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Minderhoud SCS, van Montfoort R, Meijs TA, Korteland SA, Bruse JL, Kardys I, Wentzel JJ, Voskuil M, Hirsch A, Roos-Hesselink JW, van den Bosch AE. Aortic geometry and long-term outcome in patients with a repaired coarctation. Open Heart 2024; 11:e002642. [PMID: 38806222 DOI: 10.1136/openhrt-2024-002642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 05/15/2024] [Indexed: 05/30/2024] Open
Abstract
OBJECTIVE This study aims to compare aortic morphology between repaired coarctation patients and controls, and to identify aortic morphological risk factors for hypertension and cardiovascular events (CVEs) in coarctation patients. METHODS Repaired coarctation patients with computed tomography angiography (CTA) or magnetic resonance angiography (MRA) were included, followed-up and compared with sex-matched and age-matched controls. Three-dimensional aortic shape was reconstructed using patients' CTA or MRA, or four-dimensional flow cardiovascular magnetic resonance in controls, and advanced geometrical characteristics were calculated and visualised using statistical shape modelling. In patients, we examined the association of geometrical characteristics with (1) baseline hypertension, using multivariable logistic regression; and (2) cardiovascular events (CVE, composite of aortic complications, coronary artery disease, ventricular arrhythmias, heart failure hospitalisation, stroke, transient ischaemic attacks and cardiovascular death), using multivariable Cox regression. The least absolute shrinkage and selection operator (LASSO) method selected the most informative multivariable model. RESULTS Sixty-five repaired coarctation patients (23 years (IQR 19-38)) were included, of which 44 (68%) patients were hypertensive at baseline. After a median follow-up of 8.7 years (IQR 4.8-15.4), 27 CVEs occurred in 20 patients. Aortic arch dimensions were smaller in patients compared with controls (diameter p<0.001, wall surface area p=0.026, volume p=0.007). Patients had more aortic arch torsion (p<0.001) and a higher curvature (p<0.001). No geometrical characteristics were associated with hypertension. LASSO selected left ventricular mass, male sex, tortuosity and age for the multivariable model. Left ventricular mass (p=0.014) was independently associated with CVE, and aortic tortuosity showed a trend towards significance (p=0.070). CONCLUSION Repaired coarctation patients have a smaller aortic arch and a more tortuous course of the aorta compared with controls. Besides left ventricular mass index, geometrical features might be of importance in long-term risk assessment in coarctation patients.
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Affiliation(s)
- Savine C S Minderhoud
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Rick van Montfoort
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Timion A Meijs
- Department of Cardiology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Suze-Anne Korteland
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Jan L Bruse
- Vicomtech Foundation, Basque Research and Technology Alliance, Donostia-San Sebastián, Spain
| | - Isabella Kardys
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Jolanda J Wentzel
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Michiel Voskuil
- Department of Cardiology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Alexander Hirsch
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
- Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
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Mandell JG, Romanowicz J, Loke YH, Ikeda N, Pena E, Siddiqi U, Hibino N, Alexander ME, Powell AJ, Olivieri LJ. Aortic arch shape after arch repair predicts exercise capacity: a multicentre analysis. EUROPEAN HEART JOURNAL OPEN 2024; 4:oead138. [PMID: 38223303 PMCID: PMC10786438 DOI: 10.1093/ehjopen/oead138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 12/12/2023] [Accepted: 12/18/2023] [Indexed: 01/16/2024]
Abstract
Aims Coarctation of the aorta is associated with long-term morbidity including decreased exercise capacity, despite successful repair. In the absence of discrete recoarctation, the haemodynamic mechanism remains unknown. This multicentre study evaluated the relationship between aorta shape, flow, and exercise capacity in patients after arch repair, specifically through the lens of aortic size mismatch and descending aortic (DAo) flow and their association with exercise. Methods and results Cardiac magnetic resonance, cardiopulmonary exercise test, and echocardiogram data within 1 year were analysed from 58 patients (age 28 ± 10 years, 48% male) across four centres with history of isolated arch repair. Aortic arch measurements were correlated with % predicted VO2max with subgroup analyses of those with residual arch obstruction, bicuspid aortic valve, and hypertension. Ascending aorta (AAo) to DAo diameter ratio (DAAo/DDAo) was negatively correlated with % predicted VO2max. %DAo flow positively correlated with VO2max. Sub-analyses demonstrated that the negative correlation of DAAo/DDAo with VO2max was maintained only in patients without arch obstruction and with a bicuspid aortic valve. Smaller aortic arch measurements were associated with both hypertension and exercise-induced hypertension. Conclusion Aorta size mismatch, due to AAo dilation or small DAo, and associated decreased %DAo flow, correlated significantly with decreased exercise capacity after aortic arch repair. These correlations were stronger in patients without arch obstruction and with a bicuspid aortic valve. Aorta size mismatch and %DAo flow capture multiple mechanisms of altered haemodynamics beyond blood pressure gradient or discrete obstruction and can inform the definition of a successful repair.
