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Brissett S, Aurigemma GP, Parker MW. The Promise and Pitfalls of Three-Dimensional Vena Contracta for Mitral Regurgitation. J Am Soc Echocardiogr 2024; 37:599-602. [PMID: 38522487 DOI: 10.1016/j.echo.2024.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 03/03/2024] [Indexed: 03/26/2024]
Affiliation(s)
- Shantel Brissett
- UMass Memorial Medical School and UMass Memorial Medical Center, Worcester, Massachusetts
| | - Gerard P Aurigemma
- UMass Memorial Medical School and UMass Memorial Medical Center, Worcester, Massachusetts
| | - Matthew W Parker
- UMass Memorial Medical School and UMass Memorial Medical Center, Worcester, Massachusetts.
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2
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Pasledni R, Kozarski M, Mizerski JK, Darowski M, Okrzeja P, Zieliński K. The hybrid (physical-computational) cardiovascular simulator to study valvular diseases. J Biomech 2024; 170:112173. [PMID: 38805856 DOI: 10.1016/j.jbiomech.2024.112173] [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: 12/15/2023] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 05/30/2024]
Abstract
To better understand the impact of valvular heart disease (VHD) on the hemodynamics of the circulatory system, investigations can be carried out using a model of the cardiovascular system. In this study, a previously developed hybrid (hydro-numerical) simulator of the cardiovascular system (HCS) was adapted and used. In our HCS Björk-Shiley mechanical heart valves were used, playing the role of mitral and aortic ones. In order to simulate aortic stenosis (AS) and mitral regurgitation (MR), special mechanical devices have been developed and integrated with the HCS. The simulation results proved that the system works correctly. Namely, in the case of AS - the mean pulmonary arterial pressure was increased due to increased preload of the left ventricle and the decrease in right ventricular preload was caused by a decrease in systemic arterial pressure. The severity of AS was performed based on the transaortic pressure gradient as well as using the Gorlin and Aaslid equations. In the case of severe AS, when the mean gradient was above 40 mmHg, the aortic valve orifice area was 0.5 cm2, which is in line with ACC/AHA guidelines. For the case of MR - with increasing severity of MR, there was a decrease in the left ventricular pressure and an increase in left atrial pressure. Using mechanical heart valves to simulate VHD by the HCS can be a valuable tool for biomedical research, providing a safe and controlled environment to study and understand the pathophysiology of VHD.
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Affiliation(s)
- Raman Pasledni
- Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland.
| | - Maciej Kozarski
- Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland
| | - Jeremi Kaj Mizerski
- Department of Cardiac Surgery, The Pope John Paul II Province Hospital, Aleje Jana Pawla II 10, 22-400 Zamosc, Poland
| | - Marek Darowski
- Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland
| | - Piotr Okrzeja
- Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland
| | - Krzysztof Zieliński
- Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Ks. Trojdena 4, 02-109 Warsaw, Poland
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Stanley A, Athanasuleas C. Timing of Surgery for Asymptomatic Primary Mitral Regurgitation: Possible Value of Early, Serial Measurements of Left Ventricular Sphericity. Curr Cardiol Rev 2024; 20:93-101. [PMID: 38351687 PMCID: PMC11107465 DOI: 10.2174/011573403x277223240206062319] [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: 11/10/2023] [Revised: 01/11/2024] [Accepted: 01/24/2024] [Indexed: 04/30/2024] Open
Abstract
Asymptomatic primary mitral regurgitation due to myxomatous degeneration of the mitral valve leaflets may remain so for long periods, even as left ventricular function progresses to a decompensated stage. During the early compensated stage, the ventricle's initial response to the volume overload is an asymmetric increase in the diastolic short axis dimension, accomplished by a diastolic shift of the interventricular septum into the right ventricular cavity, creating a more spherical left ventricular diastolic shape, increasing diastolic filling and stroke volume. Early valve repair is recommended to reduce postoperative left ventricular dysfunction. Early serial measurements of left ventricular sphericity index [LV-Si]. during the compensated stage of mitral regurgitation might identify subtle changes in left ventricular shape and assist in determining the optimal earliest timing for surgical intervention.
