with HeartSee. CONCLUSIONS SWPs varied widely in low end accuracy based on measurement of rMBF in regions of known TMS. 3D PET using 82Rb and HeartSee software accurately (0.26 mL/min/g, consistent with established values) and precisely (COV = 0.07) quantified rMBF in regions of TMS. The Emory-Ottawa software yielded the next-best accuracy (0.37 mL/min/g), though rMBF was higher than established gold-standard values in ~ 5% of the resting scans. 4DM, 4DM-FDV, Cedars and Emory-Votaw SWP consistently resulted values higher than the established gold standard (0.71, 0.41, 0.66, 0.51 mL/min/g, respectively), with higher interscan variability (0.16, 0.11, 0.11, and 0.09, respectively). TRIAL REGISTRATION clinicaltrial.gov, NCT05286593, Registered December 28, 2021, https://clinicaltrials.gov/ct2/show/NCT05286593 .
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Affiliation(s)
- Robert M Bober
- Department of Cardiovascular Diseases, John Ochsner Heart and Vascular Institute, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA, 70121-2483, USA.
- Ochsner Clinical School, Queensland University School of Medicine, New Orleans, LA, USA.
| | - Richard V Milani
- Department of Cardiovascular Diseases, John Ochsner Heart and Vascular Institute, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA, 70121-2483, USA
- Ochsner Clinical School, Queensland University School of Medicine, New Orleans, LA, USA
| | - Sergey M Kachur
- Department of Cardiovascular Diseases, John Ochsner Heart and Vascular Institute, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA, 70121-2483, USA
| | - Daniel P Morin
- Department of Cardiovascular Diseases, John Ochsner Heart and Vascular Institute, Ochsner Health, 1514 Jefferson Highway, New Orleans, LA, 70121-2483, USA
- Ochsner Clinical School, Queensland University School of Medicine, New Orleans, LA, USA
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3
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Bhatt A, Bates MJ, Marcu CB, Matheny RG, Carabello BA, Yin K, Boyd WD. Second-generation extracellular matrix patch for epicardial infarct repair. J Cardiothorac Surg 2023; 18:255. [PMID: 37658440 PMCID: PMC10474747 DOI: 10.1186/s13019-023-02358-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 08/27/2023] [Indexed: 09/03/2023] Open
Abstract
Current myocardial infarction treatments focus on improving hemodynamics rather than addressing the problem of lost myocardium impairing left ventricular function. Epicardial infarct repair with a bioactive patch placed on the ischemic area is an emerging approach to promote endogenous myocardial repair. We report the use of a second-generation CorMatrix-extracellular matrix (ECM) patch as an adjunct to surgical revascularization in treating a young patient with diffuse, multivessel coronary artery disease unamenable to PCI and a large anterior myocardial infarction. The progressive myocardial scar shrinkage and increase in left ventricular ejection fraction from 10 to 51% are generally not observed with surgical revascularization therapy alone, suggesting this new patch has adjunctive potential to current revascularization therapy.
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Affiliation(s)
- Arjun Bhatt
- Department of Cardiovascular Sciences, Brody School of Medicine, East Carolina University, 115 Heart Drive, Greenville, NC, 27834, USA
| | - Michael J Bates
- Department of Cardiovascular Sciences, Brody School of Medicine, East Carolina University, 115 Heart Drive, Greenville, NC, 27834, USA
| | - Constantin B Marcu
- Department of Cardiovascular Sciences, Brody School of Medicine, East Carolina University, 115 Heart Drive, Greenville, NC, 27834, USA
| | | | - Blase A Carabello
- Department of Cardiovascular Sciences, Brody School of Medicine, East Carolina University, 115 Heart Drive, Greenville, NC, 27834, USA
| | - Kanhua Yin
- Department of Cardiovascular Sciences, Brody School of Medicine, East Carolina University, 115 Heart Drive, Greenville, NC, 27834, USA.
| | - Walter Douglas Boyd
- Department of Cardiovascular Sciences, Brody School of Medicine, East Carolina University, 115 Heart Drive, Greenville, NC, 27834, USA
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Øvrebotten T, Heck S, Skjørten I, Einvik G, Stavem K, Ingul CB, Omland T, Myhre PL. Minor Myocardial Scars in Association with Cardiopulmonary Function after COVID-19. Cardiology 2023; 148:300-306. [PMID: 37231850 PMCID: PMC10614250 DOI: 10.1159/000530942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 04/11/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND Myocardial scars detected by cardiovascular magnetic resonance (CMR) imaging after COVID-19 have caused concerns regarding potential long-term cardiovascular consequences. OBJECTIVE The objective of this study was to investigate cardiopulmonary functioning in patients with versus without COVID-19-related myocardial scars. METHODS In this prospective cohort study, CMR was performed approximately 6 months after moderate-to-severe COVID-19. Before (∼3 months post-COVID-19) and after (∼12 months post-COVID-19) the CMR, patients underwent extensive cardiopulmonary testing with cardiopulmonary exercise tests, 24-h ECG, and echocardiography. We excluded participants with overt heart failure. RESULTS Post-COVID-19 CMR was available in 49 patients with cardiopulmonary tests at 3 and 12 months after the index hospitalization. Nine (18%) patients had small late gadolinium enhancement-detected myocardial scars. Patients with myocardial scars were older (63.2 ± 13.2 vs. 56.2 ± 13.2 years) and more frequently men (89% vs. 55%) compared to those without scars. Cardiorespiratory fitness was similar in patients with and without scars, i.e., peak oxygen uptake: 82.1 ± 11.5% versus 76.3 ± 22.5% of predicted, respectively (p = 0.46). The prevalence of ventricular premature contractions and arrhythmias was low and not different by the presence of myocardial scar. Cardiac structure and function assessed by echocardiography were similar between the groups, except for a tendency of greater left ventricular mass in those with scars (75 ± 20 vs. 62 ± 14, p = 0.02 and p = 0.08 after adjusting for age and sex). There were no significant associations between myocardial scar and longitudinal changes in cardiopulmonary function from 3 to 12 months. CONCLUSION Our findings imply that the presence of minor myocardial scars has limited clinical significance with respect to cardiopulmonary function after COVID-19.
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Affiliation(s)
- Tarjei Øvrebotten
- Division of Medicine, Department of Cardiology, Akershus University Hospital, Lørenskog, Norway,
- K.G. Jebsen Center for Cardiac Biomarkers, Institute for Clinical Medicine, University of Oslo, Oslo, Norway,
| | - Siri Heck
- K.G. Jebsen Center for Cardiac Biomarkers, Institute for Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Diagnostic Imaging, Akershus University Hospital, Lørenskog, Norway
| | - Ingunn Skjørten
- Department of Respiratory Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Gunnar Einvik
- Pulmonary Department, Akershus University Hospital, Lørenskog, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Knut Stavem
- Pulmonary Department, Akershus University Hospital, Lørenskog, Norway
- Institute for Clinical Medicine, University of Oslo, Oslo, Norway
- Health Services Research Unit, Akershus University Hospital, Lørenskog, Norway
| | - Charlotte B Ingul
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway
| | - Torbjørn Omland
- Division of Medicine, Department of Cardiology, Akershus University Hospital, Lørenskog, Norway
- K.G. Jebsen Center for Cardiac Biomarkers, Institute for Clinical Medicine, University of Oslo, Oslo, Norway
| | - Peder L Myhre
- Division of Medicine, Department of Cardiology, Akershus University Hospital, Lørenskog, Norway
- K.G. Jebsen Center for Cardiac Biomarkers, Institute for Clinical Medicine, University of Oslo, Oslo, Norway
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5
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Grilo GA, Cakir SN, Shaver PR, Iyer RP, Whitehead K, McClung JM, Vahdati A, de Castro Brás LE. Collagen matricryptin promotes cardiac function by mediating scar formation. Life Sci 2023; 321:121598. [PMID: 36963720 PMCID: PMC10120348 DOI: 10.1016/j.lfs.2023.121598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/07/2023] [Accepted: 03/15/2023] [Indexed: 03/26/2023]
Abstract
AIMS A peptide mimetic of a collagen-derived matricryptin (p1159) was shown to reduce left ventricular (LV) dilation and fibrosis after 7 days delivery in a mouse model of myocardial infarction (MI). This suggested p1159 long-term treatment post-MI could have beneficial effects and reduce/prevent adverse LV remodeling. This study aimed to test the potential of p1159 to reduce adverse cardiac remodeling in a chronic MI model and to elucidate p1159 mode-of-action. MATERIALS AND METHODS Using a permanent occlusion MI rodent model, animals received p1159 or vehicle solution up to 28 days. We assessed peptide treatment effects on scar composition and structure and on systolic function. To assess peptide effects on scar vascularization, a cohort of mice were injected with Griffonia simplicifolia isolectin-B4. To investigate p1159 mode-of-action, LV fibroblasts from naïve animals were treated with increasing doses of p1159. KEY FINDINGS Matricryptin p1159 significantly improved systolic function post-MI (2-fold greater EF compared to controls) by reducing left ventricular dilation and inducing the formation of a compliant and organized infarct scar, which promoted LV contractility and preserved the structural integrity of the heart. Specifically, infarcted scars from p1159-treated animals displayed collagen fibers aligned parallel to the epicardium, to resist circumferential stretching, with reduced levels of cross-linking, and improved tissue perfusion. In addition, we found that p1159 increases cardiac fibroblast migration by activating RhoA pathways via the membrane receptor integrin α4. SIGNIFICANCE Our data indicate p1159 treatment reduced adverse LV remodeling post-MI by modulating the deposition, arrangement, and perfusion of the fibrotic scar.
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Affiliation(s)
- Gabriel A Grilo
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Sirin N Cakir
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Patti R Shaver
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Rugmani P Iyer
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Kaitlin Whitehead
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Joseph M McClung
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America; Department of Cardiovascular Sciences, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America; East Carolina Diabetes and Obesity Institute, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America
| | - Ali Vahdati
- Department of Engineering, East Carolina University, Greenville, NC 27858, United States of America
| | - Lisandra E de Castro Brás
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America; Department of Cardiovascular Sciences, The Brody School of Medicine, East Carolina University, Greenville, NC 27834, United States of America.
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Larsen CK, Galli E, Duchenne J, Aalen JM, Stokke C, Fjeld JG, Degtiarova G, Claus P, Gheysens O, Saberniak J, Sirnes PA, Lyseggen E, Bogaert J, Kongsgaard E, Penicka M, Voigt JU, Donal E, Hopp E, Smiseth OA. Scar imaging in the dyssynchronous left ventricle: Accuracy of myocardial metabolism by positron emission tomography and function by echocardiographic strain. Int J Cardiol 2023; 372:122-129. [PMID: 36460211 DOI: 10.1016/j.ijcard.2022.11.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/20/2022] [Accepted: 11/22/2022] [Indexed: 11/30/2022]
Abstract
PURPOSE Response to cardiac resynchronization therapy (CRT) is reduced in patients with high left ventricular (LV) scar burden, in particular when scar is located in the LV lateral wall or septum. Late gadolinium enhancement (LGE) cardiac magnetic resonance (CMR) can identity scar, but is not feasible in all patients. This study investigates if myocardial metabolism by 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) and contractile function by echocardiographic strain are alternatives to LGE-CMR. METHODS In a prospective multicenter study, 132 CRT candidates (91% with left bundle branch block) were studied by speckle tracking strain echocardiography, and 53 of these by FDG-PET. Regional myocardial FDG metabolism and peak systolic strain were compared to LGE-CMR as reference method. RESULTS Reduced FDG metabolism (<70% relative) precisely identified transmural scars (≥50% of myocardial volume) in the LV lateral wall, with area under the curve (AUC) 0.96 (95% confidence interval (CI) 0.90-1.00). Reduced contractile function by strain identified transmural scars in the LV lateral wall with only moderate accuracy (AUC = 0.77, CI 0.71-0.84). However, absolute peak systolic strain >10% could rule out transmural scar with high sensitivity (80%) and high negative predictive value (96%). Neither FDG-PET nor strain identified septal scars (for both, AUC < 0.80). CONCLUSIONS In CRT candidates, FDG-PET is an excellent alternative to LGE-CMR to identify scar in the LV lateral wall. Furthermore, preserved strain in the LV lateral wall has good accuracy to rule out transmural scar. None of the modalities can identify septal scar. CLINICAL TRIAL REGISTRATION The present study is part of the clinical study "Contractile Reserve in Dyssynchrony: A Novel Principle to Identify Candidates for Cardiac Resynchronization Therapy (CRID-CRT)", which was registered at clinicaltrials.gov (identifier NCT02525185).