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Affiliation(s)
- Jason G Mandell
- Division of Pediatric Cardiology, University of Rochester Medical Center, Golisano Children’s Hospital, 601 Elmwood Avenue, Box 631, Rochester, NY 14642, USA
| | - Jennifer Romanowicz
- Department of Cardiology, Boston Children’s Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Yue-Hin Loke
- Division of Pediatric Cardiology, Children’s National Hospital, Washington, DC, USA
| | - Nobuyuki Ikeda
- Division of Cardiology, Advocate Children’s Hospital, Oak Lawn, IL, USA
| | - Emily Pena
- Division of Cardiology, Advocate Children’s Hospital, Oak Lawn, IL, USA
| | - Umar Siddiqi
- Section of Cardiac Surgery, Department of Surgery, University of Chicago Medical Center, Chicago, IL, USA
| | - Narutoshi Hibino
- Section of Cardiac Surgery, Department of Surgery, University of Chicago Medical Center, Chicago, IL, USA
- Department of Cardiovascular Surgery, Advocate Children’s Hospital, Oak Lawn, IL, USA
| | - Mark E Alexander
- Department of Cardiology, Boston Children’s Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Andrew J Powell
- Department of Cardiology, Boston Children’s Hospital, Boston, MA, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
| | - Laura J Olivieri
- Department of Pediatric Cardiology, University of Pittsburgh Medical Center, Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
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Recco DP, Kizilski SB, Ghosh RM, Piekarski B, Prakash A, Hoganson DM. Aortic growth after arch reconstruction with patch augmentation: a 2-decade experience. INTERDISCIPLINARY CARDIOVASCULAR AND THORACIC SURGERY 2023; 37:ivad210. [PMID: 38134426 PMCID: PMC10752579 DOI: 10.1093/icvts/ivad210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/06/2023] [Accepted: 12/20/2023] [Indexed: 12/24/2023]
Abstract
OBJECTIVES Optimal aortic sizing during aortic arch reconstruction remains unknown. Negative effects of arch under- or oversizing are well-published. We aimed to characterize longitudinal aortic growth after patch-augmented arch reconstruction to identify the initial reconstructed arch size that results in normal mid-term arch dimensions. METHODS Single-centre, retrospective review of infants undergoing Damus-Kaye-Stansel (DKS) or non-DKS patch-augmented aortic arch reconstruction between 2000 and 2021. Ascending aorta, proximal and distal transverse arch, aortic isthmus (AIsth) and descending aorta dimensions were measured in postoperative echocardiograms (<3 months from index operation) and cross-sectional imaging (>12 months). Longitudinal changes to aortic dimensions and z-scores were analysed. Secondary outcomes included reintervention, valve and ventricular function, mortality and transplantation. RESULTS Fifty-four patients (16 DKS, 38 non-DKS) were included. At 6.3 [2.2, 12.0]-year follow-up, all aortic segments grew significantly in both groups, while z-scores remained unchanged except for non-DKS proximal and distal transverse arch z-scores, which significantly increased (P < 0.05 each). When stratified by initial postoperative z-score (z < -1, -1 ≤ z ≤ 1, z > 1), non-DKS patients with initial AIsth z-score <-1 had a final z-score significantly smaller than both the targeted z-score zero (P = 0.014) and final z-score in a group with initial postoperative z-score ±1 (P = 0.009). Valve and ventricular function remained stable. Eighteen patients required reintervention, 1 died and 1 underwent transplant. CONCLUSIONS Over mid-term follow-up, aortic growth after arch reconstruction with patch augmentation was proportional when repaired to normal z-score dimensions, aside from proximal transverse arch, which disproportionately dilated. AIsth undersizing prevailed mid-term and trended towards a higher reintervention rate. Initial reconstruction between z-score 0 and +1 resulted in maintenance of that z-score size at mid-term follow-up. Overall, it is crucial to achieve targeted aortic sizing at index operation to maintain appropriate aortic dimensions over time and reduce reintervention risk with specific focus on the AIsth.
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Affiliation(s)
- Dominic P Recco
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Shannen B Kizilski
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Reena M Ghosh
- Harvard Medical School, Boston, MA, USA
- Department of Cardiology, Boston Children’s Hospital, Boston, MA, USA
| | - Breanna Piekarski
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, USA
| | - Ashwin Prakash
- Harvard Medical School, Boston, MA, USA
- Department of Cardiology, Boston Children’s Hospital, Boston, MA, USA
| | - David M Hoganson
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
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Saunders T, Recco D, Kneier N, Kizilski S, Hammer P, Hoganson D. Validation of a laser projection platform for the preparation of surgical patches used in paediatric cardiac surgery. INTERDISCIPLINARY CARDIOVASCULAR AND THORACIC SURGERY 2023; 37:ivad129. [PMID: 37555820 DOI: 10.1093/icvts/ivad129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 07/18/2023] [Accepted: 08/07/2023] [Indexed: 08/10/2023]
Abstract
OBJECTIVES Reconstruction of cardiovascular anatomy with patch material is integral to the repair of congenital heart disease. We present validation of a laser projection platform for the preparation of surgical patches as a proof-of-concept for intraoperative use in patient-specific planning of paediatric cardiac surgery reconstructions. METHODS The MicroLASERGUIDE, a compact laser projection system that displays computer-aided designs onto 2D/3D surfaces, serves as an alternative to physical templates. A non-inferiority comparison of dimensional measurements was conducted between laser projection ('laser') and OZAKI AVNeo Template ('template') methods in creation of 51 (each group) size 13 valve leaflets from unfixed bovine pericardium. A digital version of the OZAKI AVNeo Template dimensions served as control. Feasibility testing was performed with other common patch materials (fixed bovine pericardium, PTFE and porcine main pulmonary artery as a substitute for pulmonary homograft) and sizes (13, 23) (n = 3 each group). RESULTS Compared to control (height 21.5, length 21.0 mm), template height and length were smaller (height and length differences of -0.3 [-0.5 to 0.0] and -0.4 [-0.8 to -0.1] mm, P < 0.01 each); whereas, both laser height and length were relatively similar (height and length differences of height 0.0 [-0.2 to 0.2], P = 0.804, and 0.2 [-0.1 to 0.4] mm, P = 0.029). Template percent error for height and length was -1.5 (-2.3 to 0.0)% and -1.9 (-3.7 to -0.6)% vs 0.2 (-1.0 to 1.1)% and 1.0 (-0.5 to 1.8)% for the laser. Similar results were found with other materials and sizes. Overall, laser sample dimensions differed by a maximum of 5% (∼1 mm) from the control. CONCLUSIONS The laser projection platform has demonstrated promise as an alternative methodology for the preparation of surgical patches for use in cardiac surgery. This technology has potential to revolutionize preoperative surgical planning for numerous congenital anomalies that require patient-specific patch-augmented repair.
