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Manzoor S, Kane MS, Grenett M, Oh JY, Pat B, Lewis C, Davies JE, Steele C, Patel RP, Dell'Italia LJ. Elevated cardiac hemoglobin expression is associated with a pro-oxidative and inflammatory environment in primary mitral regurgitation. Free Radic Biol Med 2023; 208:126-133. [PMID: 37543167 DOI: 10.1016/j.freeradbiomed.2023.08.007] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/07/2023]
Abstract
BACKGROUND Primary mitral regurgitation (PMR) is associated with oxidative and inflammatory myocardial damage. We reported greater exosome hemoglobin (Hb) in pericardial fluid (PCF) versus plasma, suggesting a cardiac source of Hb. OBJECTIVE Test the hypothesis that Hb is produced in the PMR heart and is associated with increased inflammation. METHODS AND RESULTS Hb gene expression for subunits alpha (HBA) and beta (HBB) was assessed in right atria (RA), left atria (LA) and left ventricular (LV) tissue from donor hearts (n = 10) and PMR patient biopsies at surgery (n = 11). PMR patients (n = 22) had PCF and blood collected for macrophage markers, pro-inflammatory cytokines, and matrix metalloproteinases (MMPs). In-situ hybridization for HBA mRNA and immunohistochemistry for Hb-alpha (Hbα) and Hb-beta (Hbβ) protein was performed on PMR tissue. RESULTS HBA and HBB genes are significantly increased (>4-fold) in RA, LA, and LV in PMR vs. normal hearts. In PMR tissue, HBA mRNA is expressed in both LV cardiomyocytes and interstitial cells by in-situ hybridization; however, Hbα and Hbβ protein is only expressed in interstitial cells by immunohistochemistry. PCF oxyHb is significantly increased over plasma along with low ratios (<1.0) of haptoglobin:oxyHb and hemopexin:heme supporting a highly oxidative environment. Macrophage chemotactic protein-1, tumor necrosis factor-α, interleukin-6, and MMPs are significantly higher in PCF vs. plasma. CONCLUSION There is increased Hb production in the PMR heart coupled with the inflammatory state of the heart, suggests a myocardial vulnerability of further Hb delivery and/or production during cardiac surgery that could adversely affect LV functional recovery.
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Affiliation(s)
- Shajer Manzoor
- Department of Medicine, Division of Cardiology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA
| | - Mariame Selma Kane
- Department of Medicine, Division of Cardiology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA; Birmingham Veterans Affairs Health Care System, Birmingham, AL, USA
| | - Maximiliano Grenett
- Department of Medicine, Division of Cardiology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA; Birmingham Veterans Affairs Health Care System, Birmingham, AL, USA
| | - Joo-Yeun Oh
- Department of Medicine, Division of Cardiology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA; Birmingham Veterans Affairs Health Care System, Birmingham, AL, USA
| | - Betty Pat
- Department of Medicine, Division of Cardiology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA; Birmingham Veterans Affairs Health Care System, Birmingham, AL, USA
| | - Clifton Lewis
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery, UAB, USA
| | - James E Davies
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery, UAB, USA
| | - Chad Steele
- Department of Microbiology and Immunology, Tulane University, New Orleans, LA, USA
| | - Rakesh P Patel
- Department of Pathology and Center for Free Radical Biology, UAB, USA
| | - Louis J Dell'Italia
- Department of Medicine, Division of Cardiology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA; Birmingham Veterans Affairs Health Care System, Birmingham, AL, USA.
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Abstract
Primary mitral regurgitation is a frequent etiology of congestive heart failure and is best treated with intervention when patients are symptomatic or when additional risk factors exist. Surgical intervention improves outcomes in appropriately selected patients. However, for those at high surgical risk, transcatheter intervention provides less invasive repair and replacement options while providing comparable outcomes to surgery. The excess mortality and high prevalence of heart failure in untreated mitral regurgitation illuminate the need for further developments in mitral valve intervention ideally fulfilled by expanding these types of procedures and eligibility to these procedures beyond only those at high surgical risk.
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Affiliation(s)
- Brody Slostad
- Bluhm Cardiovascular Institute, Northwestern University, 675 North St Clair Street Ste 19-100, Galter Pavilion, Chicago, IL 60611, USA
| | - Gloria Ayuba
- Bluhm Cardiovascular Institute, Northwestern University, 675 North St Clair Street Ste 19-100, Galter Pavilion, Chicago, IL 60611, USA
| | - Jyothy J Puthumana
- Bluhm Cardiovascular Institute, Northwestern University, 675 North St Clair Street Ste 19-100, Galter Pavilion, Chicago, IL 60611, USA.
