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Qin T, Mao W, Caballero A, Kamioka N, Lerakis S, Lain S, Elefteriades J, Liang L, Sun W. Patient-specific analysis of bicuspid aortic valve hemodynamics using a fully coupled fluid-structure interaction model. Comput Biol Med 2024; 172:108191. [PMID: 38457932 DOI: 10.1016/j.compbiomed.2024.108191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/10/2024] [Accepted: 02/18/2024] [Indexed: 03/10/2024]
Abstract
Bicuspid aortic valve (BAV), the most common congenital heart disease, is prone to develop significant valvular dysfunction and aortic wall abnormalities such as ascending aortic aneurysm. Growing evidence has suggested that abnormal BAV hemodynamics could contribute to disease progression. In order to investigate BAV hemodynamics, we performed 3D patient-specific fluid-structure interaction (FSI) simulations with fully coupled blood flow dynamics and valve motion throughout the cardiac cycle. Results showed that the hemodynamics during systole can be characterized by a systolic jet and two counter-rotating recirculation vortices. At peak systole, the jet was usually eccentric, with asymmetric recirculation vortices and helical flow motion in the ascending aorta. The flow structure at peak systole was quantified using the vorticity, flow rate reversal ratio and local normalized helicity (LNH) at four locations from the aortic root to the ascending aorta. The systolic jet was evaluated with the peak velocity, normalized flow displacement, and jet angle. It was found that peak velocity and normalized flow displacement (rather than jet angle) gave a strong correlation with the vorticity and LNH in the ascending aorta, which suggests that these two metrics could be used for clinical noninvasive evaluation of abnormal blood flow patterns in BAV patients.
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Affiliation(s)
- Tongran Qin
- Tissue Mechanics Laboratory, The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA; Sutra Medical Inc, Lake Forest, CA, USA
| | - Wenbin Mao
- Mechanical Engineering, University of South Florida, FL, USA
| | - Andrés Caballero
- Tissue Mechanics Laboratory, The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA; PAI+ Research Group, Mechanical Engineering Department, Universidad Autónoma de Occidente, Cali, Colombia
| | | | - Stamatios Lerakis
- Emory University, School of Medicine, Atlanta, GA, USA; Division of Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Santiago Lain
- PAI+ Research Group, Mechanical Engineering Department, Universidad Autónoma de Occidente, Cali, Colombia
| | - John Elefteriades
- Aortic Institute, School of Medicine, Yale University, New Haven, CT, USA
| | - Liang Liang
- Department of Computer Science, University of Miami, Coral Gables, FL, USA
| | - Wei Sun
- Tissue Mechanics Laboratory, The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA; Sutra Medical Inc, Lake Forest, CA, USA.
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Ooida J, Kiyohara N, Noguchi H, Oguchi Y, Nagane K, Sakaguchi T, Aoyama G, Shige F, Chapman JV, Asami M, Kofoed KF, Pham MHC, Suzuki K. An In Silico Model for Predicting the Efficacy of Edge-to-Edge Repair for Mitral Regurgitation. J Biomech Eng 2024; 146:021004. [PMID: 37978048 DOI: 10.1115/1.4064055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
In recent years, transcatheter edge-to-edge repair (TEER) has been widely adopted as an effective treatment for mitral regurgitation (MR). The aim of this study is to develop a personalized in silico model to predict the effect of edge-to-edge repair in advance to the procedure for each individual patient. For this purpose, we propose a combination of a valve deformation model for computing the mitral valve (MV) orifice area (MVOA) and a lumped parameter model for the hemodynamics, specifically mitral regurgitation volume (RVol). Although we cannot obtain detailed information on the three-dimensional flow field near the mitral valve, we can rapidly simulate the important medical parameters for the clinical decision support. In the present method, we construct the patient-specific pre-operative models by using the parameter optimization and then simulate the postoperative state by applying the additional clipping condition. The computed preclip MVOAs show good agreement with the clinical measurements, and the correlation coefficient takes 0.998. In addition, the MR grade in terms of RVol also has good correlation with the grade by ground truth MVOA. Finally, we try to investigate the applicability for the predicting the postclip state. The simulated valve shapes clearly show the well-known double orifice and the improvement of the MVOA, compared with the preclip state. Similarly, we confirmed the improved reverse flow and MR grade in terms of RVol. A total computational time is approximately 8 h by using general-purpose PC. These results obviously indicate that the present in silico model has good capability for the assessment of edge-to-edge repair.