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Affiliation(s)
- Tiffany Saunders
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
| | - Dominic Recco
- Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Nicholas Kneier
- Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Shannen Kizilski
- Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Peter Hammer
- Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - David Hoganson
- Department of Cardiac Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
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Huuskonen A, Hui L, Runeckles K, Hui W, Barron DJ, Friedberg MK, Honjo O. Growth of unrepaired hypoplastic proximal aortic arch and reintervention rate after aortic coarctation repair. J Thorac Cardiovasc Surg 2022; 165:1631-1640.e1. [PMID: 36202666 DOI: 10.1016/j.jtcvs.2022.08.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 08/04/2022] [Accepted: 08/15/2022] [Indexed: 10/14/2022]
Abstract
BACKGROUND Treatment of tubular hypoplasia of the aortic arch (THAA) associated with aortic coarctation (CoA) remains controversial. We aimed to evaluate growth of unrepaired hypoplastic proximal aortic arches (PAAs) after surgical repair for CoA. METHODS Preoperative and follow-up echocardiographic images of 139 patients who underwent CoA repairs from 2005 to 2012 were reviewed. THAA was defined as PAA z-score <-3 and non-THAA group z-score ≥-3. Reintervention rates due to aortic obstruction were assessed using competing risk models and diameters of the aorta were compared with Mann-Whitney U tests. RESULTS Fifty patients (36%) had THAA and 89 (64%) had non-THAA. The survival rate was 94% at 10 years. The overall reintervention rate at 10 years was 9% in the THAA group and 16% in the non-THAA group (P = .54). The catheter reintervention rate at ten years was 2% in the THAA group and 16% in the non-THAA group (P = .031). The surgical reintervention rate at ten years was 7% in the THAA group and 0% in the non-THAA group (P = .016). All 4 patients who required surgical reintervention were in the THAA group and 3 patients with PAA obstruction had preoperative PAA z-scores -3.6, -4.2, and -4.3. Follow-up echocardiograms showed PAA catch-up growth in the THAA group compared with the non-THAA group (preoperative z-score of -3.6 vs -2.3, and at 7 years of -1.1 vs -1.2; P < .001). CONCLUSIONS Unrepaired PAA hypoplasia grows after CoA repair. Reintervention rates were comparable between groups but those with THAA had higher surgical reintervention rates.
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Panzer J, Bové T, Vandekerckhove K, De Wolf D. Hypertension after coarctation repair-a systematic review. Transl Pediatr 2022; 11:270-279. [PMID: 35282025 PMCID: PMC8905104 DOI: 10.21037/tp-21-418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 01/18/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Coarctation of the Aorta (CoA) leads to increased morbidity and mortality later in life despite early surgical or percutaneous treatment. Many long-term complications are related to hypertension (HT) which is a common finding late after coarctation repair. METHODS A systematic Review was performed including articles published between February 2012 to December 2020. Systematic searches were conducted on PubMed and the Cochrane Controlled Trials Register to look for studies on HT after aortic CoA-repair. PRISMA guidelines were used. RESULTS In this systematic review on HT after CoA Repair the mean prevalence of HT was 47.3% (20-70%). A progressive character was of the HT was found, furthermore if only studies are included with 24 h blood pressure (BP) recording in addition to standard BP measurements, the incidence of HT rose to 57.8%. DISCUSSION Most clinical studies look at complications, mortality rate and residual pressure gradient rather than correlating hemodynamic indices with long-term outcome. Although HT is commonly based in measurement of peripheral BP, it has been shown that peripheral BP in CoA patients has a poor correlation with central aortic pressure. Central aortic hemodynamics are significantly altered in patients with repaired CoA, which can now adequately be investigated non-invasively. At the present time there are no studies linking long-term outcome with abnormal central hemodynamics.