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Affiliation(s)
- Camilla Kjellstad Larsen
- Institute for Surgical Research, Oslo University Hospital and University of Oslo, Oslo, Norway; Department of Cardiology, Oslo University Hospital, Oslo, Norway
| | - Elena Galli
- Department of Cardiology, University Hospital of Rennes and University of Rennes, Rennes, France
| | - Jürgen Duchenne
- Department of Cardiovascular Diseases, University Hospitals Leuven and Department of Cardiovascular Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - John M Aalen
- Institute for Surgical Research, Oslo University Hospital and University of Oslo, Oslo, Norway; Department of Cardiology, Oslo University Hospital, Oslo, Norway
| | - Caroline Stokke
- Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway; Department of Physics, University of Oslo, Oslo, Norway
| | - Jan Gunnar Fjeld
- Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway; Oslo Metropolitan University, Oslo, Norway
| | - Ganna Degtiarova
- Department of Nuclear Medicine, University Hospitals Leuven and Department of Imaging and Pathology, KU Leuven - University of Leuven, Leuven, Belgium
| | - Piet Claus
- Department of Nuclear Medicine, University Hospitals Leuven and Department of Imaging and Pathology, KU Leuven - University of Leuven, Leuven, Belgium
| | - Olivier Gheysens
- Department of Nuclear Medicine, Cliniques Universitaires Saint-Luc and Institute of Clinical and Experimental Research (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - Jorg Saberniak
- Department of Cardiology, Akershus University Hospital, Lorenskog, Norway
| | | | - Erik Lyseggen
- Department of Cardiology, Oslo University Hospital, Oslo, Norway
| | - Jan Bogaert
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - Erik Kongsgaard
- Department of Cardiology, Oslo University Hospital, Oslo, Norway
| | | | - Jens-Uwe Voigt
- Department of Cardiovascular Diseases, University Hospitals Leuven and Department of Cardiovascular Sciences, KU Leuven - University of Leuven, Leuven, Belgium
| | - Erwan Donal
- Department of Cardiology, University Hospital of Rennes and University of Rennes, Rennes, France
| | - Einar Hopp
- Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway
| | - Otto A Smiseth
- Institute for Surgical Research, Oslo University Hospital and University of Oslo, Oslo, Norway; Department of Cardiology, Oslo University Hospital, Oslo, Norway.
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Elliott MK, Strocchi M, Sieniewicz BJ, Sidhu B, Mehta V, Wijesuriya N, Behar JM, Thorpe A, Martic D, Wong T, Niederer S, Rinaldi CA. Biventricular endocardial pacing and left bundle branch area pacing for cardiac resynchronization: Mechanistic insights from electrocardiographic imaging, acute hemodynamic response, and magnetic resonance imaging. Heart Rhythm 2023; 20:207-216. [PMID: 36575808 DOI: 10.1016/j.hrthm.2022.10.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/13/2022] [Accepted: 10/21/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND Biventricular endocardial pacing (BiV-endo) has demonstrated superior cardiac resynchronization compared to conventional biventricular epicardial pacing (BiV-epi). Left bundle branch area pacing (LBBAP) may also achieve effective cardiac resynchronization therapy (CRT). OBJECTIVE The purpose of this study was to compare the acute electrical and hemodynamic effects of BiV-epi, BiV-endo, and LBBAP delivered from the LV endocardium and to assess how myocardial scar affects response. METHODS Eleven patients with heart failure and indications for CRT underwent a temporary pacing study with electrocardiographic imaging (ECGi) and hemodynamic assessment. BiV-endo was delivered by stimulation of the left ventricular (LV) lateral wall, and LBBAP was delivered by stimulation of the LV septum, at the site of a Purkinje potential. LV activation time (LVAT-95), LV dyssynchrony index (LVDI), biventricular activation time (BIVAT-90), and biventricular dyssynchrony index (BIVDI) were calculated. Myocardial scar was assessed using magnetic resonance imaging (MRI). RESULTS The protocol was completed in 10 patients. Compared to BiV-epi (LVAT-95: 79.2 ± 13.1 ms; LVDI: 26.6 ± 3.4 ms) LV resynchronization was superior during BiV-endo (LVAT-95: 48.5 ± 14.9 ms; P = .001; LVDI: 16.6 ± 6.4 ms; P = .002) and LBBAP (LVAT-95: 48.9 ± 12.5 ms; P = .001; LVDI: 15.3 ± 3.4 ms; P = .001). Biventricular resynchronization was similarly superior during BiV-endo and LBBAP vs BiV-epi (BIVAT-90 and BIVDI; P <.05). The rate of acute hemodynamic responders was higher during BiV-endo (90%) and LBBAP (70%) vs BiV-epi (50%). The benefits of LBBAP (but not BiV-endo) on LV resynchronization were attenuated when septal scar was present in a subset of 8 patients who underwent MRI. CONCLUSION Our findings suggest superior electrical resynchronization and a higher proportion of acute hemodynamic responders during BiV-endo and LBBAP compared to BiV-epi. Electrical resynchronization was similar between BiV-endo and LBBAP; however, septal scar seemed to attenuate response to LBBAP.
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Affiliation(s)
- Mark K Elliott
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom.
| | - Marina Strocchi
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Benjamin J Sieniewicz
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Baldeep Sidhu
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Vishal Mehta
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Nadeev Wijesuriya
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Jonathan M Behar
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Andrew Thorpe
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Dejana Martic
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Tom Wong
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom; National Heart and Lung Institute, Imperial College School of Medicine, London, United Kingdom
| | - Steven Niederer
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Christopher A Rinaldi
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom; Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
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Papachristidis A, Theodoropoulos KC, Marvaki A, Queirós S, D'hooge J, Masoero G, Pagnano G, Huang M, Dancy L, Sado D, Shah AM, Murgatroyd FD, Monaghan MJ. Power Modulation Echocardiography to Detect and Quantify Myocardial Scar. J Am Soc Echocardiogr 2022; 35:1146-55. [PMID: 35798123 DOI: 10.1016/j.echo.2022.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 05/28/2022] [Accepted: 06/05/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Myocardial scar correlates with clinical outcomes. Traditionally, late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) is used to detect and quantify scar. In this prospective study using LGE CMR as reference, the authors hypothesized that nonlinear ultrasound imaging, namely, power modulation, can detect and quantify myocardial scar in selected patients with previous myocardial infarction. In addition, given the different histopathology between ischemic and nonischemic scar, a further aim was to test the diagnostic performance of this echocardiographic technique in unselected consecutive individuals with ischemic and nonischemic LGE or no LGE on CMR. METHODS Seventy-one patients with previous myocardial infarction underwent power modulation echocardiography following CMR imaging (group A). Subsequently, 101 consecutive patients with or without LGE on CMR, including individuals with nonischemic LGE, were scanned using power modulation echocardiography (group B). RESULTS In group A, echocardiography detected myocardial scar in all 71 patients, with good scar volume agreement with CMR (bias = -1.9 cm3; limits of agreement [LOA], -8.0 to 4.2 cm3). On a per-segment basis, sensitivity was 82%, specificity 97%, and accuracy 92%. Sensitivity was higher in the inferior and posterior segments and lower in the anterior and lateral walls. In group B, on a per-subject basis, the sensitivity of echocardiography was 62% (91% for ischemic and 30% for nonischemic LGE), with specificity and accuracy of 89% and 72%, respectively. The bias for scar volume between modalities was 5.9 cm3, with LOA of 34.6 to 22.9 cm3 (bias = -1.9 cm3 [LOA, -11.4 to 7.6 cm3] for ischemic LGE, and bias = 18.9 cm3 [LOA, -67.4 to 29.7.6 cm3] for nonischemic LGE). CONCLUSIONS Power modulation echocardiography can detect myocardial scar in both selected and unselected individuals with previous myocardial infarction and has good agreement for scar volume quantification with CMR. In an unselected cohort with nonischemic LGE, sensitivity is low.
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9
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Elliott MK, Costa CM, Whitaker J, Gemmell P, Mehta VS, Sidhu BS, Gould J, Williams SE, O'Neill M, Razavi R, Niederer S, Bishop MJ, Rinaldi CA. Effect of scar and pacing location on repolarization in a porcine myocardial infarction model. Heart Rhythm O2 2022; 3:186-195. [PMID: 35496454 PMCID: PMC9043407 DOI: 10.1016/j.hroo.2022.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Background The effect of chronic ischemic scar on repolarization is unclear, with conflicting results from human and animal studies. An improved understanding of electrical remodeling within scar and border zone tissue may enhance substrate-guided ablation techniques for treatment of ventricular tachycardia. Computational modeling studies have suggested increased dispersion of repolarization during epicardial, but not endocardial, left ventricular pacing, in close proximity to scar. However, the effect of endocardial pacing near scar in vivo is unknown. Objective The purpose of this study was to investigate the effect of scar and pacing location on local repolarization in a porcine myocardial infarction model. Methods Six model pigs underwent late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) imaging followed by electroanatomic mapping of the left ventricular endocardium. LGE-CMR images were registered to the anatomic shell and scar defined by LGE. Activation recovery intervals (ARIs), a surrogate for action potential duration, and local ARI gradients were calculated from unipolar electrograms within areas of late gadolinium enhancement (aLGE) and healthy myocardium. Results There was no significant difference between aLGE and healthy myocardium in mean ARI (304.20 ± 19.44 ms vs 300.59 ± 19.22 ms; P = .43), ARI heterogeneity (23.32 ± 11.43 ms vs 24.85 ± 12.99 ms; P = .54), or ARI gradients (6.18 ± 2.09 vs 5.66 ± 2.32 ms/mm; P = .39). Endocardial pacing distance from scar did not affect ARI gradients. Conclusion Our findings suggest that changes in ARI are not an intrinsic property of surviving myocytes within scar, and endocardial pacing close to scar does not affect local repolarization.
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Affiliation(s)
- Mark K Elliott
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Caroline Mendonca Costa
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - John Whitaker
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Philip Gemmell
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Vishal S Mehta
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Baldeep S Sidhu
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Justin Gould
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Steven E Williams
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Mark O'Neill
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Reza Razavi
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Steven Niederer
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Martin J Bishop
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Christopher A Rinaldi
- School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
- Department of Cardiology, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
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10
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Gao Y, Xu HY, Guo YK, Wen XL, Shi R, Li Y, Yang ZG. Impact of myocardial scars on left ventricular deformation in type 2 diabetes mellitus after myocardial infarction by contrast-enhanced cardiac magnetic resonance. Cardiovasc Diabetol 2021; 20:215. [PMID: 34696783 PMCID: PMC8547068 DOI: 10.1186/s12933-021-01407-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 10/17/2021] [Indexed: 02/08/2023] Open
Abstract
Background Type 2 diabetes mellitus (T2DM) is a major risk factor for coronary artery disease and myocardial infarction (MI). The interaction of diabetic cardiomyopathy and MI scars on myocardial deformation in T2DM patients is unclear. Therefore, we aimed to evaluate myocardial deformation using cardiac magnetic resonance (CMR) in T2DM patients with previous MI and investigated the influence of myocardial scar on left ventricular (LV) deformation. Methods Overall, 202 T2DM patients, including 46 with MI (T2DM(MI+)) and 156 without MI (T2DM(MI−)), and 59 normal controls who underwent CMR scans were included. Myocardial scars were assessed by late gadolinium enhancement. LV function and deformation, including LV global function index, LV global peak strain (PS), peak systolic strain rate (PSSR), and peak diastolic strain rate (PDSR), were compared among these groups. Correlation and multivariate linear regression analyses were used to investigate the relationship between myocardial scars and LV deformation. Results Decreases were observed in LV function and LV global PS, PSSR, and PDSR in the T2DM(MI+) group compared with those of the other groups. Reduced LV deformation (p < 0.017) was observed in the T2DM(MI+) group with anterior wall infarction. The increased total LV infarct extent and infarct mass of LV were related to decreased LV global PS (radial, circumferential, and longitudinal directions; p < 0.01) and LV global PSSR (radial and circumferential directions, p < 0.02). Multivariate analysis demonstrated that NYHA functional class and total LV infarct extent were independently associated with LV global radial PS (β = − 0.400 and β = − 0.446, respectively, all p < 0.01; model R2 = 0.37) and circumferential PS (β = 0.339 and β = 0.530, respectively, all p < 0.01; model R2 = 0.41), LV anterior wall infarction was independently associated with LV global longitudinal PS (β = 0.398, p = 0.006). Conclusions The myocardial scarring size in T2DM patients after MI is negatively correlated with LV global PS and PSSR, particularly in the circumferential direction. Additionally, different MI regions have different effects on the reduction of LV deformation, and relevant clinical evaluations should be strengthened.
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Affiliation(s)
- Yue Gao
- Department of Radiology, West China Hospital, Sichuan University, 37# Guo Xue Xiang, Chengdu, 610041, Sichuan, China
| | - Hua-Yan Xu
- Department of Radiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Ying-Kun Guo
- Department of Radiology, Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Xiao-Ling Wen
- Department of Radiology, West China Fourth Hospital, Sichuan University, 18# Section 3, Renmin South Road, Chengdu, Sichuan Province, China
| | - Rui Shi
- Department of Radiology, West China Hospital, Sichuan University, 37# Guo Xue Xiang, Chengdu, 610041, Sichuan, China
| | - Yuan Li
- Department of Radiology, West China Hospital, Sichuan University, 37# Guo Xue Xiang, Chengdu, 610041, Sichuan, China.
| | - Zhi-Gang Yang
- Department of Radiology, West China Hospital, Sichuan University, 37# Guo Xue Xiang, Chengdu, 610041, Sichuan, China.