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3
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Altes A, Bernard J, Dumortier H, Dupuis M, Toubal O, Mahjoub H, Tartar J, Côté N, Clavel MA, O'Connor K, Bernier M, Beaudoin J, Vincentelli A, Pibarot P, Maréchaux S. Clinical significance of myocardial contraction fraction in significant primary mitral regurgitation. Arch Cardiovasc Dis 2023; 116:151-158. [PMID: 36805238 DOI: 10.1016/j.acvd.2023.01.004] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 02/08/2023]
Abstract
BACKGROUND The optimal timing for mitral valve (MV) surgery in asymptomatic patients with primary mitral regurgitation (MR) remains a matter of debate. Myocardial contraction fraction (MCF) - the ratio of the left ventricular (LV) stroke volume to that of the myocardial volume - is a volumetric measure of LV myocardial shortening independent of size or geometry. AIM To assess the relationship between MCF and outcome in patients with significant chronic primary MR due to prolapse managed in contemporary practice. METHODS Clinical, Doppler-echocardiographic and outcome data prospectively collected in 174 patients (mean age 62 years, 27% women) with significant primary MR and no or mild symptoms were analysed. The impact of MCF< or ≥30% on cardiac events (cardiovascular death, acute heart failure or MV surgery) was studied. RESULTS During an estimated median follow-up of 49 (22-77) months, cardiac events occurred in 115 (66%) patients. The 4-year estimates of survival free from cardiac events were 21±5% for patients with MCF <30% and 40±6% for those with ≥30% (P<0.001). MCF <30% was associated with a considerable increased risk of cardiac events after adjustment for established clinical risk factors, MR severity and current recommended class I triggers for MV surgery (adjusted hazard ratio: 2.33, 95% confidence interval: 1.51-3.58; P<0.001). Moreover, MCF<30% improved the predictive performance of models, with better global fit, reclassification and discrimination. CONCLUSIONS MCF<30% is strongly associated with occurrence of cardiac events in patients with significant primary MR due to prolapse. Further studies are needed to assess the direct impact of MCF on patient management and outcomes.
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Affiliation(s)
- Alexandre Altes
- GCS-Groupement des Hôpitaux de l'Institut Catholique de Lille/ Lille Catholic hospitals, Heart Valve Center, Cardiology Department, ETHICS EA 7446, Lille Catholic University, Lille, France
| | - Jérémy Bernard
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Hélène Dumortier
- GCS-Groupement des Hôpitaux de l'Institut Catholique de Lille/ Lille Catholic hospitals, Heart Valve Center, Cardiology Department, ETHICS EA 7446, Lille Catholic University, Lille, France
| | - Marlène Dupuis
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Oumhani Toubal
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Haïfa Mahjoub
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Jean Tartar
- GCS-Groupement des Hôpitaux de l'Institut Catholique de Lille/ Lille Catholic hospitals, Heart Valve Center, Cardiology Department, ETHICS EA 7446, Lille Catholic University, Lille, France
| | - Nancy Côté
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Marie-Annick Clavel
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Kim O'Connor
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Mathieu Bernier
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Jonathan Beaudoin
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - André Vincentelli
- Cardiac Surgery Department, Centre Hospitalier Régional et Universitaire de Lille, 59000 Lille, France
| | - Philippe Pibarot
- Institut universitaire de cardiologie et de pneumologie de Québec / Québec Heart & Lung Institute, Laval University, Québec City QC G1V 4G5, Québec, Canada
| | - Sylvestre Maréchaux
- GCS-Groupement des Hôpitaux de l'Institut Catholique de Lille/ Lille Catholic hospitals, Heart Valve Center, Cardiology Department, ETHICS EA 7446, Lille Catholic University, Lille, France.