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Affiliation(s)
- Joseph Panzer
- Departement Kindercardiologie, Universitair Ziekenhuis Gent (Pediatric Cardiology Department, University Hospital Ghent), Ghent, Belgium
| | - Thierry Bové
- Departement Hartchirurgie, Universitair Ziekenhuis Gent (Cardiac Surgery, University Hospital Ghent), Ghent, Belgium
| | - Kristof Vandekerckhove
- Departement Kindercardiologie, Universitair Ziekenhuis Gent (Pediatric Cardiology Department, University Hospital Ghent), Ghent, Belgium
| | - Daniël De Wolf
- Departement Kindercardiologie, Universitair Ziekenhuis Gent (Pediatric Cardiology Department, University Hospital Ghent), Ghent, Belgium
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Abstract
PURPOSE OF REVIEW Coarctation of the aorta remains a controversial topic with uncertainties in long-term outcomes. RECENT FINDINGS Recent advances in fetal imaging including echocardiography and MRI offer novel opportunities for better detection and prediction of the need for neonatal intervention.New imaging techniques are providing novel insights about the impact of arch geometry and size on flow dynamics and pressure gradients. The importance of arch size rather than shape for optimal hemodynamics has been identified. Long-term outcome data suggest a significant increase in mortality risk in coarctation patients beyond the third decade when compared with the general population. Hypertension is highly prevalent not only in adult patients following repair of coarctation but also in normotensive patients presenting with LV diastolic dysfunction and adverse remodelling, indicating that abnormal vascular properties are important. Patients with coarctation undergoing neonatal repair are at risk for adverse neurodevelopmental outcomes and patients could benefit from timely neurocognitive evaluation and intervention. SUMMARY Optimizing aortic arch size, prevention and aggressive treatment of hypertension and vascular stiffening are important to improve long-term outcomes.
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Desai L, Stefek H, Berhane H, Robinson J, Rigsby C, Markl M. Four-Dimensional flow Magnetic Resonance Imaging for Assessment of Pediatric Coarctation of the Aorta. J Magn Reson Imaging 2022; 55:200-208. [PMID: 34173693 PMCID: PMC9084555 DOI: 10.1002/jmri.27802] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 06/10/2021] [Accepted: 06/11/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Coarctation of the aorta (CoA) typically requires repair, but re-interventions and vascular complications occur, particularly with associated defects like bicuspid aortic valve (BAV). Magnetic resonance imaging (MRI) may identify anatomic and hemodynamic factors contributing to clinical complications. PURPOSE To investigate 4D flow MRI characteristics in pediatric CoA to determine parameters for long-term clinical surveillance. STUDY TYPE Retrospective. POPULATION CoA (n = 21), CoA with BAV (n = 24), BAV alone (n = 29), and healthy control (n = 25). FIELD STRENGTH/SEQUENCE A 1.5 T, 3D CE IR FLASH MRA, 4D flow MRI using 3D time resolved PC-MRI with velocity encoding. ASSESSMENT Thoracic aorta diameters were measured from 3D CE-MRA. Peak systolic velocities and wall shear stress were calculated and flow patterns were visualized throughout the thoracic aorta using 4D flow. Repair characteristics, re-interventions, and need for anti-hypertensive medications were recorded. STATISTICS Descriptive statistics, ANOVA with post hoc t-testing and Bonferroni correction, Kruskal-Wallis H, intraclass correlation coefficient, Fleiss' kappa. RESULTS Patients with CoA with or without repair had smaller transverse arch diameters compared to BAV alone and control cohorts (P < 0.05), higher peak systolic flow velocities and wall shear stress compared to controls in the transverse arch and descending aorta (P < 0.05), and flow derangements in the descending aorta. The most common CoA repairs were extended end-to-end anastomosis (n = 22/45, 48.9%, age at repair 1 ± 2 years, seven re-interventions) and stent/interposition graft placement (n = 10/45, 22.2%, age at repair 12 ± 3 years, one re-intervention). Anti-hypertensive medications were prescribed to 33.3% (n = 15/45) of CoA and 34.4% of BAV alone patients (n = 10/29). DATA CONCLUSIONS Despite repair, CoA alters hemodynamics and flow patterns in the transverse arch and descending aorta. These findings may contribute to vascular remodeling and secondary complications. 4D flow MRI may be valuable in risk stratification, treatment selection and postintervention assessment. Long-term, prospective studies are warranted to correlate patient and MRI factors with clinical outcomes. EVIDENCE LEVEL 3 TECHNICAL EFFICACY: Stage 3.