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11
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Dong Q, Wen X, Chang G, Xia R, Wang S, Yang Y, Tao Y, Zhang D, Qin S. ST-segment resolution as a marker for severe myocardial fibrosis in ST-segment elevation myocardial infarction. BMC Cardiovasc Disord 2021; 21:455. [PMID: 34548012 PMCID: PMC8454141 DOI: 10.1186/s12872-021-02269-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 09/14/2021] [Indexed: 11/29/2022] Open
Abstract
Objective To investigate the relationship between ST-segment resolution (STR) and myocardial scar thickness after percutaneous coronary intervention (PCI) in patients with ST-segment elevation myocardial infarction (STEMI). Methods Forty-two STEMI patients with single-branch coronary artery stenosis or occlusion were enrolled. ST-segment elevations were measured at emergency admission and at 24 h after PCI. Late gadolinium-enhanced cardiac magnetic resonance imaging (CMR-LGE) was performed 7 days after PCI to evaluate myocardial scars. Statistical analyses were performed to assess the utility of STR to predict the development of transmural (> 75%) or non-transmural (< 75%) myocardial scars, according to previous study. Results The sensitivity and specificity of STR for predicting transmural scars were 96% and 88%, respectively, at an STR cut-off value of 40.15%. The area under the curve was 0.925. Multivariate logistic proportional hazards regression analysis disclosed that patients with STR < 40.15% had a 170.90-fold higher probability of developing transmural scars compared with patients with STR ≥ 40.15%. Pearson correlation and linear regression analyses showed STR percentage was significantly associated with myocardial scar thickness and size. Conclusion STR < 40.15% at 24 h after PCI may provide meaningful diagnostic information regarding the extent of myocardial scarification in STEMI patients. Supplementary Information The online version contains supplementary material available at 10.1186/s12872-021-02269-y.
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Affiliation(s)
- Qian Dong
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China
| | - Xuesong Wen
- Chongqing Medical University, Yuzhong, Chongqing, China
| | - Guanglei Chang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China
| | - Rui Xia
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China
| | - Sihang Wang
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China
| | - Yunjing Yang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China
| | - Yi Tao
- Chongqing Medical University, Yuzhong, Chongqing, China
| | - Dongying Zhang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China.
| | - Shu Qin
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, China.
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12
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van Woerden G, van Veldhuisen DJ, Gorter TM, Willems TP, van Empel VPM, Peters A, Pundziute G, Op den Akker JW, Rienstra M, Westenbrink BD. The clinical and prognostic value of late Gadolinium enhancement imaging in heart failure with mid-range and preserved ejection fraction. Heart Vessels 2021. [PMID: 34292389 DOI: 10.1007/s00380-021-01910-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/16/2021] [Indexed: 12/05/2022]
Abstract
Heart failure (HF) with mid-range or preserved ejection fraction (HFmrEF; HFpEF) is a heterogeneous disorder that could benefit from strategies to identify subpopulations at increased risk. We tested the hypothesis that HFmrEF and HFpEF patients with myocardial scars detected with late gadolinium enhancement (LGE) are at increased risk for all-cause mortality. Symptomatic HF patients with left ventricular ejection fraction (LVEF) > 40%, who underwent cardiac magnetic resonance (CMR) imaging were included. The presence of myocardial LGE lesions was visually assessed. T1 mapping was performed to calculate extracellular volume (ECV). Multivariable logistic regression analyses were used to determine associations between clinical characteristics and LGE. Cox regression analyses were used to assess the association between LGE and all-cause mortality. A total of 110 consecutive patients were included (mean age 71 ± 10 years, 49% women, median N-terminal brain natriuretic peptide (NT-proBNP) 1259 pg/ml). LGE lesions were detected in 37 (34%) patients. Previous myocardial infarction and increased LV mass index were strong and independent predictors for the presence of LGE (odds ratio 6.32, 95% confidence interval (CI) 2.07–19.31, p = 0.001 and 1.68 (1.03–2.73), p = 0.04, respectively). ECV was increased in patients with LGE lesions compared to those without (28.6 vs. 26.6%, p = 0.04). The presence of LGE lesions was associated with a fivefold increase in the incidence of all-cause mortality (hazards ratio 5.3, CI 1.5–18.1, p = 0.009), independent of age, sex, New York Heart Association (NYHA) functional class, NT-proBNP, LGE mass and LVEF. Myocardial scarring on CMR is associated with increased mortality in HF patients with LVEF > 40% and may aid in selecting a subpopulation at increased risk.
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13
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Holtackers RJ, Van De Heyning CM, Chiribiri A, Wildberger JE, Botnar RM, Kooi ME. Dark-blood late gadolinium enhancement cardiovascular magnetic resonance for improved detection of subendocardial scar: a review of current techniques. J Cardiovasc Magn Reson 2021; 23:96. [PMID: 34289866 PMCID: PMC8296731 DOI: 10.1186/s12968-021-00777-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 05/17/2021] [Indexed: 12/02/2022] Open
Abstract
For almost 20 years, late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) has been the reference standard for the non-invasive assessment of myocardial viability. Since the blood pool often appears equally bright as the enhanced scar regions, detection of subendocardial scar patterns can be challenging. Various novel LGE methods have been proposed that null or suppress the blood signal by employing additional magnetization preparation mechanisms. This review aims to provide a comprehensive overview of these dark-blood LGE methods, discussing the magnetization preparation schemes and findings in phantom, preclinical, and clinical studies. Finally, conclusions on the current evidence and limitations are drawn and new avenues for future research are discussed. Dark-blood LGE methods are a promising new tool for non-invasive assessment of myocardial viability. For a mainstream adoption of dark-blood LGE, however, clinical availability and ease of use are crucial.
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Affiliation(s)
- Robert J. Holtackers
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, PO Box 616, Maastricht, 6200 MD The Netherlands
- Department of Radiology & Nuclear Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, United Kingdom
| | | | - Amedeo Chiribiri
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, United Kingdom
| | - Joachim E. Wildberger
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, PO Box 616, Maastricht, 6200 MD The Netherlands
- Department of Radiology & Nuclear Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - René M. Botnar
- School of Biomedical Engineering & Imaging Sciences, King’s College London, London, United Kingdom
- Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - M. Eline Kooi
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, PO Box 616, Maastricht, 6200 MD The Netherlands
- Department of Radiology & Nuclear Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands
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14
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Linhart M, Doltra A, Acosta J, Borràs R, Jáuregui B, Fernández-Armenta J, Anguera I, Bisbal F, Martí-Almor J, Tolosana JM, Penela D, Soto-Iglesias D, Villuendas R, Perea RJ, Ortiz JT, Bosch X, Auricchio A, Mont L, Berruezo A. Ventricular arrhythmia risk is associated with myocardial scar but not with response to cardiac resynchronization therapy. Europace 2021; 22:1391-1400. [PMID: 32898254 DOI: 10.1093/europace/euaa142] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Indexed: 12/25/2022] Open
Abstract
AIMS Sudden cardiac death (SCD) risk estimation in patients referred for cardiac resynchronization therapy (CRT) remains a challenge. By CRT-mediated improvement of left ventricular ejection fraction (LVEF), many patients loose indication for primary prevention implantable cardioverter-defibrillator (ICD). Increasing evidence shows the importance of myocardial scar for risk prediction. The aim of this study was to investigate the prognostic impact of myocardial scar depending on the echocardiographic response in patients undergoing CRT. METHODS AND RESULTS Patients with indication for CRT were prospectively enrolled. Decision about ICD or pacemaker implantation was based on clinical criteria. All patients underwent delayed-enhancement cardiac magnetic resonance imaging. Median follow-up duration was 45 (24-75) months. Primary outcome was a composite of sustained ventricular arrhythmia, appropriate ICD therapy, or SCD. A total of 218 patients with LVEF 25.5 ± 6.6% were analysed [158 (73%) male, 64.9 ± 10.7 years]. Myocardial scar was observed in 73 patients with ischaemic cardiomyopathy (ICM) (95% of ICM patients); in 62 with non-ischaemic cardiomyopathy (45% of these patients); and in all but 1 of 36 (17%) patients who reached the primary outcome. Myocardial scar was the only significant predictor of primary outcome [odds ratio 27.7 (3.8-202.7)], independent of echocardiographic CRT response. A total of 55 (25%) patients died from any cause or received heart transplant. For overall survival, only a combination of the absence of myocardial scar with CRT response was associated with favourable outcome. CONCLUSION Malignant arrhythmic events and SCD depend on the presence of myocardial scar but not on CRT response. All-cause mortality improved only with the combined absence of myocardial scar and CRT response.
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Affiliation(s)
- Markus Linhart
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
| | - Adelina Doltra
- Non-Invasive Cardiac Imaging Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
| | - Juan Acosta
- Unidad de Cardiología y Cirugía Cardiovascular, Hospital Universitario Virgen del Rocío, Av. Manuel Siurot, S/n, 41013 Sevilla, Spain.,CIBERCV, Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain
| | - Roger Borràs
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain.,CIBERCV, Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain
| | - Beatriz Jáuregui
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain.,Cardiology Department, Heart Institute, Teknon Medical Center, C/Vilana, 12, 08022 Barcelona, Spain
| | - Juan Fernández-Armenta
- CIBERCV, Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain.,Arrhythmia Unit, Cardiology Department, Hospital Universitario Puerta del Mar, Av. Ana de Viya, 21, 11009 Cádiz, Spain
| | - Ignasi Anguera
- Cardiology Department, Heart Disease Institute, Bellvitge Biomedical Research Institute IDIBELL, Bellvitge Hospital, University of Barcelona, Carrer de la Feixa Llarga, s/n, 08907 L'Hospitalet de Llobregat, Barcelona, Spain
| | - Felipe Bisbal
- Heart Institute (iCor), University Hospital Germans Trias i Pujol, Carretera de Canyet, s/n, 08916 Badalona, Barcelona, Spain
| | - Julio Martí-Almor
- Electrophysiology Unit, Cardiovascular Division, Department of Medicine, Hospital del Mar, Universitat Autònoma de Barcelona, Passeig Marítim 25-29, 08003 Barcelona, Spain
| | - Jose M Tolosana
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
| | - Diego Penela
- Cardiology Department, Ospedale Guglielmo da Saliceto, Via Taverna Giuseppe, 49, 29121 Piacenza, Italy
| | - David Soto-Iglesias
- Cardiology Department, Heart Institute, Teknon Medical Center, C/Vilana, 12, 08022 Barcelona, Spain
| | - Roger Villuendas
- CIBERCV, Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain.,Heart Institute (iCor), University Hospital Germans Trias i Pujol, Carretera de Canyet, s/n, 08916 Badalona, Barcelona, Spain
| | - Rosario J Perea
- Radiology Department, Hospital Clinic, University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
| | - Jose T Ortiz
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
| | - Xavier Bosch
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
| | - Angelo Auricchio
- Division of Cardiology, Fondazione Cardiocentro Ticino, Via Tesserete 48. CH-6900 Lugano, Switzerland
| | - Lluis Mont
- Arrhythmia Section, Cardiology Department, Thorax Institute, Hospital Clínic and IDIBAPS (Institut d'Investigació Agustí Pi i Sunyer), University of Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain.,CIBERCV, Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain
| | - Antonio Berruezo
- CIBERCV, Instituto de Salud Carlos III, Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain.,Cardiology Department, Heart Institute, Teknon Medical Center, C/Vilana, 12, 08022 Barcelona, Spain
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15
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Papachristidis A, Queirós S, Theodoropoulos KC, D'hooge J, Rafter P, Masoero G, Zidros S, Pagnano G, Huang M, Dancy L, Sado D, Shah AM, Murgatroyd FD, Monaghan MJ. The Impact of Vendor-Specific Ultrasound Beam-Forming and Processing Techniques on the Visualization of In Vitro Experimental "Scar": Implications for Myocardial Scar Imaging Using Two-Dimensional and Three-Dimensional Echocardiography. J Am Soc Echocardiogr 2021; 34:1095-1105.e6. [PMID: 34082020 DOI: 10.1016/j.echo.2021.05.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 05/16/2021] [Accepted: 05/17/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Myocardial scar appears brighter compared with normal myocardium on echocardiography because of differences in tissue characteristics. The aim of this study was to test how different ultrasound pulse characteristics affect the brightness contrast (i.e., contrast ratio [CR]) between tissues of different acoustic properties, as well as the accuracy of assessing tissue volume. METHODS An experimental in vitro "scar" model was created using overheated and raw pieces of commercially available bovine muscle. Two-dimensional and three-dimensional ultrasound scanning of the model was performed using combinations of ultrasound pulse characteristics: ultrasound frequency, harmonics, pulse amplitude, steady pulse (SP) emission, power modulation (PM), and pulse inversion modalities. RESULTS On both two-dimensional and three-dimensional imaging, the CR between the "scar" and its adjacent tissue was higher when PM was used. PM, as well as SP ultrasound imaging, provided good "scar" volume quantification. When tested on 10 "scars" of different size and shape, PM resulted in lower bias (-9.7 vs 54.2 mm3) and narrower limits of agreement (-168.6 to 149.2 mm3 vs -296.0 to 404.4 mm3, P = .03). The interobserver variability for "scar" volume was better with PM (intraclass correlation coefficient = 0.901 vs 0.815). Two-dimensional and three-dimensional echocardiography with PM and SP was performed on 15 individuals with myocardial scar secondary to infarction. The CR was higher on PM imaging. Using cardiac magnetic resonance as a reference, quantification of myocardial scar volume showed better agreement when PM was used (bias, -645 mm3; limits of agreement, -3,158 to 1,868 mm3) as opposed to SP (bias, -1,138 mm3; limits of agreement, -5,510 to 3,233 mm3). CONCLUSIONS The PM modality increased the CR between tissues with different acoustic properties in an experimental in vitro "scar" model while allowing accurate quantification of "scar" volume. By applying the in vitro findings to humans, PM resulted in higher CR between scarred and healthy myocardium, providing better scar volume quantification than SP compared with cardiac magnetic resonance.