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Affiliation(s)
- Alfred Stanley
- Cardiovascular Associates of the Southeast, Birmingham AL and Kemp-Carraway Heart Institute, Birmingham, AL, USA
| | - Constantine Athanasuleas
- Department of Surgery, North Alabama Medical Center and Kemp-Carraway Heart Institute, Birmingham, AL, USA
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Ambrožič J, Cvijić M. Patterns of progression of secondary mitral regurgitation: new findings and old challenges. Eur Heart J Cardiovasc Imaging 2023; 24:e48. [PMID: 36478191 DOI: 10.1093/ehjci/jeac248] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 11/21/2022] [Indexed: 12/13/2022] Open
Affiliation(s)
- Jana Ambrožič
- Department of Cardiology, University Medical Centre Ljubljana, Zaloska 7, 1000 Ljubljana, Slovenia
| | - Marta Cvijić
- Department of Cardiology, University Medical Centre Ljubljana, Zaloska 7, 1000 Ljubljana, Slovenia.,Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
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Substitute parameters of exercise-induced pulmonary hypertension and usefulness of low workload exercise stress echocardiography in mitral regurgitation. Sci Rep 2022; 12:15977. [PMID: 36155621 PMCID: PMC9510128 DOI: 10.1038/s41598-022-19987-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 09/07/2022] [Indexed: 11/18/2022] Open
Abstract
In asymptomatic patients with mitral regurgitation (MR), data of exercise-induced pulmonary hypertension (EIPH) are limited, and feasibility of evaluating EIPH is not high. We aimed to investigate prognostic impact of EIPH and its substitute parameters. Exercise stress echocardiography (ESE) were performed in 123 consecutive patients with moderate to severe degenerative MR. The endpoint was a composite of death, hospitalization for heart failure, and worsening of symptoms. EIPH [tricuspid regurgitation peak gradient (TRPG) at peak workload ≥ 50 mmHg] was shown in 57 patients (46%). TRPG at low workload was independently associated with TRPG at peak workload (β = 0.67, p < 0.001). Early surgical intervention (within 6 months after ESE) was performed in 65 patients. Of the remaining 58 patients with the watchful waiting strategy, the event free survival was lower in patients with EIPH than in patients without EIPH (48.1 vs. 97.0% at 1-year, p < 0.001). TRPG at low workload ≥ 35.0 mmHg as well as EIPH were associated with poor prognosis in patients with the watchful waiting strategy. In conclusion, the importance of ESE and evaluating EIPH in patients with MR was re-acknowledged. TRPG at peak workload can be predicted by TRPG at low workload, and TRPG at low workload may be useful in real-world clinical settings.
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Mitral Valve Regurgitation Murmurs—Insights from Hemoacoustic Computational Modeling. FLUIDS 2022. [DOI: 10.3390/fluids7050164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mitral regurgitation (MR) is the leakage of blood from the left ventricle into the left atrium during systole through a mitral valve that does not close fully. A systolic murmur is produced by MR and can be used to diagnose this disease. In the current study, we use hemoacoustic simulations to characterize the features of murmurs for a range of severities relevant to chronic MR. The incompressible Navier–Stokes equations are solved using an immersed boundary method to simulate the blood flow. The resultant pressure fluctuations on the lumen wall serve as the source for the murmur, and the murmur propagation through the thorax is modeled as a 3D elastic wave in a linear viscoelastic material. The resulting acceleration on the surface of the thorax is used as a surrogate for the measurement from a stethoscope, and these characteristics of the acceleration signal are examined in detail. We found that the intensity of the MR murmur is lower at the mitral point on the precordium, as compared with the aortic and pulmonic areas. This is somewhat counterintuitive but is supported by other studies in the past. We also found that the intensity of the murmur, as well as the break frequency, are well correlated with the severity of MR, and this information can be useful for automated auscultation and phonocardiographic applications.