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4
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Ueyama H, Kuno T, Takagi H, Krishnamoorthy P, Prandi FR, Palazzuoli A, Sharma SK, Kini A, Lerakis S. Prognostic value of left ventricular global longitudinal strain in mitral regurgitation: a systematic review. Heart Fail Rev 2023; 28:465-483. [PMID: 35900680 DOI: 10.1007/s10741-022-10265-3] [Citation(s) in RCA: 3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/19/2022] [Indexed: 11/04/2022]
Abstract
Conventional echocardiographic assessment may overestimate the left ventricular (LV) function in mitral regurgitation (MR). LV global longitudinal strain (GLS) is more sensitive marker to detect subclinical LV dysfunction. Multiple studies have investigated the prognostic value of LV-GLS in MR to examine its potential to determine the timing and indication of intervention. This systematic review aimed to assess the prognostic value of LV-GLS in patients with mitral regurgitation (MR) to define its clinical applicability. PUBMED and EMBASE were queried through July 2021 to identify studies investigating the prognostic value of LV-GLS in MR. A total of 24 observational studies with 5267 patients were identified. Sixteen studies investigated for primary MR, 7 studies for secondary MR, and 1 study for both. Most studies included patients who underwent intervention. There was significant heterogeneity in patient population, intervention status, follow-up period, LV-GLS cutoff value, outcomes, and statistical methods among the studies. Meta-analysis was not performed considering the significant variability. With exception to 1 study, all studies demonstrated significant association between impaired LV-GLS and worse clinical and echocardiographic outcomes in primary MR. Prognostic value of LV-GLS in secondary MR was less certain due to inconsistent findings and limited reporting. LV-GLS is a promising parameter of prognostication in primary MR and can be considered as alternative to determine the timing of intervention. However, the optimal cutoff value remains unclear. The prognostic value of LV-GLS in secondary MR is less clear. Further large-scale prospective study is warranted before its routine clinical application.
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Affiliation(s)
- Hiroki Ueyama
- Department of Medicine, Icahn School of Medicine at Mount Sinai, Mount Sinai Beth Israel, New York, NY, USA.,Division of Cardiology, Icahn School of Medicine at Mount Sinai, Mount Sinai Hospital, One Gustave L. Levy Place, New York, NY, 10029, USA
| | - Toshiki Kuno
- Department of Cardiology, Montefiore Medical Center, Albert Einstein Medical College, New York, NY, USA
| | - Hisato Takagi
- Division of Cardiovascular Surgery, Shizuoka Medical Center, Shizuoka, Japan
| | - Parasuram Krishnamoorthy
- Division of Cardiology, Icahn School of Medicine at Mount Sinai, Mount Sinai Hospital, One Gustave L. Levy Place, New York, NY, 10029, USA
| | - Francesca Romana Prandi
- Division of Cardiology, Icahn School of Medicine at Mount Sinai, Mount Sinai Hospital, One Gustave L. Levy Place, New York, NY, 10029, USA
| | - Alberto Palazzuoli
- Cardiovascular Diseases Unit, Cardio-Throacic and Vascular, Department S. Maria Alle Scotte Hospital, University of Siena, Siena, Italy
| | - Samin K Sharma
- Division of Cardiology, Icahn School of Medicine at Mount Sinai, Mount Sinai Hospital, One Gustave L. Levy Place, New York, NY, 10029, USA
| | - Annapoorna Kini
- Division of Cardiology, Icahn School of Medicine at Mount Sinai, Mount Sinai Hospital, One Gustave L. Levy Place, New York, NY, 10029, USA
| | - Stamatios Lerakis
- Division of Cardiology, Icahn School of Medicine at Mount Sinai, Mount Sinai Hospital, One Gustave L. Levy Place, New York, NY, 10029, USA.