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Affiliation(s)
- Alexandros Papachristidis
- Cardiology Department, King's College Hospital, London, United Kingdom; King's College London, British Heart Foundation Centre, London, United Kingdom.
| | - Sandro Queirós
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal; Lab on Cardiovascular Imaging and Dynamics, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | | | - Jan D'hooge
- Lab on Cardiovascular Imaging and Dynamics, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | | | - Giovanni Masoero
- Cardiology Department, King's College Hospital, London, United Kingdom
| | - Spyridon Zidros
- Cardiology Department, King's College Hospital, London, United Kingdom
| | - Gianpiero Pagnano
- Cardiology Department, King's College Hospital, London, United Kingdom
| | - Marilou Huang
- Cardiology Department, King's College Hospital, London, United Kingdom
| | - Luke Dancy
- Cardiology Department, King's College Hospital, London, United Kingdom; King's College London, British Heart Foundation Centre, London, United Kingdom
| | - Daniel Sado
- Cardiology Department, King's College Hospital, London, United Kingdom; King's College London, British Heart Foundation Centre, London, United Kingdom
| | - Ajay M Shah
- Cardiology Department, King's College Hospital, London, United Kingdom; King's College London, British Heart Foundation Centre, London, United Kingdom
| | - Francis D Murgatroyd
- Cardiology Department, King's College Hospital, London, United Kingdom; King's College London, British Heart Foundation Centre, London, United Kingdom
| | - Mark J Monaghan
- Cardiology Department, King's College Hospital, London, United Kingdom; King's College London, British Heart Foundation Centre, London, United Kingdom
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16
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Yang T, Lu M, Ouyang W, Li B, Yang Y, Zhao S, Sun H. Prognostic value of myocardial scar by magnetic resonance imaging in patients undergoing coronary artery bypass graft. Int J Cardiol 2020; 326:49-54. [PMID: 33296720 DOI: 10.1016/j.ijcard.2020.10.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 07/01/2020] [Accepted: 10/16/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Previous studies demonstrated that scar tissue assessed by late gadolinium enhancement cardiovascular magnetic resonance imaging (LGE-CMR) is associated with recovery of cardiac function after coronary artery bypass graft (CABG) in patients with a history of myocardial infarction (MI). However, information on the association between myocardial scar at baseline and long-term survival after CABG in these patients is lacking. METHODS From April 2010 to May 2013, consecutive patients with multivessel coronary artery disease (CAD, > 70% stenosis in ≥2 vessels) and MI (> 3 months) who underwent LGE-CMR within 1 month prior to isolated CABG were enrolled. Left ventricular functional parameters and scar tissue were assessed by LGE-CMR before surgery. A standard 17-segment model was used for scar quantification. Predictors for cardiovascular events (CVEs) were analyzed. RESULTS Of 148 patients who met the study inclusion/exclusion criteria, 140 cases had follow-up data and were included in final analysis. Of the latter, 27 (19.3%) patients suffered CVEs perioperatively or during mean 89.6 ± 12.0 months follow-up. In Cox proportional hazard regression model, the most significant predictor for CVEs after CABG was the number of scar segments on LGE-CMR (Hazard ratio 2.078, 95% Confidence Interval 1.133-3.814, P= 0.018). In Receiver-Operator-Characteristic (ROC) analysis, number of scar segments ≥6 predicted CVEs (sensitivity, 74.1%; specificity, 95.6%; area under the curve [AUC] = 0.934, P < 0.001). CONCLUSIONS Scar tissue identified by LGE-CMR appears to be an independent predictor of CVEs after CABG in patients with a history of MI, which might allow preoperative risk stratification.
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Affiliation(s)
- Tao Yang
- Department of Cardiovascular Surgery, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing, 100037, China
| | - Minjie Lu
- Department of Radiology, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing 100037, China
| | - Wenbin Ouyang
- Department of Cardiovascular Surgery, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing, 100037, China
| | - Baotong Li
- Department of Cardiovascular Surgery, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing, 100037, China
| | - Yan Yang
- Department of Cardiovascular Surgery, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing, 100037, China
| | - Shihua Zhao
- Department of Radiology, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing 100037, China
| | - Hansong Sun
- Department of Cardiovascular Surgery, Cardiovascular Institute and Fu Wai Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases, No.167 North Lishi Road, Xicheng District, Beijing, 100037, China..
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Kolluru L, Srikala J, Rao HN, Maheen S, Rao BH. Incremental value of Late Gadolinium Enhancement by Cardiac MRI in risk stratification of heart failure patients with moderate and severe LV dysfunction. Indian Heart J 2020; 73:49-55. [PMID: 33714409 PMCID: PMC7961248 DOI: 10.1016/j.ihj.2020.11.150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/10/2020] [Accepted: 11/22/2020] [Indexed: 11/28/2022] Open
Abstract
Objective This is a prospective study of patients with LVEF ≤40%, with the objective of correlating CV events to LGE detected and quantified by CMRI. Methods Heart Failure (HF) patients with LVEF <40% who underwent CMRI were included. LGE volume of ≥6% of the myocardial volume was considered significant. Data of appropriate ICD shocks, CV hospitalizations and mortality were recorded. Results There were 133 HF (72 ICM & 62 NIDCM) patients with a mean age of 54 ± 12 years, mean LVEF of 34 ± 6% and a follow up of 24 ± 3 months. Totally 46 CV events were recorded in 30 patients, 44 in LGE +ve & 2 in LGE -ve groups (HR 17.8, 95% CI-8.03-39.3, P = 0.000095). All the 7 deaths were in LGE +ve group. CV events were 22 (30.5%) in ICM group and 8 (13.1%) in NIDCM group (p = 0.03). All the 22 ICM patients and 6 of the 8 NIDCM with CV events were LGE +ve. The distribution of CV events amongst LGE +ve and LGE -ve were 35 vs 0 (ICM) and 9 vs 2 (NIDCM); p < 0.005.CV events in LVEF ≤ 30% group, were seen in 19 (47.5%) vs 1 (5.8%) in LGE +ve vs LGE -ve and no of events were 29 vs 1 (p = 0.003). In those with LVEF >30% the corresponding figures were 9 (22.5%) vs 1 (2.8%) and 15 vs 1 respectively (p = 0.02). Conclusion Demonstration of significant LGE by CMRI indicates high risk occurrence of CV events (CV hospitalization, appropriate shocks and total mortality) in NIDCM & ICM patients with LVEF < 40%.
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Affiliation(s)
- Laxman Kolluru
- Department of Cardiology, KIMS Hospitals, Hyderabad, India
| | - Jwala Srikala
- Department of Radiology, KIMS Hospitals, Hyderabad, India
| | - H Nagaraj Rao
- Department of Cardiology, KIMS Hospitals, Nellore, India
| | - Sania Maheen
- Department of Radiology, KIMS Hospitals, Hyderabad, India
| | - B Hygriv Rao
- Department of Cardiology, KIMS Hospitals, Hyderabad, India; Arrhythmia Research & Training Society(ARTS), Hyderabad, India.
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18
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Tehrani BN, Basir MB, Kapur NK. Acute myocardial infarction and cardiogenic shock: Should we unload the ventricle before percutaneous coronary intervention? Prog Cardiovasc Dis 2020; 63:607-622. [PMID: 32920027 DOI: 10.1016/j.pcad.2020.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 09/03/2020] [Indexed: 12/22/2022]
Abstract
Despite early reperfusion and coordinated systems of care, cardiogenic shock (CS) remains the number one cause of morbidity and in-hospital mortality following acute myocardial infarction (AMI). CS is a complex clinical syndrome that begins with hemodynamic instability and can progress to multi-organ failure and profound hemo-metabolic compromise. To improve outcomes, a clear understanding of the treatment objectives in CS and developing time-sensitive management strategies aimed at stabilizing hemodynamics and restoring myocardial perfusion are critical. Left ventricular (LV) load has been identified as an independent predictor of heart failure and mortality following AMI. Decades of preclinical and clinical research have identified several effective LV unloading strategies. Recent initiatives from single and multi-center registries and more recently the Door to Unload (DTU)-STEMI pilot study have provided valuable insight to developing a standardized treatment approach to AMI, based on early invasive hemodynamics and tailored circulatory support to unload the LV. To follow is a review of the pathophysiology and prevalence of shock, limitations of current therapies, and the pre-clinical and translational basis for incorporating LV unloading into contemporary AMI and shock care.
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Affiliation(s)
- Behnam N Tehrani
- Inova Heart and Vascular Institute, Falls Church, VA, United States of America
| | - Mir B Basir
- Henry Ford Medical Center, Detroit, MI, United States of America
| | - Navin K Kapur
- The CardioVascular Center, Tufts Medical Center, Boston, MA, United States of America.
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Vazir A, Fox K, Westaby J, Evans MJ, Westaby S. Can we remove scar and fibrosis from adult human myocardium? Eur Heart J 2020; 40:960-966. [PMID: 30203057 DOI: 10.1093/eurheartj/ehy503] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 07/09/2018] [Accepted: 09/04/2018] [Indexed: 12/12/2022] Open
Abstract
The pathological processes leading to heart failure are characterized by the formation of fibrosis and scar, yet the dynamics of scar production and removal are incompletely understood. Spontaneous disappearance of myocardial collagen is reported in infancy but doubted in adulthood where scar volume constitutes a better prognostic indicator than the conventional parameters of ventricular function. Whilst certain drugs are known to attenuate myocardial fibrosis evidence is emerging that stem cell therapy also has the potential to reduce scar size and improve myocardial viability. Both animal studies and clinical trials support the concept that, as in infancy, cellular processes can be triggered to remove collagen and regenerate injured myocardium. The molecular mechanisms likely involve anti-fibrotic cytokines growth factors and matrix-metalloproteinases. Autologous cardiac, bone-marrow and adipose tissue derived stem cells have each shown efficacy. Specific immune privileged mesenchymal stem cells and genetically modified immunomodulatory progenitor cells may in turn provide an allogenic source for the paracrine effects. Thus autologous and allogenic cells both have the potential through paracrine action to reduce scar volume, boost angiogenesis and improve ventricular morphology. The potential benefit of myocardial cell therapy for routine treatment of heart failure is an area that requires further study.
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Affiliation(s)
- Ali Vazir
- National Heart and Lung Institute, Imperial College London and ICMS, Royal Brompton Hospital, Dovehouse Street, London, UK
| | - Kim Fox
- National Heart and Lung Institute, Imperial College London and ICMS, Royal Brompton Hospital, Dovehouse Street, London, UK
| | - Joseph Westaby
- Department of Pathology, St George's University Hospital NHS Foundation Trust, Blackshaw Road, Tooting, London, UK
| | - Martin J Evans
- School of Biosciences, Cardiff University, The Sir Martin Evans Building, Museum Avenue, Cardiff, Wales, UK
| | - Stephen Westaby
- National Heart and Lung Institute, Imperial College London and ICMS, Royal Brompton Hospital, Dovehouse Street, London, UK.,Institute of Life Science, Swansea University, Singleton Park, Swansea, Wales, UK
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Abstract
Fragment QRS (fQRS) complex is a myocardial conduction abnormality that indicates myocardial scar. It is defined as additional notches in the QRS complex. Though initially fQRS was defined in the setting of normal QRS duration (<120 m s), later it has been expanded to include conditions with wide QRS complexes as in bundle branch block, ventricular ectopy and paced rhythm, when more than 2 notches are present. It is an important, yet often overlooked marker of mortality and arrhythmic events in many cardiac diseases. The significance of fQRS lies in the fact that it just requires a surface ECG for its recording and the value of information about the condition of the heart it dispenses based on the clinical setting. We review the role of fQRS in predicting adverse cardiac events in various conditions.