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Affiliation(s)
- Lajja Desai
- Ann and Robert H. Lurie Children’s Hospital of
Chicago, Chicago, Illinois, USA,Northwestern University Feinberg School of Medicine,
Chicago, Illinois, USA
| | | | - Haben Berhane
- Northwestern University Feinberg School of Medicine,
Chicago, Illinois, USA
| | - Joshua Robinson
- Ann and Robert H. Lurie Children’s Hospital of
Chicago, Chicago, Illinois, USA,Northwestern University Feinberg School of Medicine,
Chicago, Illinois, USA
| | - Cynthia Rigsby
- Ann and Robert H. Lurie Children’s Hospital of
Chicago, Chicago, Illinois, USA
| | - Michael Markl
- Northwestern University Feinberg School of Medicine,
Chicago, Illinois, USA
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9
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Goodarzi Ardakani V, Goordoyal H, Ordonez MV, Sophocleous F, Curtis S, Bedair R, Caputo M, Gambaruto A, Biglino G. Isolating the Effect of Arch Architecture on Aortic Hemodynamics Late After Coarctation Repair: A Computational Study. Front Cardiovasc Med 2022; 9:855118. [PMID: 35811705 PMCID: PMC9263195 DOI: 10.3389/fcvm.2022.855118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 05/30/2022] [Indexed: 11/16/2022] Open
Abstract
Objectives Effective management of aortic coarctation (CoA) affects long-term cardiovascular outcomes. Full appreciation of CoA hemodynamics is important. This study aimed to analyze the relationship between aortic shape and hemodynamic parameters by means of computational simulations, purposely isolating the morphological variable. Methods Computational simulations were run in three aortic models. MRI-derived aortic geometries were generated using a statistical shape modeling methodology. Starting from n = 108 patients, the mean aortic configuration was derived in patients without CoA (n = 37, "no-CoA"), with surgically repaired CoA (n = 58, "r-CoA") and with unrepaired CoA (n = 13, "CoA"). As such, the aortic models represented average configurations for each scenario. Key hemodynamic parameters (i.e., pressure drop, aortic velocity, vorticity, wall shear stress WSS, and length and number of strong flow separations in the descending aorta) were measured in the three models at three time points (peak systole, end systole, end diastole). Results Comparing no-CoA and CoA revealed substantial differences in all hemodynamic parameters. However, simulations revealed significant increases in vorticity at the site of CoA repair, higher WSS in the descending aorta and a 12% increase in power loss, in r-CoA compared to no-CoA, despite no clinically significant narrowing (CoA index >0.8) in the r-CoA model. Conclusions Small alterations in aortic morphology impact on key hemodynamic indices. This may contribute to explaining phenomena such as persistent hypertension in the absence of any clinically significant narrowing. Whilst cardiovascular events in these patients may be related to hypertension, the role of arch geometry may be a contributory factor.
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Affiliation(s)
| | - Harshinee Goordoyal
- Department of Mechanical Engineering, University of Bristol, Bristol, United Kingdom
| | | | - Froso Sophocleous
- University Hospitals Bristol and Weston, NHS Foundation Trust, Bristol, United Kingdom.,Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Stephanie Curtis
- University Hospitals Bristol and Weston, NHS Foundation Trust, Bristol, United Kingdom
| | - Radwa Bedair
- University Hospitals Bristol and Weston, NHS Foundation Trust, Bristol, United Kingdom
| | - Massimo Caputo
- University Hospitals Bristol and Weston, NHS Foundation Trust, Bristol, United Kingdom.,Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Alberto Gambaruto
- Department of Mechanical Engineering, University of Bristol, Bristol, United Kingdom
| | - Giovanni Biglino
- University Hospitals Bristol and Weston, NHS Foundation Trust, Bristol, United Kingdom.,Bristol Medical School, University of Bristol, Bristol, United Kingdom.,National Heart and Lung Institute, Imperial College London, London, United Kingdom
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10
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Ben Ali W, Pesaranghader A, Avram R, Overtchouk P, Perrin N, Laffite S, Cartier R, Ibrahim R, Modine T, Hussin JG. Implementing Machine Learning in Interventional Cardiology: The Benefits Are Worth the Trouble. Front Cardiovasc Med 2021; 8:711401. [PMID: 34957230 PMCID: PMC8692711 DOI: 10.3389/fcvm.2021.711401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 11/08/2021] [Indexed: 12/23/2022] Open
Abstract
Driven by recent innovations and technological progress, the increasing quality and amount of biomedical data coupled with the advances in computing power allowed for much progress in artificial intelligence (AI) approaches for health and biomedical research. In interventional cardiology, the hope is for AI to provide automated analysis and deeper interpretation of data from electrocardiography, computed tomography, magnetic resonance imaging, and electronic health records, among others. Furthermore, high-performance predictive models supporting decision-making hold the potential to improve safety, diagnostic and prognostic prediction in patients undergoing interventional cardiology procedures. These applications include robotic-assisted percutaneous coronary intervention procedures and automatic assessment of coronary stenosis during diagnostic coronary angiograms. Machine learning (ML) has been used in these innovations that have improved the field of interventional cardiology, and more recently, deep Learning (DL) has emerged as one of the most successful branches of ML in many applications. It remains to be seen if DL approaches will have a major impact on current and future practice. DL-based predictive systems also have several limitations, including lack of interpretability and lack of generalizability due to cohort heterogeneity and low sample sizes. There are also challenges for the clinical implementation of these systems, such as ethical limits and data privacy. This review is intended to bring the attention of health practitioners and interventional cardiologists to the broad and helpful applications of ML and DL algorithms to date in the field. Their implementation challenges in daily practice and future applications in the field of interventional cardiology are also discussed.