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Bernard J, Altes A, Dupuis M, Toubal O, Mahjoub H, Tastet L, Côté N, Clavel MA, Dumortier H, Tartar J, O'Connor K, Bernier M, Beaudoin J, Maréchaux S, Pibarot P. Cardiac Damage Staging Classification in Asymptomatic Moderate or Severe Primary Mitral Regurgitation. Struct Heart 2022; 6:100004. [PMID: 37273475 PMCID: PMC10236891 DOI: 10.1016/j.shj.2022.100004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 11/09/2021] [Accepted: 12/13/2021] [Indexed: 06/06/2023]
Abstract
Background Optimal timing for intervention remains uncertain in asymptomatic patients with primary mitral regurgitation (MR). We aimed to assess the prognostic value of a new cardiac damage staging classification in patients with asymptomatic moderate or severe primary MR. Methods Clinical, Doppler-echocardiographic, and outcome data prospectively collected in 338 asymptomatic patients (64 ± 15 years, 68% men) with at least moderate primary MR were retrospectively analyzed. Patients were hierarchically classified as per the following staging classification: no cardiac damage (stage 0), mild left ventricular or left atrial damage (stage 1), moderate or severe left ventricular or left atrial damage (stage 2), pulmonary vasculature or tricuspid valve damage (stage 3), or right ventricular damage (stage 4). Results There was a stepwise increase in 10-year mortality rates as per cardiac damage stage: 20.0% in stage 0, 25.6% in stage 1, 31.5% in stage 2, and 61.3% in stage 3-4 (p < 0.001). The staging classification was significantly associated with increased risk of mortality (hazard ratio = 1.41 per one-stage increase, 95% confidence interval: 1.07-1.85, p = 0.015) and the composite of cardiovascular mortality or hospitalization (hazard ratio = 1.51 per one-stage increase, 95% confidence interval: 1.07-2.15, p = 0.020) in multivariable analysis adjusted for EuroSCORE II, mitral valve intervention as a time-dependent variable, and other risk factors. The proposed scheme showed incremental value over several clinical variables (net reclassification index = 0.40, p = 0.03). Conclusions The new staging classification provides independent and incremental prognostic value in patients with asymptomatic moderate or severe MR.
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Affiliation(s)
- Jérémy Bernard
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Alexandre Altes
- Department of Cardiology, Institut Catholique de Lille / Catholic Institute of Lille, Université Catholique de Lille / Catholic University of Lille, Lille France
| | - Marlène Dupuis
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Oumhani Toubal
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Haïfa Mahjoub
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Lionel Tastet
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Nancy Côté
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Marie-Annick Clavel
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Hélène Dumortier
- Department of Cardiology, Institut Catholique de Lille / Catholic Institute of Lille, Université Catholique de Lille / Catholic University of Lille, Lille France
| | - Jean Tartar
- Department of Cardiology, Institut Catholique de Lille / Catholic Institute of Lille, Université Catholique de Lille / Catholic University of Lille, Lille France
| | - Kim O'Connor
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Mathieu Bernier
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Jonathan Beaudoin
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
| | - Sylvestre Maréchaux
- Department of Cardiology, Institut Catholique de Lille / Catholic Institute of Lille, Université Catholique de Lille / Catholic University of Lille, Lille France
| | - Philippe Pibarot
- Institut universitaire de cardiologie et de pneumologie de Québec/Québec Heart & Lung Institute, Université Laval / Laval University, Québec City, Québec, Canada
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6
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Kadoglou NPE, Papadopoulos CH, Krommydas A. The prognostic value of exercise-induced pulmonary hypertension in asymptomatic patients with primary mitral regurgitation. J Cardiol 2021; 79:306-310. [PMID: 34674917 DOI: 10.1016/j.jjcc.2021.09.016] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND We examined whether the early development of exercise-induced pulmonary hypertension (EIPH) and right ventricular dysfunction during exercise stress echocardiography (ESE) may predict clinical deterioration in so-called "asymptomatic" patients with primary, at least moderate mitral regurgitation (MR). METHODS 79 consecutive patients underwent a symptom-limited, graded ESE protocol on semi-supine bicycle at the beginning of the study. During the test, we assessed symptom development, test duration, and the following echocardiographic parameters: MR severity, maximum velocity of the tricuspid regurgitation jet (TR Vmax), pulmonary artery systolic pressure (PASP), and tricuspid annulus systolic excursion (TAPSE). All patients were then followed-up for at least 12 months for clinical end-points (heart failure-related symptoms requiring pharmaceutical therapy, heart failure hospitalization, and/or mitral valve surgery in case of refractory symptoms). RESULTS After 16 ± 4 months of follow-up, 75 patients completed the study; 26 of them achieved any clinical end-point and were classified as 'high-risk', while the rest (49 patients) were assigned to the 'low-risk' group. High-risk group showed significantly higher exercise-induced TR Vmax and PASP levels at maximum workload of ESE than low-risk counterparts (p<0.001). Based on receiver operating characteristic analysis, the early (within the first two stages of ESE or up to 50 W) steep rise of calculated PASP ≥51 mmHg (TR Vmax ≥3.4 m/s) had a 92.3% sensitivity and 100% specificity to predict clinical deterioration within the following year. That cut-off value seemed superior predictor than peak value of PASP at the end of ESE. TAPSE levels during ESE did not add prognostic value in our sample. CONCLUSION This is the first study demonstrating that the early development of EIPH has prognostic value in asymptomatic patients with primary at least moderate MR and may become a new valid determinant of mitral valve surgery. Additional larger prospective studies are needed to validate our findings.