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Affiliation(s)
- R N Supreeth
- Baby Memorial Hospital, Kozhikode, Kerala, India
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21
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Hajek P, Safarikova I, Baxa J. Image-guided left ventricular lead placement in cardiac resynchronization therapy: focused on image fusion methods. J Appl Biomed 2019; 17:199-208. [PMID: 34907722 DOI: 10.32725/jab.2019.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 10/30/2019] [Indexed: 11/05/2022] Open
Abstract
Cardiac resynchronization therapy is an effective and widely accessible treatment for patients with advanced, drug-refractory heart failure. It has been shown to reverse maladaptive ventricular remodeling, increase exercise capacity, and lower hospitalization and mortality rates. However, there still exists a considerable proportion of patients who do not respond favorably to the therapy. Tailored left ventricular (LV) lead positioning instead of empiric implantation is thought to have the greatest potential to increase response rates. In our paper, we focus on the rationale for guided LV lead implantation and provide a review of the non-invasive imaging modalities applicable for navigation during LV lead implantation, with special attention to the latest achievements in the field of multimodality imaging and image fusion techniques. Current limitations and future perspectives of the concept are discussed as well.
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Affiliation(s)
- Premysl Hajek
- Ceske Budejovice Hospital, Department of Cardiology, Ceske Budejovice, Czech Republic
| | - Iva Safarikova
- Ceske Budejovice Hospital, Department of Cardiology, Ceske Budejovice, Czech Republic.,University of South Bohemia in Ceske Budejovice, Faculty of Health and Social Sciences, Budejovice, Czech Republic
| | - Jan Baxa
- Charles University in Prague, University Hospital and Faculty of Medicine in Pilsen, Department of Imaging Methods, Pilsen, Czech Republic
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22
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Erley J, Genovese D, Tapaskar N, Alvi N, Rashedi N, Besser SA, Kawaji K, Goyal N, Kelle S, Lang RM, Mor-Avi V, Patel AR. Echocardiography and cardiovascular magnetic resonance based evaluation of myocardial strain and relationship with late gadolinium enhancement. J Cardiovasc Magn Reson 2019; 21:46. [PMID: 31391036 PMCID: PMC6686365 DOI: 10.1186/s12968-019-0559-y] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 07/01/2019] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVES We sought to: (1) determine the agreement in cardiovascular magnetic resonance (CMR) and speckle tracking echocardiography (STE) derived strain measurements, (2) compare their reproducibility, (3) determine which approach is best related to CMR late gadolinium enhancement (LGE). BACKGROUND While STE-derived strain is routinely used to assess left ventricular (LV) function, CMR strain measurements are not yet standardized. Strain can be measured using dedicated pulse sequences (strain-encoding, SENC), or post-processing of cine images (feature tracking, FT). It is unclear whether these measurements are interchangeable, and whether strain can be used as an alternative to LGE. METHODS Fifty patients underwent 2D echocardiography and 1.5 T CMR. Global longitudinal strain (GLS) was measured by STE (Epsilon), FT (NeoSoft) and SENC (Myocardial Solutions) and circumferential strain (GCS) by FT and SENC. RESULTS GLS showed good inter-modality agreement (r-values: 0.71-0.75), small biases (< 1%) but considerable limits of agreement (- 7 to 8%). The agreement between the CMR techniques was better for GLS than GCS (r = 0.81 vs 0.67; smaller bias). Repeated measurements showed low intra- and inter-observer variability for both GLS and GCS (intraclass correlations 0.86-0.99; coefficients of variation 3-13%). LGE was present in 22 (44%) of patients. Both SENC- and FT-derived GLS and GCS were associated with LGE, while STE-GLS was not. Irrespective of CMR technique, this association was stronger for GCS (AUC 0.77-0.78) than GLS (AUC 0.67-0.72) and STE-GLS (AUC = 0.58). CONCLUSION There is good inter-technique agreement in strain measurements, which were highly reproducible, irrespective of modality or analysis technique. GCS may better reflect the presence of underlying LGE than GLS.
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Affiliation(s)
- Jennifer Erley
- Department of Internal Medicine / Cardiology, German Heart Center, Berlin, Germany
| | - Davide Genovese
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
- Department of Cardiac, Thoracic and Vascular Sciences, University of Padua, Padua, Italy
| | - Natalie Tapaskar
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
| | - Nazia Alvi
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
- Department of Cardiology, Riverside Medical Center, Kankakee, IL USA
| | - Nina Rashedi
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
| | - Stephanie A. Besser
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
| | - Keigo Kawaji
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL USA
| | - Neha Goyal
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
| | - Sebastian Kelle
- Department of Internal Medicine / Cardiology, German Heart Center, Berlin, Germany
- Department of Internal Medicine/Cardiology, Charité Campus Virchow Klinikum, Berlin, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Berlin, Berlin, Germany
| | - Roberto M. Lang
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
| | - Victor Mor-Avi
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
| | - Amit R. Patel
- Department of Medicine, University of Chicago Medical Center, 5758 S. Maryland Avenue, MC9067, Chicago, IL 60637 USA
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23
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Holtackers RJ, Van De Heyning CM, Nazir MS, Rashid I, Ntalas I, Rahman H, Botnar RM, Chiribiri A. Clinical value of dark-blood late gadolinium enhancement cardiovascular magnetic resonance without additional magnetization preparation. J Cardiovasc Magn Reson 2019; 21:44. [PMID: 31352900 PMCID: PMC6661833 DOI: 10.1186/s12968-019-0556-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 06/14/2019] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND For two decades, bright-blood late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) has been considered the reference standard for the non-invasive assessment of myocardial viability. While bright-blood LGE can clearly distinguish areas of myocardial infarction from viable myocardium, it often suffers from poor scar-to-blood contrast, making subendocardial scar difficult to detect. Recently, we proposed a novel dark-blood LGE approach that increases scar-to-blood contrast and thereby improves subendocardial scar conspicuity. In the present study we sought to assess the clinical value of this novel approach in a large patient cohort with various non-congenital ischemic and non-ischemic cardiomyopathies on both 1.5 T and 3 T CMR scanners of different vendors. METHODS Three hundred consecutive patients referred for clinical CMR were randomly assigned to a 1.5 T or 3 T scanner. An entire short-axis stack and multiple long-axis views were acquired using conventional phase sensitive inversion recovery (PSIR) LGE with TI set to null myocardium (bright-blood) and proposed PSIR LGE with TI set to null blood (dark-blood), in a randomized order. The bright-blood LGE and dark-blood LGE images were separated, anonymized, and interpreted in a random order at different time points by one of five independent observers. Each case was analyzed for the type of scar, per-segment transmurality, papillary muscle enhancement, overall image quality, observer confidence, and presence of right ventricular scar and intraventricular thrombus. RESULTS Dark-blood LGE detected significantly more cases with ischemic scar compared to conventional bright-blood LGE (97 vs 89, p = 0.008), on both 1.5 T and 3 T, and led to a significantly increased total scar burden (3.3 ± 2.4 vs 3.0 ± 2.3 standard AHA segments, p = 0.015). Overall image quality significantly improved using dark-blood LGE compared to bright-blood LGE (81.3% vs 74.0% of all segments were of highest diagnostic quality, p = 0.006). Furthermore, dark-blood LGE led to significantly higher observer confidence (confident in 84.2% vs 78.4%, p = 0.033). CONCLUSIONS The improved detection of ischemic scar makes the proposed dark-blood LGE method a valuable diagnostic tool in the non-invasive assessment of myocardial scar. The applicability in routine clinical practice is further strengthened, as the present approach, in contrast to other recently proposed dark- and black-blood LGE techniques, is readily available without the need for scanner adjustments, extensive optimizations, or additional training.
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Affiliation(s)
- Robert J. Holtackers
- Department of Radiology, Maastricht University Medical Centre, Maastricht, the Netherlands
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Caroline M. Van De Heyning
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- Department of Cardiology, St Thomas’ Hospital, London, UK
- Department of Cardiology, Antwerp University Hospital, Edegem, Belgium
- Cardiovascular Diseases, University of Antwerp, Antwerp, Belgium
| | - Muhummad Sohaib Nazir
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- Department of Cardiology, St Thomas’ Hospital, London, UK
| | - Imran Rashid
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- Department of Cardiology, St Thomas’ Hospital, London, UK
| | - Ioannis Ntalas
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- Department of Cardiology, St Thomas’ Hospital, London, UK
| | - Haseeb Rahman
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- Department of Cardiology, St Thomas’ Hospital, London, UK
| | - René M. Botnar
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
- Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Amedeo Chiribiri
- Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, King’s College London, 4th Floor, Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH UK
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Markman TM, Bluemke D, Soliman EZ, Wu C, Kawel-Boehm N, Lima JAC, Nazarian S. Baseline ST elevation and myocardial scar: Results from the multi-ethnic study of atherosclerosis. J Electrocardiol 2019; 56:29-33. [PMID: 31247443 DOI: 10.1016/j.jelectrocard.2019.06.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 05/18/2019] [Accepted: 06/17/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND The mechanism of ST elevation on baseline electrocardiograms (ECG) unknown but it may be associated with abnormal myocardial substrate. This paper evaluates whether clinically unrecognized myocardial scar on cardiac magnetic resonance imaging (CMR) is associated with ST elevation at baseline. METHODS The Multi-Ethnic Study of Atherosclerosis (MESA) study is a population-based cohort in the United States. Participants were aged 45 through 84 years and free of clinical cardiovascular disease at enrollment in 2000-2002. Our cohort included 1365 participants who underwent both ECG and contrast enhanced CMR in the 5th examination (2010-2012). Multivariable logistic regression examined the association of ST elevation and CMR defined regional myocardial scar after adjusting for cardiovascular risk factors. RESULTS Of 1365 participants (58 ±9 years, 52% men), 105 (8%) had scar on CMR. Of these, the scar in 40 participants followed an ischemic pattern and in the other 65 participants followed a non-ischemic pattern. ST elevation at the 5th examination was present in 435 participants: 40 (0.9%) had ST elevations in inferior and 427 (98%) in lateral leads. 2/40 (5%) and 22/427 (5%) participants with inferior and lateral ST elevations, respectively, had evidence of scar. 15 (1.0%) had myocardial scar noted in the basal anterior region. In the fully adjusted models, ST elevation was associated with scar in basal anterior region (OR 18.2, p = 0.031). CONCLUSIONS In a community population, ST elevation at baseline in the inferior or lateral leads was associated with myocardial scar in the basal inferior and anterior segments. The previously described association between ST elevation and increased mortality may be mediated by myocardial scar.
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Kidoh M, Oda S, Utsunomiya D, Emoto T, Nakaura T, Nagayama Y, Yamamoto M, Sakamoto K, Yamamoto E, Kaikita K, Tsujita K, Yamashita Y. Basal septal perforator vein mimicking the "late iodine enhancement" in delayed phase cardiac CT for myocardial scar assessment. Radiol Case Rep 2019; 14:588-90. [PMID: 30891108 DOI: 10.1016/j.radcr.2019.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 11/29/2022] Open
Abstract
Delayed-phase cardiac CT is a useful tool for scar detection, based on differences in the volume of distribution of iodine. Although it covers the entire heart, provides uniform, high isotropic spatial resolution, and therefore may be useful for detecting small late iodine enhancement (LIE), we need to correctly differentiate small LIE and pseudo-lesions mimicking LIE. In this case report, we demonstrate basal septal perforator vein mimicking LIE in delayed phase cardiac CT. Left ventricular myocardium includes not only septal vein and artery but also capillaries, arterio- and venoluminal vessels, and sinusoids, etc. which connect to septal veins. To avoid misinterpretations of myocardial LIE on the delayed phase images, we need to understand those anatomical features.
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Wieslander B, Xia X, Jablonowski R, Axelsson J, Klem I, Nijveldt R, Maynard C, Schelbert EB, Sörensson P, Sigfridsson A, Chaudhry U, Platonov PG, Borgquist R, Engblom H, Couderc JP, Strauss DG, Atwater BD, Ugander M. The ability of the electrocardiogram in left bundle branch block to detect myocardial scar determined by cardiovascular magnetic resonance. J Electrocardiol 2018; 51:779-786. [PMID: 30177312 DOI: 10.1016/j.jelectrocard.2018.05.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/19/2018] [Accepted: 05/29/2018] [Indexed: 12/24/2022]
Abstract
AIMS We aimed to improve the electrocardiographic 2009 left bundle branch block (LBBB) Selvester QRS score (2009 LBSS) for scar assessment. METHODS We retrospectively identified 325 LBBB patients with available ECG and cardiovascular magnetic resonance imaging (CMR) with late gadolinium enhancement from four centers (142 [44%] with CMR scar). Forty-four semi-automatically measured ECG variables pre-selected based on the 2009 LBSS yielded one multivariable model for scar detection and another for scar quantification. RESULTS The 2009 LBSS achieved an area under the curve (AUC) of 0.60 (95% confidence interval 0.54-0.66) for scar detection, and R2 = 0.04, p < 0.001, for scar quantification. Multivariable modeling improved scar detection to AUC 0.72 (0.66-0.77) and scar quantification to R2 = 0.21, p < 0.001. CONCLUSIONS The 2009 LBSS detects and quantifies myocardial scar with poor accuracy. Improved models with extensive comparison of ECG and CMR had modest performance, indicating limited room for improvement of the 2009 LBSS.