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Grayburn PA, Packer M, Sannino A, Stone GW. Disproportionate secondary mitral regurgitation: myths, misconceptions and clinical implications. Heart 2020; 107:heartjnl-2020-316992. [PMID: 33234674 DOI: 10.1136/heartjnl-2020-316992] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 01/17/2023] Open
Abstract
Secondary (functional) mitral regurgitation (SMR) most commonly arises secondary to left ventricular (LV) dilation/dysfunction. The concept of disproportionately severe SMR was proposed to help explain the different results of two randomised trials of transcatheter edge-to-edge mitral valve repair (TEER) versus medical therapy. This concept is based on the fact that effective regurgitant orifice area (EROA) depends on LV end-diastolic volume (LVEDV), ejection fraction, regurgitant fraction and the velocity-time integral of SMR. This review focuses on the haemodynamic framework underlying the concept and the myths and misconceptions arising from it. Each component of EROA/LVEDV is prone to measurement error which can result in misclassification of individual patients. Moreover, EROA is typically measured at peak systole rather than its mean value over the duration of MR. This can result in physiologically impossible values of EROA or regurgitant volume. Although the EROA/LVEDV ratio (1) emphasises that grading MR severity needs to consider LV size and function and (2) helps explain the different outcomes between COAPT and MITRAFR, there are important factors that are not included. Among these are left atrial compliance, LV pressure and ejection fraction, pulmonary hypertension, right ventricular function and tricuspid regurgitation. Because medical therapy can reduce LV volumes and improve both LV function and SMR severity, the key to patient selection is forced titration of neurohormonal antagonists to the target doses that have been proven in clinical trials (along with cardiac resynchronisation when appropriate). Patients who continue to have symptomatic severe SMR after doing so should be considered for TEER.
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Affiliation(s)
- Paul A Grayburn
- Baylor Heart and Vascular Institute, Baylor University Medical Center, Dallas, Texas, USA
| | - Milton Packer
- Baylor Heart and Vascular Institute, Baylor University Medical Center, Dallas, Texas, USA
| | - Anna Sannino
- Baylor Heart and Vascular Institute, Baylor University Medical Center, Dallas, Texas, USA
| | - Gregg W Stone
- The Zena and Michael A. Wiener Cardiovascular Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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Chen B, Liu Y, Zuo W, Li Q, Kong D, Pan C, Dong L, Shu X, Ge J. Three-dimensional transthoracic echocardiographic evaluation of tricuspid regurgitation severity using proximal isovelocity surface area: comparison with volumetric method. Cardiovasc Ultrasound 2020; 18:41. [PMID: 33050922 PMCID: PMC7557073 DOI: 10.1186/s12947-020-00225-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/05/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The quantification of tricuspid regurgitation(TR) using three-dimensional(3D) proximal isovelocity surface area (PISA) derived effective regurgitant orifice area (EROA) is feasible in functional TR. The aim of our study was to explore the diagnostic accuracy and utility of 3D PISA EROA in a larger population of different etiologies. METHODS One hundred and seven patients with confirmed TR underwent 2D and 3D transthoracic echocardiography (TTE). 3D PISA EROA was calculated and EROA derived from 3D regurgitant volume (Rvol) was used as the reference. RESULTS 3D PISA EROA showed better correlation in primary TR than in functional TR(r = 0.897, P < 0.01). 3D PISA EROA differentiated severe TR with comparable accuracy in patients with primary and functional etiology (Z-value 16.506 vs 21.202), but with different cut-offs (0.49cm2 vs. 0.41 cm2). The chi-square value for incorporated clinical symptoms, positive echocardiographic results and 3D PISA EROA to grade severe TR was higher than only included clinical symptoms or incorporated clinical symptoms and positive echocardiographic results (chi-square value 137.233, P < 0.01). CONCLUSION TR quantification using 3D PISA EROA is feasible and accurate under different etiologies. It has incremental diagnostic value for evaluating severe TR.
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Affiliation(s)
- Beiqi Chen
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Shanghai, China
| | - Yu Liu
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Shanghai, China
| | - Wuxu Zuo
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Shanghai, China
| | - Quan Li
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China
| | - Dehong Kong
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Shanghai, China
| | - Cuizhen Pan
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China
| | - Lili Dong
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China. .,Shanghai Institute of Medical Imaging, Shanghai, China. .,Shanghai Institute of Cardiovascular Diseases, Shanghai, China.
| | - Xianhong Shu
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China. .,Shanghai Institute of Medical Imaging, Shanghai, China. .,Shanghai Institute of Cardiovascular Diseases, Shanghai, China.