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Affiliation(s)
- Nikolaos P E Kadoglou
- Medical School, University of Cyprus, 215/6 Old road Lefkosias-Lemesou, CY, Aglantzia, Nicosia 2029, Cyprus.
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7
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Jensen JK, Poulsen SH. Left atrial systolic function by strain analysis - A new useful prognostic tool in primary severe mitral regurgitation? Int J Cardiol 2020; 322:204-205. [PMID: 33035613 DOI: 10.1016/j.ijcard.2020.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 11/20/2022]
Affiliation(s)
- Jesper K Jensen
- Department of Cardiology, Aarhus University Hospital, Denmark.
| | - Steen H Poulsen
- Department of Cardiology, Aarhus University Hospital, Denmark
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8
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Uretsky S, Argulian E, Supariwala A, Marcoff L, Koulogiannis K, Aldaia L, Chaudhry FA, Wolff SD, Gillam LD. A Comparative Assessment of Echocardiographic Parameters for Determining Primary Mitral Regurgitation Severity Using Magnetic Resonance Imaging as a Reference Standard. J Am Soc Echocardiogr 2018; 31:992-9. [PMID: 29921479 DOI: 10.1016/j.echo.2018.04.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 12/07/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND The American Society of Echocardiography (ASE) guidelines suggest the use of several echocardiographic methods to assess mitral regurgitation severity using an integrated approach, without guidance as to the weighting of each parameter. The purpose of this multicenter prospective study was to evaluate the recommended echocardiographic parameters against a reference modality and develop and validate a weighting for each echocardiographic measure of mitral regurgitation severity. METHODS This study included 112 patients who underwent evaluation with echocardiography and magnetic resonance imaging (MRI). Echocardiographic parameters recommended by the ASE were included and compared with MRI-derived regurgitant volume (MRI-RV). RESULTS Echocardiographic parameters that correlated best with MRI-RV were proximal isovelocity surface area (PISA) radius (r = 0.65, P < .0001), PISA-derived effective regurgitant orifice area (r = 0.65, P < .0001), left ventricular end-diastolic volume (r = 0.56, P < .0001), and PISA-derived regurgitant volume (r = 0.52, P < .0001). In the linear regression models PISA-derived effective regurgitant orifice area, PISA-derived regurgitant volume, left ventricular end-diastolic volume, and the presence of a flail leaflet independently predicted MRI-RV. CONCLUSION Echocardiographic parameters of mitral regurgitation as recommended by the ASE had moderate correlations with MRI-RV. The best predictors of MRI-RV were PISA-derived effective regurgitant orifice area, PISA-derived regurgitant volume, left ventricular end-diastolic volume, and the presence of a flail leaflet, suggesting that these parameters should be weighted more heavily than other echocardiographic parameters in the application of the ASE-recommended integrated approach.