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Affiliation(s)
- Walid Ben Ali
- Service Médico-Chirurgical, Valvulopathies-Chirurgie Cardiaque-Cardiologie Interventionelle Structurelle, Hôpital Cardiologique de Haut Lévèque, Bordeaux, France.,Structural Heart Program and Interventional Cardiology, Université de Montréal, Montreal Heart Institute, Montréal, QC, Canada
| | - Ahmad Pesaranghader
- Faculty of Medicine, Research Center, Montreal Heart Institute, Université de Montréal, Montréal, QC, Canada.,Computer Science and Operations Research Department, Mila (Quebec Artificial Intelligence Institute), Montreal, QC, Canada
| | - Robert Avram
- Faculty of Medicine, Research Center, Montreal Heart Institute, Université de Montréal, Montréal, QC, Canada
| | - Pavel Overtchouk
- Interventional Cardiology and Cardiovascular Surgery Centre Hospitalier Regional Universitaire de Lille (CHRU de Lille), Lille, France
| | - Nils Perrin
- Structural Heart Program and Interventional Cardiology, Université de Montréal, Montreal Heart Institute, Montréal, QC, Canada
| | - Stéphane Laffite
- Service Médico-Chirurgical, Valvulopathies-Chirurgie Cardiaque-Cardiologie Interventionelle Structurelle, Hôpital Cardiologique de Haut Lévèque, Bordeaux, France
| | - Raymond Cartier
- Structural Heart Program and Interventional Cardiology, Université de Montréal, Montreal Heart Institute, Montréal, QC, Canada
| | - Reda Ibrahim
- Structural Heart Program and Interventional Cardiology, Université de Montréal, Montreal Heart Institute, Montréal, QC, Canada
| | - Thomas Modine
- Service Médico-Chirurgical, Valvulopathies-Chirurgie Cardiaque-Cardiologie Interventionelle Structurelle, Hôpital Cardiologique de Haut Lévèque, Bordeaux, France
| | - Julie G Hussin
- Faculty of Medicine, Research Center, Montreal Heart Institute, Université de Montréal, Montréal, QC, Canada
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11
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Mandell JG, Loke YH, Mass PN, Opfermann J, Cleveland V, Aslan S, Hibino N, Krieger A, Olivieri LJ. Aorta size mismatch predicts decreased exercise capacity in patients with successfully repaired coarctation of the aorta. J Thorac Cardiovasc Surg 2021; 162:183-192.e2. [PMID: 33131888 DOI: 10.1016/j.jtcvs.2020.09.103] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 09/09/2020] [Accepted: 09/18/2020] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Coarctation of the aorta (CoA) is associated with decreased exercise capacity despite successful repair with no residual stenosis; however, the hemodynamic mechanism remains unknown. This study aims to correlate aortic arch geometry with exercise capacity in patients with successfully repaired CoA and explain hemodynamic changes using 3-dimensional-printed aorta models in a mock circulatory flow loop. METHODS A retrospective chart review identified patients with CoA repair who had cardiac magnetic resonance imaging and an exercise stress test. Measurements included aorta diameters, arch height to diameter ratio, left ventricular function, and percent descending aorta (%DAo) flow. Each aorta was printed 3-dimensionally for the flow loop. Flow and pressure were measured at the ascending aorta (AAo) and DAo during simulated rest and exercise. Measurements were correlated with percent predicted peak oxygen consumption (VO2 max). RESULTS Fifteen patients (mean age 26.8 ± 8.6 years) had a VO2 max between 47% and 126% predicted (mean 92 ± 20%) with normal left ventricular function. DAo diameter and %DAo flow positively correlated with VO2 (P = .007 and P = .04, respectively). AAo to DAo diameter ratio (DAAo/DDAo) negatively correlated with VO2 (P < .001). From flow loop simulations, the ratio of %DAo flow in exercise to rest negatively correlated with VO2 (P = .02) and positively correlated with DAAo/DDAo (P < .01). CONCLUSIONS This study suggests aorta size mismatch (DAAo/DDAo) is a novel, clinically important measurement predicting exercise capacity in patients with successful CoA repair, likely due to increased resistance and altered flow distribution. Aorta size mismatch and %DAo flow are targets for further clinical evaluation in repaired CoA.
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Affiliation(s)
- Jason G Mandell
- Division of Cardiology, Children's National Hospital, Washington, DC.
| | - Yue-Hin Loke
- Division of Cardiology, Children's National Hospital, Washington, DC
| | - Paige N Mass
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, DC
| | - Justin Opfermann
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, DC
| | - Vincent Cleveland
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, DC
| | - Seda Aslan
- Department of Mechanical Engineering, University of Maryland, College Park, Md
| | - Narutoshi Hibino
- Section of Cardiac Surgery, Department of Surgery, University of Chicago/Advocate Children's Hospital Chicago, Ill
| | - Axel Krieger
- Department of Mechanical Engineering, University of Maryland, College Park, Md
| | - Laura J Olivieri
- Division of Cardiology, Children's National Hospital, Washington, DC; Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, DC
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12
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Bhuva AN, D'Silva A, Torlasco C, Nadarajan N, Jones S, Boubertakh R, Van Zalen J, Scully P, Knott K, Benedetti G, Augusto JB, Bastiaenen R, Lloyd G, Sharma S, Moon JC, Parker KH, Manisty CH, Hughes AD. Non-invasive assessment of ventriculo-arterial coupling using aortic wave intensity analysis combining central blood pressure and phase-contrast cardiovascular magnetic resonance. Eur Heart J Cardiovasc Imaging 2021; 21:805-813. [PMID: 31501858 DOI: 10.1093/ehjci/jez227] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/01/2019] [Accepted: 08/20/2019] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Wave intensity analysis (WIA) in the aorta offers important clinical and mechanistic insight into ventriculo-arterial coupling, but is difficult to measure non-invasively. We performed WIA by combining standard cardiovascular magnetic resonance (CMR) flow-velocity and non-invasive central blood pressure (cBP) waveforms. METHODS AND RESULTS Two hundred and six healthy volunteers (age range 21-73 years, 47% male) underwent sequential phase contrast CMR (Siemens Aera 1.5 T, 1.97 × 1.77 mm2, 9.2 ms temporal resolution) and supra-systolic oscillometric cBP measurement (200 Hz). Velocity (U) and central pressure (P) waveforms were aligned using the waveform foot, and local wave speed was calculated both from the PU-loop (c) and the sum of squares method (cSS). These were compared with CMR transit time derived aortic arch pulse wave velocity (PWVtt). Associations were examined using multivariable regression. The peak intensity of the initial compression wave, backward compression wave, and forward decompression wave were 69.5 ± 28, -6.6 ± 4.2, and 6.2 ± 2.5 × 104 W/m2/cycle2, respectively; reflection index was 0.10 ± 0.06. PWVtt correlated with c or cSS (r = 0.60 and 0.68, respectively, P < 0.01 for both). Increasing age decade and female sex were independently associated with decreased forward compression wave (-8.6 and -20.7 W/m2/cycle2, respectively, P < 0.01) and greater wave reflection index (0.02 and 0.03, respectively, P < 0.001). CONCLUSION This novel non-invasive technique permits straightforward measurement of wave intensity at scale. Local wave speed showed good agreement with PWVtt, and correlation was stronger using the cSS than the PU-loop. Ageing and female sex were associated with poorer ventriculo-arterial coupling in healthy individuals.