| | - Junbo Ge
- Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai, China.,Shanghai Institute of Medical Imaging, Shanghai, China.,Shanghai Institute of Cardiovascular Diseases, Shanghai, China
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Grayburn PA, Packer M. The Authors Reply:. JACC Cardiovasc Imaging 2020; 13:1459. [DOI: 10.1016/j.jcmg.2020.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 04/13/2020] [Indexed: 11/16/2022]
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Uretsky S, Aldaia L, Marcoff L, Koulogiannis K, Argulian E, Lasam G, Gillam L. Concordance and Discordance of Echocardiographic Parameters Recommended for Assessing the Severity of Mitral Regurgitation. Circ Cardiovasc Imaging 2020; 13:e010278. [PMID: 32408828 DOI: 10.1161/circimaging.119.010278] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND The American College of Cardiology/American Heart Association and American Society of Echocardiography guidelines recommend assessing several echocardiographic parameters when evaluating mitral regurgitation (MR) severity. These parameters can be discordant, making the assessment of MR challenging. The degree to which echocardiographic parameters of MR severity are concordant is not well studied. METHODS We enrolled 159 patients in a prospective multicenter study. Eight parameters were included in this analysis: proximal isovelocity surface area (PISA)-derived regurgitant volume, PISA-derived effective regurgitant orifice area, vena contracta, color Doppler jet/left atrial area, left atrial volume index, left ventricular end-diastolic volume index, peak E wave, and the presence of pulmonary vein systolic reversal. Each echocardiographic parameter was determined to represent severe or nonsevere MR according to the American Society of Echocardiography guidelines. A concordance score was calculated as [Formula: see text] so that a higher score reflects greater concordance. There was no discordance when all the echocardiographic parameters agreed and high discordance when 3 or 4 parameters were discordant. RESULTS The mean concordance score was 75±14% for the entire cohort. There were 9 (6%) patients with complete agreement of all parameters and 61 (38%) with high discordance. There was greater discordance in patients with severe MR but no difference between primary versus secondary or central versus eccentric jets. There was an improvement in concordance when only considering PISA-based regurgitant volume, PISA-based effective regurgitant orifice area, and vena contracta with agreement in 68% of patients. CONCLUSIONS There was limited concordance between the echocardiographic parameters of MR severity, and the discordance was worse with more severe MR. Concordance improved when considering only 3 quantitative measures of vena contracta and PISA-based effective regurgitant orifice area and regurgitant volume. These findings highlight the challenges facing echocardiographers when assessing the severity of MR and emphasize the difficulty of using an integrated approach that incorporates multiple components. Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT04038879.
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Affiliation(s)
- Seth Uretsky
- Department of Cardiovascular Medicine, Gagnon Cardiovascular Institute, Morristown Medical Center/Atlantic Health System, NJ (S.U., L.A., L.M., K.K., L.G.)
| | - Lillian Aldaia
- Department of Cardiovascular Medicine, Gagnon Cardiovascular Institute, Morristown Medical Center/Atlantic Health System, NJ (S.U., L.A., L.M., K.K., L.G.)
| | - Leo Marcoff
- Department of Cardiovascular Medicine, Gagnon Cardiovascular Institute, Morristown Medical Center/Atlantic Health System, NJ (S.U., L.A., L.M., K.K., L.G.)
| | - Konstantinos Koulogiannis
- Department of Cardiovascular Medicine, Gagnon Cardiovascular Institute, Morristown Medical Center/Atlantic Health System, NJ (S.U., L.A., L.M., K.K., L.G.)
| | - Edgar Argulian
- Department of Medicine, Division of Cardiology, Mount Sinai St. Luke's Hospital, Mount Sinai School of Medicine, New York, NY (E.A., G.L.)
| | - Glenmore Lasam
- Department of Cardiovascular Medicine, Gagnon Cardiovascular Institute, Morristown Medical Center/Atlantic Health System, NJ (S.U., L.A., L.M., K.K., L.G.)
| | - Linda Gillam
- Department of Medicine, Division of Cardiology, Mount Sinai St. Luke's Hospital, Mount Sinai School of Medicine, New York, NY (E.A., G.L.)