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Affiliation(s)
- Björn Wieslander
- Department of Clinical Physiology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Xiaojuan Xia
- Heart Research Follow-Up Program, University of Rochester, NY, USA
| | - Robert Jablonowski
- Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Lund University, Lund, Sweden
| | - Jimmy Axelsson
- Department of Clinical Physiology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Igor Klem
- Division of Cardiology, Duke University Medical Center, Durham, NC, USA
| | - Robin Nijveldt
- Department of Cardiology, VU University Medical Center, Amsterdam, the Netherlands
| | - Charles Maynard
- Department of Health Services, University of Washington, Seattle, WA, USA
| | | | - Peder Sörensson
- Department of Clinical Physiology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden; Department of Cardiology, Karolinska University Hospital, Stockholm, Sweden
| | - Andreas Sigfridsson
- Department of Clinical Physiology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Uzma Chaudhry
- Arrhythmia Clinic, Skane University Hospital, Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Pyotr G Platonov
- Arrhythmia Clinic, Skane University Hospital, Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Rasmus Borgquist
- Arrhythmia Clinic, Skane University Hospital, Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
| | - Henrik Engblom
- Department of Clinical Physiology and Nuclear Medicine, Skåne University Hospital, Lund University, Lund, Sweden
| | | | - David G Strauss
- Department of Clinical Physiology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden; Division of Applied Regulatory Science, Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, US Food and Drug Administration, Silver Spring, MD, USA
| | - Brett D Atwater
- Division of Cardiology, Duke University Medical Center, Durham, NC, USA
| | - Martin Ugander
- Department of Clinical Physiology, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden.
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Badertscher P, Strebel I, Honegger U, Schaerli N, Mueller D, Puelacher C, Wagener M, Abächerli R, Walter J, Sabti Z, Sazgary L, Marbot S, du Fay de Lavallaz J, Twerenbold R, Boeddinghaus J, Nestelberger T, Kozhuharov N, Breidthardt T, Shrestha S, Flores D, Schumacher C, Wild D, Osswald S, Zellweger MJ, Mueller C, Reichlin T. Automatically computed ECG algorithm for the quantification of myocardial scar and the prediction of mortality. Clin Res Cardiol 2018; 107:824-835. [PMID: 29667014 DOI: 10.1007/s00392-018-1253-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 04/10/2018] [Indexed: 01/15/2023]
Abstract
BACKGROUND Myocardial scar is associated with adverse cardiac outcomes. The Selvester QRS-score was developed to estimate myocardial scar from the 12-lead ECG, but its manual calculation is difficult. An automatically computed QRS-score would allow identification of patients with myocardial scar and an increased risk of mortality. OBJECTIVES To assess the diagnostic and prognostic value of the automatically computed QRS-score. METHODS The diagnostic value of the QRS-score computed automatically from a standard digital 12-lead was prospectively assessed in 2742 patients with suspected myocardial ischemia referred for myocardial perfusion imaging (MPI). The prognostic value of the QRS-score was then prospectively tested in 1151 consecutive patients presenting to the emergency department (ED) with suspected acute heart failure (AHF). RESULTS Overall, the QRS-score was significantly higher in patients with more extensive myocardial scar: the median QRS-score was 3 (IQR 2-5), 4 (IQR 2-6), and 7 (IQR 4-10) for patients with 0, 5-20 and > 20% myocardial scar as quantified by MPI (p < 0.001 for all pairwise comparisons). A QRS-score ≥ 9 (n = 284, 10%) predicted a large scar defined as > 20% of the LV with a specificity of 91% (95% CI 90-92%). Regarding clinical outcomes in patients presenting to the ED with symptoms suggestive of AHF, mortality after 1 year was 28% in patients with a QRS-score ≥ 3 as opposed to 20% in patients with a QRS-score < 3 (p = 0.001). CONCLUSIONS The QRS-score can be computed automatically from the 12-lead ECG for simple, non-invasive and inexpensive detection and quantification of myocardial scar and for the prediction of mortality. TRIAL-REGISTRATION: http://www.clinicaltrials.gov . Identifier, NCT01838148 and NCT01831115.
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Affiliation(s)
- Patrick Badertscher
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Ivo Strebel
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Ursina Honegger
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Nicolas Schaerli
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Deborah Mueller
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Christian Puelacher
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Max Wagener
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Roger Abächerli
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
- Insitute for Medical Engineering (IMT), Lucerne University of Applied Sciences and Arts, Horw, Switzerland
| | - Joan Walter
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Zaid Sabti
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Lorraine Sazgary
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Stella Marbot
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Jeanne du Fay de Lavallaz
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Raphael Twerenbold
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
- Clinic for General and Interventional Cardiology, University Heart Center Hamburg, Hamburg, Germany
| | - Jasper Boeddinghaus
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Thomas Nestelberger
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Nikola Kozhuharov
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Tobias Breidthardt
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
- Department of Internal Medicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Samyut Shrestha
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Dayana Flores
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Carmela Schumacher
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Damian Wild
- Division of Nuclear Medicine, University Hospital Basel, University Basel, Basel, Switzerland
| | - Stefan Osswald
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Michael J Zellweger
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Christian Mueller
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Tobias Reichlin
- Cardiovascular Research Institute Basel (CRIB) and Department of Cardiology, University Hospital Basel, University of Basel, Basel, Switzerland.
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Chew DS, Wilton SB, Kavanagh K, Vaid HM, Southern DA, Ellis L, Howarth AG, White JA, Exner DV. Fragmented QRS complexes after acute myocardial infarction are independently associated with unfavorable left ventricular remodeling. J Electrocardiol 2018; 51:607-612. [PMID: 29996998 DOI: 10.1016/j.jelectrocard.2018.04.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/02/2018] [Accepted: 04/11/2018] [Indexed: 01/07/2023]
Abstract
BACKGROUND Recovery of left ventricular ejection fraction (LVEF) after acute myocardial infarction (MI) is not universal and is difficult to predict. Fragmented QRS (fQRS) complexes are thought to be markers of myocardial scar. We hypothesized that fQRS complexes on 12‑lead surface ECGs during the initial post-MI period would be associated with adverse LV remodeling over the following year. METHODS Change in LVEF between the early (0-2 month) and later (2-12 month) post-MI periods was assessed in two independent cohorts of post-MI patients with initial LV dysfunction. A decline or no recovery in LVEF (ΔLVEF ≤0%) was used as a primary outcome. fQRS complexes were measured on 12‑lead ECGs within a week of acute MI. A subset of patients underwent cardiac magnetic resonance imaging (CMR) for scar quantification. RESULTS Of 705 patients in the combined cohort, 27% experienced the primary outcome (average ΔLVEF of -4%). fQRS complexes were associated with a two-fold higher risk of no LVEF recovery, independent of prior MI or CABG, baseline LVEF, MI location and QRS duration or axis. Of 113 patients undergoing CMR, fQRS was associated with increased peri-infarct zone late gadolinium enhancement (13 ± 5% vs 11 ± 4%, p = 0.02), but not core infarct. CONCLUSIONS Despite contemporary post-MI therapy, >1 in 4 patients will show a decline in LVEF during follow-up. Fragmented QRS complexes on 12‑lead surface ECG early post-MI may be a valuable marker of unfavorable LV remodeling and correlate to increased peri-infarct scar on CMR imaging.
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Affiliation(s)
- Derek S Chew
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Stephen B Wilton
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Katherine Kavanagh
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Haris M Vaid
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Danielle A Southern
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Linda Ellis
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Andrew G Howarth
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - James A White
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada
| | - Derek V Exner
- Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, AB, Canada.
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29
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Nguyên UC, Claridge S, Vernooy K, Engels EB, Razavi R, Rinaldi CA, Chen Z, Prinzen FW. Relationship between vectorcardiographic QRS area, myocardial scar quantification, and response to cardiac resynchronization therapy. J Electrocardiol 2018; 51:457-463. [PMID: 29454649 DOI: 10.1016/j.jelectrocard.2018.01.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/10/2018] [Accepted: 01/24/2018] [Indexed: 01/06/2023]
Abstract
PURPOSE To investigate the relationship between vectorcardiography (VCG) and myocardial scar on cardiac magnetic resonance (CMR) imaging, and whether combining these metrics may improve cardiac resynchronization therapy (CRT) response prediction. METHODS Thirty-three CRT patients were included. QRSarea, Tarea and QRSTarea were derived from the ECG-synthesized VCG. CMR parameters reflecting focal scar core (Scar2SD, Gray2SD) and diffuse fibrosis (pre-T1, extracellular volume [ECV]) were assessed. CRT response was defined as ≥15% reduction in left ventricular end-systolic volume after six months' follow-up. RESULTS VCG QRSarea, Tarea and QRSTarea inversely correlated with focal scar (R = -0.44--0.58 for Scar2SD, p ≤ 0.010), but not with diffuse fibrosis. Scar2SD, Gray2SD and QRSarea predicted CRT response with AUCs of 0.692 (p = 0.063), 0.759 (p = 0.012) and 0.737 (p = 0.022) respectively. A combined ROC-derived threshold for Scar2SD and QRSarea resulted in 92% CRT response rate for patients with large QRSarea and small Scar2SD or Gray2SD. CONCLUSION QRSarea is inversely associated with focal scar on CMR. Incremental predictive value for CRT response is achieved by a combined CMR-QRSarea analysis.
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Affiliation(s)
- Uyên Châu Nguyên
- Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands; Department of Cardiology, Maastricht University Medical Center, CARIM, Maastricht, The Netherlands.
| | - Simon Claridge
- Department of Cardiology, Guys and St Thomas' NHS Trust, London, United Kingdom
| | - Kevin Vernooy
- Department of Cardiology, Maastricht University Medical Center, CARIM, Maastricht, The Netherlands
| | - Elien B Engels
- Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Reza Razavi
- Division of Imaging Sciences and Biomedical Imaging, King's College London, London, United Kingdom
| | | | - Zhong Chen
- Department of Cardiology, Guys and St Thomas' NHS Trust, London, United Kingdom
| | - Frits W Prinzen
- Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
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Holtackers RJ, Chiribiri A, Schneider T, Higgins DM, Botnar RM. Dark-blood late gadolinium enhancement without additional magnetization preparation. J Cardiovasc Magn Reson 2017; 19:64. [PMID: 28835250 PMCID: PMC5568308 DOI: 10.1186/s12968-017-0372-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 07/11/2017] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND This study evaluates a novel dark-blood late gadolinium enhancement (LGE) cardiovascular magnetic resonance imaging (CMR) method, without using additional magnetization preparation, and compares it to conventional bright-blood LGE, for the detection of ischaemic myocardial scar. LGE is able to clearly depict myocardial infarction and macroscopic scarring from viable myocardium. However, due to the bright signal of adjacent left ventricular blood, the apparent volume of scar tissue can be significantly reduced, or even completely obscured. In addition, blood pool signal can mimic scar tissue and lead to false positive observations. Simply nulling the blood magnetization by choosing shorter inversion times, leads to a negative viable myocardium signal that appears equally as bright as scar due to the magnitude image reconstruction. However, by combining blood magnetization nulling with the extended grayscale range of phase-sensitive inversion-recovery (PSIR), a darker blood signal can be achieved whilst a dark myocardium and bright scar signal is preserved. METHODS LGE was performed in nine male patients (63 ± 11y) using a PSIR pulse sequence, with both conventional viable myocardium nulling and left ventricular blood nulling, in a randomized order. Regions of interest were drawn in the left ventricular blood, viable myocardium, and scar tissue, to assess contrast-to-noise ratios. Maximum scar transmurality, scar size, circumferential scar angle, and a confidence score for scar detection and maximum transmurality were also assessed. Bloch simulations were performed to simulate the magnetization levels of the left ventricular blood, viable myocardium, and scar tissue. RESULTS Average scar-to-blood contrast was significantly (p < 0.001) increased by 99% when nulling left ventricular blood instead of viable myocardium, while scar-to-myocardium contrast was maintained. Nulling left ventricular blood also led to significantly (p = 0.038) higher expert confidence in scar detection and maximum transmurality. No significant changes were found in scar transmurality (p = 0.317), normalized scar size (p = 0.054), and circumferential scar angle (p = 0.117). CONCLUSIONS Nulling left ventricular blood magnetization for PSIR LGE leads to improved scar-to-blood contrast and increased expert confidence in scar detection and scar transmurality. As no additional magnetization preparation is used, clinical application on current MR systems is readily available without the need for extensive optimizations, software modifications, and/or additional training.