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Affiliation(s)
- Anish N Bhuva
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - A D'Silva
- Cardiovascular Sciences Research Centre, St. George's University of London, Blackshaw Road, Tooting, London SW17 0QT, UK
| | - C Torlasco
- IRCCS, Istituto Auxologico Italiano, Via Ludovico Ariosto 13, 20145 Milan, Italy, Italy
| | - N Nadarajan
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK
| | - S Jones
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK
| | - R Boubertakh
- Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - J Van Zalen
- Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - P Scully
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - K Knott
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - G Benedetti
- Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - J B Augusto
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - Rachel Bastiaenen
- Cardiovascular Sciences Research Centre, St. George's University of London, Blackshaw Road, Tooting, London SW17 0QT, UK
| | - G Lloyd
- Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - S Sharma
- Cardiovascular Sciences Research Centre, St. George's University of London, Blackshaw Road, Tooting, London SW17 0QT, UK
| | - J C Moon
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - K H Parker
- Department of Bioengineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - C H Manisty
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,Barts Heart Centre, West Smithfield, London EC1A 7BE, UK
| | - Alun D Hughes
- Institute of Cardiovascular Science, University College London, 69 Chenies Mews, London WC1E6HX, UK.,MRC Unit for Lifelong Health and Ageing at UCL, 1-19 Torrington Place, London WC1E 7HB, UK
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13
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Yurpolskaya LA, Shlyappo MA, Makarenko VN, Svobodov AA, Levchenko EG, Makarenko MV, Poromov AA. [4D FLOW Magnetic Resonance Imaging in the Study of Blood Flow in Patients With Aortic Coarctation in the Long-Term After Surgery]. ACTA ACUST UNITED AC 2020; 60:54-64. [PMID: 33155959 DOI: 10.18087/cardio.2020.8.n1094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/29/2020] [Indexed: 11/18/2022]
Abstract
Aim Comprehensive evaluation of blood flow in the thoracic aorta using a software for 4D processing of magnetic resonance (MR) images of the heart and blood vessels (4D Flow) in patients with aortic coarctation in the late postoperative period.Materials and methods The MR study of the heart was performed for 10 patients (7 boys and 3 girls) aged 8 to 13 years (median, 9.5 [8.3; 10.8] years) who underwent resection with end-to-end anastomosis for aortic coarctation at age of 2 weeks to 10 months. MR tomography was performed on a 1.5 T MR scanner using a multichannel surface coil for scanning, electrocardiographic synchronization, and a specialized package of pulse sequences for scanning of the heart. Blood flow was evaluated with a 4D data handling software for processing of MR images of heart and blood vessels (4D Flow). The following blood flow parameters were analyzed: blood flow volume per second, peak blood flow velocity, peak and minimum blood flow area at the levels of ascending aorta, arch, isthmus, and descending aorta, and pressure gradient at the level of maximum narrowing of the aorta. 3D-MR images were used for evaluation of aortic geometry. Blood flow formation, distribution, and trajectories were analyzed by maps of vectors, particle trace, and stream lines. Statistical analysis was performed with a Statistica (v. 6.0 StatSoft Inc.) package.Results Accelerated flow in the region of residual aortic stenosis in systole was observed in all patients; 4 patients had an additional vortex flow below the aortic stenosis and a spiral flow in the descending aorta. The pressure gradient on the aortic isthmus was directly correlated with the left ventricular myocardial mass index (r=0.65; р=0.04) and indexes of blood flow in the ascending and descending aorta (р=0.03; р=0.026). No significant correlation was found for blood flow indexes and geometry of the aortic arch (H / L). Delayed contrast enhancement MR imaging did not detect any fibrotic changes in the myocardium in only one patient. The fibrosis severity inversely correlated with the right ventricular ejection fraction (r=0.65; р=0.04) and directly correlated with the pressure gradient at the aortic isthmus (r=0.63; p=0.05).Conclusion The 4D MR image processing software for the heart and blood vessels allows studying the blood flow in detail under natural conditions, provides potential advantages in comprehensive evaluation of patients with aortic coarctation during a dynamic follow-up. For a definitive conclusion about the relationship between the altered blood flow in the thoracic aorta and markers of residual, post-correction pathology, larger studies are required as well as long-term follow-up of patients with documented pathological patterns of blood flow (changes in blood flow velocity and volume throughout the entire thoracic aorta in combination with disorders in the normal flow geometry during the cardiac cycle).