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Mewton N, Cucherat M. To clip, or not to clip heart failure patients, that is the question. Eur J Heart Fail 2020; 22:16-19. [PMID: 32003134 DOI: 10.1002/ejhf.1612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/05/2019] [Accepted: 08/16/2019] [Indexed: 11/06/2022] Open
Affiliation(s)
- Nathan Mewton
- University Claude Bernard Lyon, Hospices Civils de Lyon, Hôpital Cardiovasculaire Louis Pradel, Filière Insuffisance Cardiaque & Centre d'Investigation Clinique INSERM 1407, Bron Cedex, France
| | - Michel Cucherat
- Hospices Civils de Lyon, Service de Pharmacologie et de Toxicologie. CNRS, UMR5558, Département Biostatistiques et Modélisation pour la Santé et l'Environnement, Equipe Evaluation et Modélisation des Effets des Médicaments, Laboratoire de Biométrie et Biologie Evolutive, Lyon, France
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Zoghbi W, Adams D, Bonow R, Enriquez-Sarano M, Foster E, Grayburn P, Hahn R, Han Y, Hung J, Lang R, Little S, Shah D, Shernan S, Thavendiranathan P, Thomas J, Weissman N. Recommendations for noninvasive evaluation of native valvular regurgitation
A report from the american society of echocardiography developed in collaboration with the society for cardiovascular magnetic resonance. JOURNAL OF THE INDIAN ACADEMY OF ECHOCARDIOGRAPHY & CARDIOVASCULAR IMAGING 2020. [DOI: 10.4103/2543-1463.282191] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Lee K, Om SY, Lee SH, Oh JK, Park HK, Choi YS, Lee SA, Lee S, Kim DH, Song JM, Kang DH, Song JK. Clinical Situations Associated with Inappropriately Large Regurgitant Volumes in the Assessment of Mitral Regurgitation Severity Using the Proximal Flow Convergence Method in Patients with Chordae Rupture. J Am Soc Echocardiogr 2019; 33:64-71. [PMID: 31668504 DOI: 10.1016/j.echo.2019.08.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 08/24/2019] [Accepted: 08/27/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Regurgitant volume (RVol) calculated using the proximal flow convergence method (proximal isovelocity surface area [PISA]) has been accepted as a key quantitative parameter for the diagnosis of and clinical decision-making with regard to severe mitral regurgitation (MR). However, a recent prospective study showed a significant overestimation of RVol by the echocardiographic PISA method compared with the MR volume measured using magnetic resonance imaging. We aimed to evaluate the frequency of overestimation of RVol by the PISA method and the clinical conditions that require a different quantitative method to correct the overestimation. METHODS We retrospectively enrolled 166 consecutive patients with degenerative MR and chordae rupture, in whom RVol was measured using both the PISA and two-dimensional Doppler volumetric methods. The volumetric method was used to measure total stroke volume using the two-dimensional Simpson biplane method, and forward stroke volume was measured using pulsed Doppler tracing at the left ventricular (LV) outflow tract. RVol by the volumetric method was calculated using total stroke volume - forward stroke volume. Severe MR was defined as an RVol >60 mL. RESULTS All patients had severe MR based on RVol by the PISA method, but 68 (41.1%) showed RVol by the volumetric method values of <60 mL, resulting in discordant results. The patients with discordant results were characterized by a higher prevalence of female sex, lower body surface area, smaller LV diastolic and systolic dimensions and volumes, smaller left atrial volume, smaller PISA angle, and lower frequency of flail leaflets (39.7% vs 62.2%, P = .004). Multivariate analysis revealed that LV end-diastolic volume (LVEDV) and PISA angle were independent factors, with the best cutoff LVEDV and PISA angle being 173 mL and 103°, respectively. During follow-up (median, 3.4 years; interquartile range, 2.0-4.8 years), mitral valve repair and replacement were performed in 103 and six patients, respectively. The 2-year mitral valve surgery-free survival rate was higher in the discordant group (51.8% ± 0.06% vs 31.2% ± 0.05%, P < .001). CONCLUSIONS Even in the patients with documented chordae rupture, the PISA method alone resulted in inappropriate overestimation of MR severity in a significant proportion of patients. Thus, an additive quantitative method is absolutely necessary in patients with a small LVEDV or narrow PISA angle.