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Affiliation(s)
- Robert J. Holtackers
- Division of Imaging Sciences and Biomedical Engineering, King’s College London, London, United Kingdom
- Department of Radiology, Maastricht University Medical Centre, Maastricht, the Netherlands
| | - Amedeo Chiribiri
- Division of Imaging Sciences and Biomedical Engineering, King’s College London, London, United Kingdom
| | | | | | - René M. Botnar
- Division of Imaging Sciences and Biomedical Engineering, King’s College London, London, United Kingdom
- Pontificia Universidad Católica de Chile, Escuela de Ingeniería, Santiago, Chile
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31
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Poels TT, Kats S, Veenstra L, van Ommen V, Maessen JG, Prinzen FW. Reservations about the Selvester QRS score in left bundle branch block - Experience in patients with transcatheter aortic valve implantation. J Electrocardiol 2017; 50:261-267. [PMID: 28126337 DOI: 10.1016/j.jelectrocard.2017.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Indexed: 01/15/2023]
Abstract
BACKGROUND The Selvester QRS score (S-score) estimates myocardial scar using electrocardiographic criteria. We evaluated the S-score for left bundle branch block (LBBB). MATERIAL AND METHODS Studied were 36 patients who developed persistent LBBB upon transcatheter aortic valve implantation (TAVI, TAVI-LBBB group) and 36 matched patients with persistent narrow QRS (TAVI-nQRS group). Electrocardiograms were recorded before and briefly after TAVI and during ~6months follow-up. S-score was calculated using criteria for hypertrophic (in absence of LBBB) or LBBB hearts. RESULTS In TAVI-LBBB patients correlation between S-scores pre-TAVI and post-TAVI was absent (R2=0.023). High S-scores post-TAVI occurred in patients with low pre-TAVI scores. Pre-post TAVI scores correlated weakly in TAVI-nQRS (R2=0.182), indicating a possible influence of ventricular unloading by TAVI. In both groups S-scores at post-TAVI and follow-up compared reasonably (R2=0.389 and R2=0.386), indicating reproducibility in more stable conditions. CONCLUSION This study indicates that the use of the LBBB S-score criteria overestimates scar size and that caution is recommended in the use of the score in patients with LBBB.
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Affiliation(s)
- Thomas T Poels
- Department of Cardiothoracic Surgery, Maastricht University Medical Center, PO Box 5800, Maastricht, The Netherlands
| | - Suzanne Kats
- Department of Cardiothoracic Surgery, Maastricht University Medical Center, PO Box 5800, Maastricht, The Netherlands
| | - Leo Veenstra
- Department of Cardiology, Maastricht University Medical Center, PO Box 5800, Maastricht, The Netherlands
| | - Vincent van Ommen
- Department of Cardiology, Maastricht University Medical Center, PO Box 5800, Maastricht, The Netherlands
| | - Jos G Maessen
- Department of Cardiothoracic Surgery, Maastricht University Medical Center, PO Box 5800, Maastricht, The Netherlands
| | - Frits W Prinzen
- CARIM School for Cardiovascular Diseases, PO Box 616, Maastricht, The Netherlands.
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Aly MFA, Kleijn SA, Menken-Negroiu RF, Robbers LF, Beek AM, Kamp O. Three-dimensional speckle tracking echocardiography and cardiac magnetic resonance for left ventricular chamber quantification and identification of myocardial transmural scar. Neth Heart J 2016; 24:600-8. [PMID: 27538926 PMCID: PMC5039133 DOI: 10.1007/s12471-016-0876-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background We compared three-dimensional speckle tracking echocardiography (3DSTE) and its strain to cardiac magnetic resonance (CMR) with delayed contrast enhancement for left ventricular (LV) chamber quantification and transmurality of myocardial scar. Furthermore, we examined the ability of 3DSTE strain to differentiate between ischaemic and non-ischaemic LV dysfunction. Methods In 80 consecutive patients with ischaemic and 40 patients with non-ischaemic LV dysfunction, the correlations between LV volumes and ejection fraction were measured using 3DSTE and CMR. Global and regional 3DSTE strains and total or percentage enhanced LV mass were evaluated. Results LV end-diastolic and end-systolic volumes and ejection fraction correlated well between 3DSTE and CMR (r: 0.83, 0.88 and 0.89, respectively). However, 3DSTE significantly underestimated volumes. Correlation for LV mass was modest (r = 0.59). All 3DSTE regional strain values except for radial strain were lower in segments with versus segments without transmural enhancement. However, strain parameters could not identify the transmurality of scar. No significant difference between ischaemic and non-ischaemic LV dysfunction was observed in either global or regional 3DSTE strain except for twist, which was lower in the non-ischaemic group (4.9 ± 3.3 vs. 6.4 ± 3.2°, p = 0.03). Conclusion 3DSTE LV volumes are underestimated compared with CMR, while LV ejection fraction revealed excellent accuracy. Functional impairment by 3DSTE strain does not correlate well with scar localisation or extent by CMR. 3DSTE strain could not differentiate between ischaemic and non-ischaemic LV dysfunction. Future studies will need to clarify if 3DSTE strain and CMR delayed contrast enhancement can provide incremental value to the prediction of future cardiovascular events.
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Affiliation(s)
- M F A Aly
- Department of Cardiology, and Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam, The Netherlands. .,Department of Cardiology, University Hospital, Beni-Suef, Egypt.
| | - S A Kleijn
- Department of Cardiology, and Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam, The Netherlands
| | - R F Menken-Negroiu
- Department of Cardiology, and Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam, The Netherlands
| | - L F Robbers
- Department of Cardiology, and Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam, The Netherlands
| | - A M Beek
- Department of Cardiology, and Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam, The Netherlands
| | - O Kamp
- Department of Cardiology, and Institute for Cardiovascular Research (ICaR-VU), VU University Medical Center, Amsterdam, The Netherlands
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Wieslander B, Loring Z, Zareba W, McNitt S, Wagner GS, Daubert JP, Strauss DG. Scar burden assessed by Selvester QRS score predicts prognosis, not CRT clinical benefit in preventing heart failure event and death: A MADIT-CRT sub-study. J Electrocardiol 2016; 49:603-9. [PMID: 27212144 DOI: 10.1016/j.jelectrocard.2016.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Indexed: 11/18/2022]
Affiliation(s)
- Björn Wieslander
- Department of Clinical Physiology, Karolinska Institutet, Stockholm, Sweden
| | - Zak Loring
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD.
| | - Wojciech Zareba
- Cardiology Unit of the Department of Medicine, University of Rochester Medical Center, Rochester, NY
| | - Scott McNitt
- The Heart Research Follow-Up Program, University of Rochester Medical Center, Rochester, NY
| | | | - James P Daubert
- Electrophysiology Section/Cardiology Division, and Duke Clinical Research Institute, Duke University Medical Center, Durham, NC
| | - David G Strauss
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD
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Nham E, Kim SM, Lee SC, Chang SA, Sung J, Cho SJ, Jang SY, Choe YH. Association of cardiovascular disease risk factors with left ventricular mass, biventricular function, and the presence of silent myocardial infarction on cardiac MRI in an asymptomatic population. Int J Cardiovasc Imaging 2016; 32 Suppl 1:173-81. [PMID: 27209284 DOI: 10.1007/s10554-016-0885-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 03/24/2016] [Indexed: 01/04/2023]
Abstract
The purposes of this study were to evaluate the relationship between risk factors for cardiovascular disease (CVD) and cardiac mass and function on cardiac magnetic resonance imaging (MRI), and to investigate possible risk factors for silent myocardial infarction (SMI) in an asymptomatic Asian population. We included 647 asymptomatic subjects (485 males, mean age 54.8 ± 6.7 years; 162 females, mean age 55.2 ± 7.6 years) who underwent 1.5-T cardiac MRI during a health checkup. The association between biventricular functional parameters as evaluated on MRI and CVD risk factors was examined using multivariable regression and analysis of variance. The left ventricular mass-to-volume ratios were positively related to body mass index (β = 0.153, p < 0.001), systolic (β = 0.165, p = 0.001) and diastolic (β = 0.147, p = 0.002) blood pressure, triglyceride levels (β = 0.197, p = 0.006), and C-reactive protein levels (β = 0.130, p < 0.001), and were negatively related to estimated glomerular filtration rates (β = -0.076, p = 0.025). No significant relationship was present between ventricular parameters and the presence of SMI after adjusting for confounders. The prevalence (6.9 %, 7/101) of SMI in diabetics was significantly greater than that in non-diabetics patients (0.9 %, 5/546; confidence interval 1.739-12.848; p < 0.001). Traditional CVD risk factors are associated with ventricular mass, geometry and function in asymptomatic subjects. Silent MI may not independently influence ventricular mass and function and diabetes mellitus may contribute to the development of SMI.
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Zhang Y, Guallar E, Weiss RG, Stillabower M, Gerstenblith G, Tomaselli GF, Wu KC. Associations between scar characteristics by cardiac magnetic resonance and changes in left ventricular ejection fraction in primary prevention defibrillator recipients. Heart Rhythm 2016; 13:1661-6. [PMID: 27108939 DOI: 10.1016/j.hrthm.2016.04.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Indexed: 12/25/2022]
Abstract
BACKGROUND Left ventricular ejection fraction (LVEF) improves over time in 25%-40% of patients with cardiomyopathy with primary prevention implantable cardioverter-defibrillator (ICD). The determinants of LVEF improvement, however, are not well characterized. OBJECTIVES We sought to examine the associations of clinical risk factors and cardiac imaging markers with changes in LVEF after ICD implantation. METHODS We conducted a retrospective analysis of cardiac magnetic resonance images in 202 patients who underwent primary prevention ICD implantation to quantify the amount of heterogeneous myocardial tissue (gray zone), dense core, and total scar. LVEF was reassessed at least once after ICD implantation. RESULTS Over a mean follow-up of 3 years, LVEF decreased in 43 (21.3%), improved in 88 (43.6%), and was unchanged in 71 (35.1%) of the patients. Baseline LVEF and myocardial scar characteristics were the strongest determinants of LVEF trajectory with high scar burden and increasing lack of myocardial viability associated with a greater decline in LVEF. There was a trend toward an association between both changes in LVEF and scar extent with subsequent appropriate ICD shock. Changes in LVEF were also strongly associated with heart failure hospitalizations. CONCLUSION Scar burden and characteristics were strong determinants, independent of baseline LVEF and other traditional cardiovascular risk factors, of changes in LVEF. Both worsened LVEF and high scar extent were associated with a trend toward increased risk of appropriate shock. These findings suggest that baseline cardiac magnetic resonance imaging of the myocardial substrate may provide important prognostic information on subsequent left ventricular remodeling and adverse events.
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Affiliation(s)
- Yiyi Zhang
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Eliseo Guallar
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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Deva DP, Hanneman K, Li Q, Ng MY, Wasim S, Morel C, Iwanochko RM, Thavendiranathan P, Crean AM. Cardiovascular magnetic resonance demonstration of the spectrum of morphological phenotypes and patterns of myocardial scarring in Anderson-Fabry disease. J Cardiovasc Magn Reson 2016; 18:14. [PMID: 27036375 PMCID: PMC4818406 DOI: 10.1186/s12968-016-0233-6] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/15/2016] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Although it is known that Anderson-Fabry Disease (AFD) can mimic the morphologic manifestations of hypertrophic cardiomyopathy (HCM) on echocardiography, there is a lack of cardiovascular magnetic resonance (CMR) literature on this. There is limited information in the published literature on the distribution of myocardial fibrosis in patients with AFD, with scar reported principally in the basal inferolateral midwall. METHODS All patients with confirmed AFD undergoing CMR at our center were included. Left ventricular (LV) volumes, wall thicknesses and scar were analyzed offline. Patients were categorized into 4 groups: (1) no wall thickening; (2) concentric hypertrophy; (3) asymmetric septal hypertrophy (ASH); and (4) apical hypertrophy. Charts were reviewed for clinical information. RESULTS Thirty-nine patients were included (20 males [51%], median age 45.2 years [range 22.3-64.4]). Almost half (17/39) had concentric wall thickening. Almost half (17/39) had pathologic LV scar; three quarters of these (13/17) had typical inferolateral midwall scar. A quarter (9/39) had both concentric wall thickening and typical inferolateral scar. A subgroup with ASH and apical hypertrophy (n = 5) had greater maximum wall thickness, total LV scar, apical scar and mid-ventricular scar than those with concentric hypertrophy (n = 17, p < 0.05). Patients with elevated LVMI had more overall arrhythmia (p = 0.007) more ventricular arrhythmia (p = 0.007) and sustained ventricular tachycardia (p = 0.008). CONCLUSIONS Concentric thickening and inferolateral mid-myocardial scar are the most common manifestations of AFD, but the spectrum includes cases morphologically identical to apical and ASH subtypes of HCM and these have more apical and mid-ventricular LV scar. Significant LVH is associated with ventricular arrhythmia.