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Affiliation(s)
- L A Yurpolskaya
- A.N. Bakoulev Scientific Center for Cardiovascular Surgery, Moscow
| | - M A Shlyappo
- A.N. Bakoulev Scientific Center for Cardiovascular Surgery, Moscow
| | - V N Makarenko
- A.N. Bakoulev Scientific Center for Cardiovascular Surgery, Moscow
| | - A A Svobodov
- A.N. Bakoulev Scientific Center for Cardiovascular Surgery, Moscow
| | - E G Levchenko
- A.N. Bakoulev Scientific Center for Cardiovascular Surgery, Moscow
| | - M V Makarenko
- A.N. Bakoulev Scientific Center for Cardiovascular Surgery, Moscow
| | - A A Poromov
- I. Mechnikov Research Institute of Vaccines and Sera, Moscow, Russia
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14
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Ma S, Zheng J, Xu Y, Yang Z, Zhu Y, Su X, Mo X. Identified plasma proteins related to vascular structure are associated with coarctation of the aorta in children. Ital J Pediatr 2020; 46:63. [PMID: 32430056 PMCID: PMC7236479 DOI: 10.1186/s13052-020-00830-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 05/11/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Coarctation of the aorta (CoA), presenting with local stenosis of the aorta is involved in many cardiovascular processes. However, there has been little research on the mechanism of coarctation of the aorta. METHODS Altered proteins were identified by isobaric tag for relative and absolute quantitation (iTRAQ) technology in 8 participants, and further analysed by heatmap, Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes pathway (KEGG) and Search Tool for the Retrieval of Interacting Gene (STRING). Of these, two vascular structure-related proteins were further validated by using enzyme-linked immunosorbent assay (ELISA) in a new cohort of CoA patients. RESULTS 39 differentially expressed plasma proteins were first identified in patients with coarctation of the aorta by iTRAQ. Of these, fibulin-1 (FBLN1) and insulin-like growth factor-binding protein complex acid labile subunit (ALS) were considered candidates and further validation also showed that the level of FBLN1 in the CoA group (8.92 ± 2.36 μg/ml) was significantly higher compared with control group (6.13 ± 1.94 μg/ml), and the level of ALS in CoA children (348.08 ± 216.74 ng/ml) was significantly lower than the level in normal children (619.46 ± 274.08 ng/ml). CONCLUSIONS The differentially expressed proteins identified in the plasma from CoA patients indicated that they may play critical roles in CoA and that they could potentially be utilized as biomarkers for diagnosis. Altered vascular related proteins were associated with COA. These results provide a foundation for further understanding and studying the aetiology and pathogenesis of coarctation of the aorta.
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Affiliation(s)
- Siyu Ma
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China
| | - Junqiang Zheng
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China
| | - Yang Xu
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China
| | - Zhaocong Yang
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China
| | - Yu Zhu
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China
| | - Xiaoqi Su
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China
| | - Xuming Mo
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, China.
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15
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Quail MA, Muthurangu V. Letter by Quail and Muthurangu Regarding Article, "Doppler-Derived Arterial Load Indices Better Reflect Left Ventricular Afterload Than Systolic Blood Pressure in Coarctation of Aorta". Circ Cardiovasc Imaging 2020; 13:e010643. [PMID: 32295397 DOI: 10.1161/circimaging.120.010643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Michael A Quail
- Paediatric Cardiology Department, Great Ormond Street Hospital for Children, Great Ormond Street, London, United Kingdom (M.A.Q.).,Centre for Cardiovascular Imaging, Institute of Cardiovascular Science, University College London, United Kingdom (M.A.Q., V.M.)
| | - Vivek Muthurangu
- Centre for Cardiovascular Imaging, Institute of Cardiovascular Science, University College London, United Kingdom (M.A.Q., V.M.)
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16
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Quail MA, Segers P, Steeden JA, Muthurangu V. Correction to: The aorta after coarctation repair - effects of calibre and curvature on arterial haemodynamics. J Cardiovasc Magn Reson 2019; 21:31. [PMID: 31122264 PMCID: PMC6533728 DOI: 10.1186/s12968-019-0540-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
In the original version of this article [1], published on 11 April 2019, there is 1 error in the 'Conclusion' paragraph of the abstract.
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Affiliation(s)
- Michael A Quail
- Centre for Translational Cardiovascular Imaging, Institute of Cardiovascular Science, University College London and Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Patrick Segers
- IBiTech-bioMMeda, iMinds Medical IT, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium
| | - Jennifer A Steeden
- Centre for Translational Cardiovascular Imaging, Institute of Cardiovascular Science, University College London and Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Vivek Muthurangu
- Centre for Translational Cardiovascular Imaging, Institute of Cardiovascular Science, University College London and Great Ormond Street Hospital for Children, London, WC1N 3JH, UK.
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