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Affiliation(s)
- Kyusup Lee
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sang Yong Om
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sun Hack Lee
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jin Kyung Oh
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Hong-Kyung Park
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Yoon-Sil Choi
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seung-Ah Lee
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sahmin Lee
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Dae-Hee Kim
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jong-Min Song
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Duk-Hyun Kang
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jae-Kwan Song
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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14
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Mao W, Wang Q, Kodali S, Sun W. Numerical Parametric Study of Paravalvular Leak Following a Transcatheter Aortic Valve Deployment Into a Patient-Specific Aortic Root. J Biomech Eng 2019; 140:2683660. [PMID: 30029247 DOI: 10.1115/1.4040457] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 11/08/2022]
Abstract
Paravalvular leak (PVL) is a relatively frequent complication after transcatheter aortic valve replacement (TAVR) with increased mortality. Currently, there is no effective method to pre-operatively predict and prevent PVL. In this study, we developed a computational model to predict the severity of PVL after TAVR. Nonlinear finite element (FE) method was used to simulate a self-expandable CoreValve deployment into a patient-specific aortic root, specified with human material properties of aortic tissues. Subsequently, computational fluid dynamics (CFD) simulations were performed using the post-TAVR geometries from the FE simulation, and a parametric investigation of the impact of the transcatheter aortic valve (TAV) skirt shape, TAV orientation, and deployment height on PVL was conducted. The predicted PVL was in good agreement with the echocardiography data. Due to the scallop shape of CoreValve skirt, the difference of PVL due to TAV orientation can be as large as 40%. Although the stent thickness is small compared to the aortic annulus size, we found that inappropriate modeling of it can lead to an underestimation of PVL up to 10 ml/beat. Moreover, the deployment height could significantly alter the extent and the distribution of regurgitant jets, which results in a change of leaking volume up to 70%. Further investigation in a large cohort of patients is warranted to verify the accuracy of our model. This study demonstrated that a rigorously developed patient-specific computational model can provide useful insights into underlying mechanisms causing PVL and potentially assist in pre-operative planning for TAVR to minimize PVL.
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Affiliation(s)
- Wenbin Mao
- Tissue Mechanics Laboratory, The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30313-2412
| | - Qian Wang
- Tissue Mechanics Laboratory, The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30313-2412
| | - Susheel Kodali
- Division of Cardiology, Columbia University Medical Center, New York 10032
| | - Wei Sun
- Tissue Mechanics Laboratory, The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 206 Technology Enterprise Park, Georgia Institute of Technology, 387 Technology Circle, Atlanta, GA 30313-2412 e-mail:
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Luraghi G, Migliavacca F, García-González A, Chiastra C, Rossi A, Cao D, Stefanini G, Rodriguez Matas JF. On the Modeling of Patient-Specific Transcatheter Aortic Valve Replacement: A Fluid-Structure Interaction Approach. Cardiovasc Eng Technol 2019; 10:437-455. [PMID: 31309527 DOI: 10.1007/s13239-019-00427-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 07/04/2019] [Indexed: 12/14/2022]
Abstract
PURPOSE Transcatheter aortic valve replacement (TAVR) is a minimally invasive treatment for high-risk patients with aortic diseases. Despite its increasing use, many influential factors are still to be understood and require continuous investigation. The best numerical approach capable of reproducing both the valves mechanics and the hemodynamics is the fluid-structure interaction (FSI) modeling. The aim of this work is the development of a patient-specific FSI methodology able to model the implantation phase as well as the valve working conditions during cardiac cycles. METHODS The patient-specific domain, which included the aortic root, native valve and calcifications, was reconstructed from CT images, while the CAD model of the device, metallic frame and pericardium, was drawn from literature data. Ventricular and aortic pressure waveforms, derived from the patient's data, were used as boundary conditions. The proposed method was applied to two real clinical cases, which presented different outcomes in terms of paravalvular leakage (PVL), the main complication after TAVR. RESULTS The results confirmed the clinical prognosis of mild and moderate PVL with coherent values of regurgitant volume and effective regurgitant orifice area. Moreover, the final release configuration of the device and the velocity field were compared with postoperative CT scans and Doppler traces showing a good qualitative and quantitative matching. CONCLUSION In conclusion, the development of realistic and accurate FSI patient-specific models can be used as a support for clinical decisions before the implantation.