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Affiliation(s)
- Junichi Ooida
- Canon Inc., 3-30-2 Shimomaruko, Ota-ku, Tokyo 146-8501, Japan
| | - Naoki Kiyohara
- Canon Inc., 3-30-2 Shimomaruko, Ota-ku, Tokyo 146-8501, Japan
| | | | - Yuichiro Oguchi
- Canon Inc., 3-30-2 Shimomaruko, Ota-ku, Tokyo 146-8501, Japan
| | - Kohei Nagane
- Canon Inc., 3-30-2 Shimomaruko, Ota-ku, Tokyo 146-8501, Japan
| | - Takuya Sakaguchi
- Canon Medical Systems Corporation, 1385 Shimoishigami, Ohtawara, Tochigi 324-8550, Japan
| | - Gakuto Aoyama
- Canon Medical Systems Corporation, 1385 Shimoishigami, Ohtawara, Tochigi 324-8550, Japan
| | - Fumimasa Shige
- Canon Medical Systems Corporation, 1385 Shimoishigami, Ohtawara, Tochigi 324-8550, Japan
| | - James V Chapman
- Canon Medical Informatics, Inc., 5850 Opus Parkway, Suite 300, Minnetonka, MN 55343
| | - Masahiko Asami
- Division of Cardiology, Mitsui Memorial Hospital, 1 Kandaizumi-cho, Chiyoda-ku, Tokyo 101-8643, Japan
| | - Klaus Fuglsang Kofoed
- Department of Cardiology and Radiology, Rigshospitalet & University of Copenhagen, Blegdamsvej 9, København 2100, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, Rigshospitalet & University of Copenhagen, Blegdamsvej 9, København 2100, Denmark
| | - Michael Huy Cuong Pham
- Department of Cardiology and Radiology, Rigshospitalet & University of Copenhagen, Blegdamsvej 9, København 2100, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, Rigshospitalet & University of Copenhagen, Blegdamsvej 9, København 2100, Denmark
| | - Koshiro Suzuki
- Canon Inc., 3-30-2 Shimomaruko, Ota-ku, Tokyo 146-8501, Japan
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Shechter A, Kaewkes D, Lee M, Makar M, Patel V, Koren O, Koseki K, Nagasaka T, Skaf S, Chakravarty T, Makkar RR, Siegel RJ. Correlates and prognostic implications of LVEF reduction after transcatheter edge-to-edge repair for primary mitral regurgitation. Eur Heart J Cardiovasc Imaging 2023; 25:136-147. [PMID: 37590951 DOI: 10.1093/ehjci/jead210] [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: 03/01/2023] [Revised: 07/20/2023] [Accepted: 08/15/2023] [Indexed: 08/19/2023] Open
Abstract
AIMS To explore the characteristics and outcomes of patients undergoing transcatheter edge-to-edge repair (TEER) for primary mitral regurgitation (MR) according to the presence of left ventricular ejection fraction (LVEF) reduction post-procedure. METHODS AND RESULTS We retrospectively analysed 317 individuals [median age 83 (interquartile range, 75-88) years, 197 (62.1%) males] treated with an isolated, first-time TEER that was concluded by a successful clip deployment. Stratified by LVEF change at 1-month compared with baseline, the cohort was evaluated for residual MR and heart failure (HF) indices up to 1-year, as well as all-cause mortality and HF hospitalizations at 2-years. Overall, 212 (66.9%) patients displayed LVEF reduction, which was mainly driven by lowered total stroke volume and diffuse hypocontractility. While post-procedural MR, transmitral mean pressure gradient, and functional status were comparable in the two study groups, patients with LVEF reduction exhibited a greater decline in filling pressures intra-procedurally; left ventricular mass index, pulmonary arterial systolic pressure, and serum natriuretic peptide level at 1-month; and walking limitation at 1-year. Also, by 2 years, they were less likely to die (13.3% vs. 5.7%, P = 0.019), be readmitted for HF (17.1% vs. 9.0%, P = 0.033), and experience either of the two (23.8% vs. 12.7%, P = 0.012). Lastly, LVEF reduction was the only 1-month echocardiographic parameter to independently confer an attenuated risk for the composite of deaths or HF hospitalizations (HR 0.28, 95% CI 0.10-0.78, P = 0.016). CONCLUSION LVEF reduction at 1-month post-TEER for primary MR is associated with better clinical outcomes, possibly reflecting a more pronounced unloading effect of the procedure.