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Affiliation(s)
- Djeven Parameshvara Deva
- />Department of Medical Imaging, St. Michael’s Hospital, University of Toronto, 30, Bond Street, Toronto, ON M5B 1W8 Canada
| | - Kate Hanneman
- />Department of Medical Imaging, Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, 585 University Ave, Toronto, ON M5G 2N2 Canada
| | - Qin Li
- />Division of Cardiology, Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, 585 University Ave, Toronto, ON M5G 2N2 Canada
| | - Ming Yen Ng
- />Department of Medical Imaging, Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, 585 University Ave, Toronto, ON M5G 2N2 Canada
- />Department of Diagnostic Radiology, The University of Hong Kong, Queen Mary Hospital, 102, Pokfulam Road, Hong Kong
| | - Syed Wasim
- />Fred A. Litwin Centre in Genetic Medicine, University Health Network & Mount Sinai Hospital, 60 Murray St., 3rd floor, Room 400, Toronto, M5T 3L9 ON Canada
- />The Hospital for Sick Children, 555, University Avenue, Toronto, ON M5G 1X8 Canada
| | - Chantal Morel
- />Fred A. Litwin Centre in Genetic Medicine, University Health Network & Mount Sinai Hospital, 60 Murray St., 3rd floor, Room 400, Toronto, M5T 3L9 ON Canada
| | - Robert M. Iwanochko
- />Division of Cardiology, Toronto Western Hospital, 399 Bathurst St, Toronto, ON M5T 2S8 Canada
| | - Paaladinesh Thavendiranathan
- />Division of Cardiology, Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, 585 University Ave, Toronto, ON M5G 2N2 Canada
| | - Andrew Michael Crean
- />Department of Medical Imaging, Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, 585 University Ave, Toronto, ON M5G 2N2 Canada
- />Division of Cardiology, Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, 585 University Ave, Toronto, ON M5G 2N2 Canada
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Abstract
Phase analysis of gated myocardial perfusion single-photon emission computed tomography is a widely available and reproducible measure of left ventricular (LV) dyssynchrony, which also provides comprehensive assessment of LV function, global and regional scar burden, and patterns of LV mechanical activation. Preliminary studies indicate potential use in predicting cardiac resynchronization therapy response and elucidation of mechanisms. Because advances in technology may expand capabilities for precise LV lead placement in the future, identification of specific patterns of dyssynchrony may have a critical role in guiding cardiac resynchronization therapy.
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Lee SA, Cha MJ, Cho Y, Oh IY, Choi EK, Oh S. Paced QRS duration and myocardial scar amount: predictors of long-term outcome of right ventricular apical pacing. Heart Vessels 2015; 31:1131-9. [PMID: 26142378 DOI: 10.1007/s00380-015-0707-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 06/19/2015] [Indexed: 11/28/2022]
Abstract
Long-term right ventricular apical pacing (RVAP) is reportedly associated with heart failure (HF) development. However, the predictors of pacing-induced HF (PHF) remained unclear. We retrospectively enrolled 234 patients without structural heart disease who underwent a permanent pacemaker implantation with RVAP between 1982 and 2004. RVAP-induced HF was defined as left ventricular ejection fraction decrease >5 % with HF symptom without other HF development etiology. The QRS duration of a paced beat (pQRSd) and myocardial scar score were analyzed from each patient's 12-lead ECG. During a mean 15.6 years (range 3.3-30.0 years), 48 patients (20.5 %) patients developed RVAP-induced HF. The PHF group patients had a longer pQRSd (192.4 ± 13.5 vs. 175.7 ± 14.7 ms in non-PHF patients, p < 0.001) and a higher myocardial scar score (5.2 ± 1.9 vs. 2.7 ± 1.9, respectively p < 0.001). In multivariate Cox regression analysis, old age at implantation [Hazard ratio (HR) 1.62, 95 % confidential interval (CI) 1.22-2.16, p = 0.001], a longer pQRSd (HR 1.54, 95 % CI 1.15-2.05, p = 0.003), a higher myocardial scar score (HR 1.23, 95 % CI 1.03-1.49, p = 0.037), and a higher percentage of ventricular pacing (HR 1.31, 95 % CI 1.01-1.49, p = 0.010) were independent predictors of PHF. Based on the results of the receiver-operating characteristic (ROC) curve, the pQRSd cutoff was 185 ms (AUC 0.79, sensitivity 66.7 %, specificity 76.3 %) and myocardial scar score cutoff value was 4 (AUC 0.81, sensitivity 81.3 %, specificity 66.1 %). The pQRSd was positively correlated with scar score (r = 0.70, p < 0.001). pQRSd ≥185 ms and/or myocardial scar score ≥4 might be independent long-term prognostic markers of PHF.
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Affiliation(s)
- Seung-Ah Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, Korea
| | - Myung-Jin Cha
- Department of Internal Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea
| | - Youngjin Cho
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, Korea
| | - Il-Young Oh
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, Korea
| | - Eue-Keun Choi
- Department of Internal Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea
| | - Seil Oh
- Department of Internal Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea.
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Truong QA, Thai WE, Wai B, Cordaro K, Cheng T, Beaudoin J, Xiong G, Cheung JW, Altman R, Min JK, Singh JP, Barrett CD, Danik S. Myocardial scar imaging by standard single-energy and dual-energy late enhancement CT: Comparison with pathology and electroanatomic map in an experimental chronic infarct porcine model. J Cardiovasc Comput Tomogr 2015; 9:313-20. [PMID: 25977115 DOI: 10.1016/j.jcct.2015.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/27/2015] [Accepted: 03/16/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Myocardial scar is a substrate for ventricular tachycardia and sudden cardiac death. Late enhancement CT imaging can detect scar, but it remains unclear whether newer late enhancement dual-energy (LE-DECT) acquisition has benefit over standard single-energy late enhancement (LE-CT). OBJECTIVE We aim to compare late enhancement CT using newer LE-DECT acquisition and single-energy LE-CT acquisitions with pathology and electroanatomic map (EAM) in an experimental chronic myocardial infarction (MI) porcine study. METHODS In 8 pigs with chronic myocardial infarction (59 ± 5 kg), we performed dual-source CT, EAM, and pathology. For CT imaging, we performed 3 acquisitions at 10 minutes after contrast administration: LE-CT 80 kV, LE-CT 100 kV, and LE-DECT with 2 postprocessing software settings. RESULTS Of the sequences, LE-CT 100 kV provided the best contrast-to-noise ratio (all P ≤ .03) and correlation to pathology for scar (ρ = 0.88). LE-DECT overestimated scar (both P = .02), whereas LE-CT images did not (both P = .08). On a segment basis (n = 136), all CT sequences had high specificity (87%-93%) and modest sensitivity (50%-67%), with LE-CT 100 kV having the highest specificity of 93% for scar detection compared to pathology and agreement with EAM (κ = 0.69). CONCLUSIONS Standard single-energy LE-CT, particularly 100 kV, matched better to pathology and EAM than dual-energy LE-DECT for scar detection. Larger human trials as well as more technical studies that optimize varying different energies with newer hardware and software are warranted.
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Affiliation(s)
- Quynh A Truong
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College and the New York-Presbyterian Hospital, 413 E. 69th Street, Suite 108, New York, NY 10021, USA; Division of Cardiology, Weill Cornell Medical College and the New York-Presbyterian Hospital, New York, NY, USA.
| | - Wai-Ee Thai
- Cardiac MR PET CT Program, Division of Cardiology, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Bryan Wai
- Cardiac MR PET CT Program, Division of Cardiology, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Kevin Cordaro
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Teresa Cheng
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Jonathan Beaudoin
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Guanglei Xiong
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College and the New York-Presbyterian Hospital, 413 E. 69th Street, Suite 108, New York, NY 10021, USA
| | - Jim W Cheung
- Division of Cardiology, Weill Cornell Medical College and the New York-Presbyterian Hospital, New York, NY, USA
| | - Robert Altman
- Al-Sabah Arrhythmia Institute, Mount Sinai St. Luke's-Roosevelt Hospital Center, New York, NY, USA
| | - James K Min
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College and the New York-Presbyterian Hospital, 413 E. 69th Street, Suite 108, New York, NY 10021, USA; Division of Cardiology, Weill Cornell Medical College and the New York-Presbyterian Hospital, New York, NY, USA
| | - Jagmeet P Singh
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Conor D Barrett
- Al-Sabah Arrhythmia Institute, Mount Sinai St. Luke's-Roosevelt Hospital Center, New York, NY, USA
| | - Stephan Danik
- Al-Sabah Arrhythmia Institute, Mount Sinai St. Luke's-Roosevelt Hospital Center, New York, NY, USA
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Jeevarethinam A, Venuraju S, Mehta VS, Atwal S, Raval U, Rakhit R, Davar J, Lahiri A. Myocardial Scar Detection by Standard CT Coronary Angiography. Cardiol Res 2014; 5:118-120. [PMID: 28348708 PMCID: PMC5358173 DOI: 10.14740/cr341w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2014] [Indexed: 11/17/2022] Open
Abstract
We have described a myocardial infarct scar identified by a standard dual source CT coronary angiography (CTCA). We were able to detect the scar during the routine coronary assessment without contrast late enhancement and without additional radiation exposure. It is therefore feasible to assess chronic scar using a standard CTCA technique.
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Affiliation(s)
- Anand Jeevarethinam
- Clinical Imaging and Research Centre, Wellington Hospital, Wellington Place, St. Johns Wood, London NW8 9LE, UK; Institute of Cardiovascular Science, University College London, London, UK
| | - Shreenidhi Venuraju
- Clinical Imaging and Research Centre, Wellington Hospital, Wellington Place, St. Johns Wood, London NW8 9LE, UK
| | | | - Satvir Atwal
- Clinical Imaging and Research Centre, Wellington Hospital, Wellington Place, St. Johns Wood, London NW8 9LE, UK
| | - Usha Raval
- Clinical Imaging and Research Centre, Wellington Hospital, Wellington Place, St. Johns Wood, London NW8 9LE, UK
| | | | | | - Avijit Lahiri
- Clinical Imaging and Research Centre, Wellington Hospital, Wellington Place, St. Johns Wood, London NW8 9LE, UK; Imperial College, London, UK; Middlesex University, London, UK
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Stevens SM, Tung R, Rashid S, Gima J, Cote S, Pavez G, Khan S, Ennis DB, Finn JP, Boyle N, Shivkumar K, Hu P. Device artifact reduction for magnetic resonance imaging of patients with implantable cardioverter-defibrillators and ventricular tachycardia: late gadolinium enhancement correlation with electroanatomic mapping. Heart Rhythm 2014; 11:289-98. [PMID: 24140812 PMCID: PMC3946910 DOI: 10.1016/j.hrthm.2013.10.032] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Indexed: 01/08/2023]
Abstract
BACKGROUND Late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) of ventricular scar has been shown to be accurate for detection and characterization of arrhythmia substrates. However, the majority of patients referred for ventricular tachycardia (VT) ablation have an implantable cardioverter-defibrillator (ICD), which obscures image integrity and the clinical utility of MRI. OBJECTIVE The purpose of this study was to develop and validate a wideband LGE MRI technique for device artifact removal. METHODS A novel wideband LGE MRI technique was developed to allow for improved scar evaluation on patients with ICDs. The wideband technique and the standard LGE MRI were tested on 18 patients with ICDs. VT ablation was performed in 13 of 18 patients with either endocardial and/or epicardial approach and the correlation between the scar identified on MRI and electroanatomic mapping (EAM) was analyzed. RESULTS Hyperintensity artifact was present in 16 of 18 of patients using standard MRI, which was eliminated using the wideband LGE and allowed for MRI interpretation in 15 of 16 patients. All patients had ICD lead characteristics confirmed as unchanged post-MRI and had no adverse events. LGE scar was seen in 11 of 18 patients. Among the 15 patients in whom wideband LGE allowed visualization of myocardium, 10 had LGE scar and 5 had normal myocardium in the regions with image artifacts when using the standard LGE. The left ventricular scar size measurements using wideband MRI and EAM were correlated with R(2) = 0.83 and P = .00003. CONCLUSION Wideband LGE MRI improves the ability to visualize myocardium for clinical interpretation, which correlated well with EAM findings during VT ablation.
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Affiliation(s)
- Steven M Stevens
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Roderick Tung
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Shams Rashid
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California
| | - Jean Gima
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Shelly Cote
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Geraldine Pavez
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Sarah Khan
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California
| | - Daniel B Ennis
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California
| | - J Paul Finn
- Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California
| | - Noel Boyle
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Kalyanam Shivkumar
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California; Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California
| | - Peng Hu
- UCLA Cardiac Arrhythmia Center, UCLA Health System, David Geffen School of Medicine at UCLA, Los Angeles, California; Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California.
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