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9
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Liu B, Edwards NC, Neal DAH, Weston C, Nash G, Nikolaidis N, Barker T, Patel R, Bhabra M, Steeds RP. A prospective study examining the role of myocardial Fibrosis in outcome following mitral valve repair IN DEgenerative mitral Regurgitation: rationale and design of the mitral FINDER study. BMC Cardiovasc Disord 2017; 17:282. [PMID: 29166877 PMCID: PMC5700678 DOI: 10.1186/s12872-017-0715-y] [Citation(s) in RCA: 8] [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] [Received: 09/08/2017] [Accepted: 11/12/2017] [Indexed: 02/04/2023] Open
Abstract
Background The optimal management of chronic severe primary degenerative mitral regurgitation (MR) is to repair the valve but identification of the optimal timing of surgery remains challenging. Current guidelines suggest ‘watchful waiting’ until the onset of symptoms or left ventricular (LV) dysfunction but these have been challenged as promoting ‘rescue surgery’. Better predictors are required to inform decision-making in relation to the necessity and timing of surgery. Chronic volume overload is a stimulus for adverse adaptive LV remodelling. Subclinical reduction in LV strain before mitral repair predicts a fall in LV ejection fraction following surgery and is thought to reflect the development of myocardial fibrosis in response to chronic volume overload. Myocardial fibrosis can be detected non-invasively using cardiac magnetic resonance (CMR) imaging techniques as an expansion of the extracellular volume (ECV). Methods/design This study investigates whether: 1) patients with above median ECV will have smaller reduction in end-systolic volume index (as a measure of the degree of reverse LV remodelling) on CMR following mitral valve repair, compared to those with below median ECV; and 2) higher ECV on CMR, validated through histology, adversely impacts upon post-operative complications and symptomatic improvement following surgery. This is a multi-centre, prospective, cross-sectional comparison of patients prior to and 9 months following surgery for chronic severe primary degenerative MR. To establish the natural history of ECV in MR, an additional cohort of patients with asymptomatic MR who do not wish to consider early repair will be followed. Investigations include CMR, cardiopulmonary exercise test, stress echocardiography, signal-averaged electrocardiogram, 24-h electrocardiogram monitoring, laboratory tests and patient-reported outcome measures. Patients undergoing surgery will have cardiac biopsies performed at the time of mitral valve repair for histological quantification of fibrosis. Discussion This study will advance our understanding of ventricular remodelling in MR, its impact on patient symptoms and ventricular response following surgery. Establishing the link between myocardial fibrosis (measured on CMR and validated through histology), with early ventricular dysfunction, will offer physicians a novel non-invasive biomarker that can further inform the timing of surgery. Trial registration This trial was registered at ClinicalTrials.gov (NCT02355418) on 30th November 2015.
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Affiliation(s)
- Boyang Liu
- University Hospital Birmingham NHS Foundation Trust, Birmingham, UK. .,Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK.
| | - Nicola C Edwards
- University Hospital Birmingham NHS Foundation Trust, Birmingham, UK.,Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Desley A H Neal
- University Hospital Birmingham NHS Foundation Trust, Birmingham, UK
| | - Christopher Weston
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Gerard Nash
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | | | - Thomas Barker
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Ramesh Patel
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Moninder Bhabra
- University Hospital Birmingham NHS Foundation Trust, Birmingham, UK
| | - Richard P Steeds
- University Hospital Birmingham NHS Foundation Trust, Birmingham, UK.,Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
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10
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Dulgheru R, Marchetta S, Sugimoto T, Go YY, Girbea A, Oury C, Lancellotti P. Exercise Testing in Mitral Regurgitation. Prog Cardiovasc Dis 2017; 60:342-350. [PMID: 29128571 DOI: 10.1016/j.pcad.2017.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 10/29/2017] [Accepted: 10/29/2017] [Indexed: 12/29/2022]
Abstract
Mitral regurgitation (MR) is the second most common valvular heart disease referred for corrective surgery. Diagnostic and management dilemmas are not uncommon when dealing with MR patients. Exercise testing plays an important role in sorting out some of these clinical challenges. In primary asymptomatic MR, exercise testing allows symptom assessment, confident link of symptoms to valve disease severity, safe deferral of surgery for the next 1-year in patients with preserved exercise capacity, insights into the mechanism of exercise-induced dyspnea and helps in individual risk stratification. Moreover, exercise testing in the form of exercise stress echocardiography is also useful in the evaluation of patients with secondary ischemic MR for risk stratification as well as for the detection of patients with moderate ischemic MR in whom mitral valve repair at the time of surgical revascularization may add benefit.
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Affiliation(s)
- Raluca Dulgheru
- University of Liège Hospital, Department of Cardiology, Heart Valve Clinic, Liège, Belgium
| | - Stella Marchetta
- University of Liège Hospital, Department of Cardiology, Heart Valve Clinic, Liège, Belgium
| | - Tadafumi Sugimoto
- University of Liège Hospital, Department of Cardiology, Heart Valve Clinic, Liège, Belgium
| | - Yun Yun Go
- National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore
| | - Alexandra Girbea
- University of Liège Hospital, Department of Cardiology, Heart Valve Clinic, Liège, Belgium
| | - Cécile Oury
- GIGA Cardiovascular Sciences, University Hospital Sart Tilman, Liège, Belgium
| | - Patrizio Lancellotti
- University of Liège Hospital, Department of Cardiology, Heart Valve Clinic, Liège, Belgium; GIGA Cardiovascular Sciences, University Hospital Sart Tilman, Liège, Belgium; Gruppo Villa Maria Care and Research, Anthea Hospital, Bari, Italy.
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