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Affiliation(s)
- Alon Shechter
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- Department of Cardiology, Rabin Medical Center, Petach Tikva, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Danon Kaewkes
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- Department of Medicine, Faculty of Medicine, Khon Kaen University, Nai Muang, Thailand
| | - Mirae Lee
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- Division of Cardiology, Department of Medicine, Samsung Changwon Hospital, Changwon, Republic of Korea
| | - Moody Makar
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
| | - Vivek Patel
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
| | - Ofir Koren
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel
| | - Keita Koseki
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Takashi Nagasaka
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Sabah Skaf
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
| | - Tarun Chakravarty
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
| | - Raj R Makkar
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
| | - Robert J Siegel
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3100, Los Angeles, CA 90048, USA
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
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Marchetti D, Di Lenarda F, Novembre ML, Paolisso P, Schillaci M, Melotti E, Doldi M, Terzi R, Gallazzi M, Conte E, Volpato V, Bartorelli A, Andreini D. Contemporary Echocardiographic Evaluation of Mitral Regurgitation and Guidance for Percutaneous Mitral Valve Repair. J Clin Med 2023; 12:7121. [PMID: 38002733 PMCID: PMC10672624 DOI: 10.3390/jcm12227121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/16/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
Mitral valve regurgitation (MR) is a multifaceted valvular heart disease. Echocardiography plays a central role in etiology assessment, severity quantification, treatment candidacy, outcome evaluation, and patient follow-up. In this review, we describe the comprehensive echocardiographic assessment of MR, including transthoracic (TTE) and transesophageal (TEE) approaches, 2D and 3D modalities, strain imaging, stress echocardiography, and artificial intelligence (AI) applications. Transcatheter edge-to-edge mitral valve repair (TEER) has been established as a key therapy for patients with severe, symptomatic MR and high surgical risk. TEER is performed under TEE guidance. We outline a practical overview of echocardiographic guidance on TEER.
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Affiliation(s)
- Davide Marchetti
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Francesca Di Lenarda
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Maria Laura Novembre
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Pasquale Paolisso
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Matteo Schillaci
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Eleonora Melotti
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Marco Doldi
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Riccardo Terzi
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Michele Gallazzi
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Edoardo Conte
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Valentina Volpato
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Antonio Bartorelli
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
| | - Daniele Andreini
- Division of University Cardiology, IRCCS Ospedale Galeazzi Sant’Ambrogio, 20100 Milan, Italy; (D.M.); (E.M.); (R.T.); (A.B.)
- Department of Clinical and Biomedical Sciences, University of Milan, 20100 Milan, Italy
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Shechter A, Lee M, Kaewkes D, Koren O, Skaf S, Chakravarty T, Koseki K, Patel V, Makkar RR, Siegel RJ. Repeat Mitral Transcatheter Edge-to-Edge Repair for Recurrent Significant Mitral Regurgitation. J Am Heart Assoc 2023; 12:e028654. [PMID: 37119061 PMCID: PMC10227228 DOI: 10.1161/jaha.122.028654] [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: 10/28/2022] [Accepted: 03/30/2023] [Indexed: 04/30/2023]
Abstract
Background There are limited data on repeat mitral transcatheter edge-to-edge repair for recurrent significant mitral regurgitation (MR). Methods and Results We conducted a single-center, retrospective analysis of consecutive patients referred to a second mitral transcatheter edge-to-edge repair after a technically successful first procedure. Clinical, laboratory, and echocardiographic measures were assessed up to 1 year after the intervention. The composite of all-cause death or heart failure (HF) hospitalizations constituted the primary outcome. A total of 52 patients (median age, 81 [interquartile range, 76-87] years, 29 [55.8%] men, 26 [50.0%] with functional MR) met the inclusion criteria. MR recurrences were mostly related to progression of the underlying cardiac pathology. All procedures were technically successful. At 1 year, most patients with available records (n=24; 96.0%) experienced improvement in MR severity or New York Heart Association functional class that was statistically significant but numerically modest. Fourteen (26.9%) patients died or were hospitalized due to HF. These were higher-risk cases with predominantly functional MR who mostly underwent an urgent procedure and exhibited more severe HF indices before the intervention, as well as an attenuated 1-month clinical and echocardiographic response. Overall, 1-year course was comparable to that experienced by patients who underwent only a first transcatheter edge-to-edge repair at our institution (n=902). Tricuspid regurgitation of greater than moderate grade was the only baseline parameter to independently predict the primary outcome. Conclusions Repeat mitral transcatheter edge-to-edge repair is feasible, safe, and clinically effective, especially in non-functional MR patients without concomitant significant tricuspid regurgitation.
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Affiliation(s)
- Alon Shechter
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
- Department of CardiologyRabin Medical CenterPetach TikvaIsrael
- Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Mirae Lee
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
- Division of Cardiology, Department of MedicineSamsung Changwon HospitalChangwonRepublic of Korea
| | - Danon Kaewkes
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
- Department of Medicine, Faculty of MedicineKhon Kaen UniversityThailand
| | - Ofir Koren
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
- Rappaport Faculty of MedicineTechnion Israel Institute of TechnologyHaifaIsrael
| | - Sabah Skaf
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
| | - Tarun Chakravarty
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
| | - Keita Koseki
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
- Department of Cardiovascular MedicineThe University of TokyoTokyoJapan
| | - Vivek Patel
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
| | - Raj R. Makkar
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
| | - Robert J. Siegel
- Department of CardiologySmidt Heart Institute, Cedars‐Sinai Medical CenterLos AngelesCAUSA
- David Geffen School of MedicineUniversity of California Los AngelesLos AngelesCAUSA
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Altes A, Vermes E, Levy F, Vancraeynest D, Pasquet A, Vincentelli A, Gerber BL, Tribouilloy C, Maréchaux S. Quantification of primary mitral regurgitation by echocardiography: A practical appraisal. Front Cardiovasc Med 2023; 10:1107724. [PMID: 36970355 PMCID: PMC10036770 DOI: 10.3389/fcvm.2023.1107724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 02/20/2023] [Indexed: 03/12/2023] Open
Abstract
The accurate quantification of primary mitral regurgitation (MR) and its consequences on cardiac remodeling is of paramount importance to determine the best timing for surgery in these patients. The recommended echocardiographic grading of primary MR severity relies on an integrated multiparametric approach. It is expected that the large number of echocardiographic parameters collected would offer the possibility to check the measured values regarding their congruence in order to conclude reliably on MR severity. However, the use of multiple parameters to grade MR can result in potential discrepancies between one or more of them. Importantly, many factors beyond MR severity impact the values obtained for these parameters including technical settings, anatomic and hemodynamic considerations, patient's characteristics and echocardiographer' skills. Hence, clinicians involved in valvular diseases should be well aware of the respective strengths and pitfalls of each of MR grading methods by echocardiography. Recent literature highlighted the need for a reappraisal of the severity of primary MR from a hemodynamic perspective. The estimation of MR regurgitation fraction by indirect quantitative methods, whenever possible, should be central when grading the severity of these patients. The assessment of the MR effective regurgitant orifice area by the proximal flow convergence method should be used in a semi-quantitative manner. Furthermore, it is crucial to acknowledge specific clinical situations in MR at risk of misevaluation when grading severity such as late-systolic MR, bi-leaflet prolapse with multiple jets or extensive leak, wall-constrained eccentric jet or in older patients with complex MR mechanism. Finally, it is debatable whether the 4-grades classification of MR severity would be still relevant nowadays, since the indication for mitral valve (MV) surgery is discussed in clinical practice for patients with 3+ and 4+ primary MR based on symptoms, specific markers of adverse outcome and MV repair probability. Primary MR grading should be seen as a continuum integrating both quantification of MR and its consequences, even for patients with presumed “moderate” MR.
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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
- Division of Cardiology, Department of Cardiovascular Diseases, Cliniques Universitaires St. Luc, Pôle de Recherche Cardiovasculaire (CARD), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | | | - Franck Levy
- Department of Cardiology, Center Cardio-Thoracique de Monaco, Monaco, Monaco
| | - David Vancraeynest
- Division of Cardiology, Department of Cardiovascular Diseases, Cliniques Universitaires St. Luc, Pôle de Recherche Cardiovasculaire (CARD), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - Agnès Pasquet
- Division of Cardiology, Department of Cardiovascular Diseases, Cliniques Universitaires St. Luc, Pôle de Recherche Cardiovasculaire (CARD), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - André Vincentelli
- Cardiac Surgery Department, Centre Hospitalier Régional et Universitaire de Lille, Lille, France
| | - Bernhard L. Gerber
- Division of Cardiology, Department of Cardiovascular Diseases, Cliniques Universitaires St. Luc, Pôle de Recherche Cardiovasculaire (CARD), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | | | - 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
- Correspondence: Sylvestre Maréchaux
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