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Affiliation(s)
- Giulia Luraghi
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza L. da Vinci 32, 20133, Milan, Italy.
| | - Francesco Migliavacca
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza L. da Vinci 32, 20133, Milan, Italy
| | - Alberto García-González
- Laboratori de Càlcul Numèric (LaCàN), E.T.S. de Ingenieros de Caminos, Canales y Puertos, Universitat Politècnica de Catalunya (UPC), Jordi Girona 1-3, 08034, Barcelona, Spain
| | - Claudio Chiastra
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza L. da Vinci 32, 20133, Milan, Italy.,PoliToBIOMed Lab, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
| | - Alexia Rossi
- Department of Biomedical Sciences, Humanitas University, via Rita Levi Montalcini 4, 20090, Pieve Emanuele, MI, Italy
| | - Davide Cao
- Department of Biomedical Sciences, Humanitas University, via Rita Levi Montalcini 4, 20090, Pieve Emanuele, MI, Italy
| | - Giulio Stefanini
- Department of Biomedical Sciences, Humanitas University, via Rita Levi Montalcini 4, 20090, Pieve Emanuele, MI, Italy
| | - Jose Felix Rodriguez Matas
- Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza L. da Vinci 32, 20133, Milan, Italy
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Kagiyama N, Shrestha S. Echocardiographic assessment of mitral regurgitation. J Med Ultrason (2001) 2019; 47:59-70. [PMID: 31446501 DOI: 10.1007/s10396-019-00971-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 07/24/2019] [Indexed: 12/13/2022]
Abstract
Mitral regurgitation (MR) is one of the most frequent indications for valve surgery in developed countries, and echocardiographic assessment is an essential tool to evaluate its etiologies, severity, and therapeutic indications. The mitral valve apparatus is a complex structure composed of several parts: apart from the mitral valve leaflets and annulus, it also includes the chordae tendineae, papillary muscles, and left ventricular (LV) wall. MR can be caused not only by organic changes of the mitral valve leaflets or chordae (primary MR) but also by extreme mitral annular enlargement or mitral leaflet tethering due to displacement and malfunction of papillary muscles and LV wall (secondary MR). In secondary MR with LV dysfunction, a milder degree of MR can be associated with adverse outcomes compared with primary MR. Grading the severity is the first step in evaluation of indication for surgical/transcatheter interventions. As such, there are several techniques to assess the severity of MR using echocardiography. However, none of the techniques is reliable enough by itself, and it is always recommended to integrate multiple methods. In cases where echocardiographic assessment of MR severity is inconclusive, magnetic resonance may be helpful. In addition to the severity, anatomical information, such as localization in primary MR due to mitral valve prolapse and LV size in secondary MR due to LV dilatation/dysfunction, is an important concern in presurgical echocardiography. Transesophageal echocardiography and three-dimensional echocardiography are key techniques for anatomical evaluation including mitral valve and LV volumes. In transcatheter intervention for MR, echocardiography plays a pivotal role as a guide for procedures and endpoints. In this review article, the authors provide a comprehensive summary of current standards of echocardiographic assessment of MR.
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Affiliation(s)
- Nobuyuki Kagiyama
- West Virginia University Heart and Vascular Institute, 1 Medical Center Drive, Morgantown, WV, 26505, USA.
| | - Sirish Shrestha
- West Virginia University Heart and Vascular Institute, 1 Medical Center Drive, Morgantown, WV, 26505, USA
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Collia D, Zovatto L, Pedrizzetti G. Analysis of mitral valve regurgitation by computational fluid dynamics. APL Bioeng 2019; 3:036105. [PMID: 31893254 PMCID: PMC6932856 DOI: 10.1063/1.5097245] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 07/31/2019] [Indexed: 02/05/2023] Open
Abstract
The clinical syndrome of mitral insufficiency is a common consequence of mitral valve (MV) prolapse, when the MV leaflets do not seal the closed orifice and blood regurgitates back to the atrium during ventricular contraction. There are different types of MV prolapse that may influence the degree of regurgitation also in relation to the left ventricle (LV) geometry. This study aims to provide some insight into the fluid dynamics of MV insufficiency in view of improving the different measurements available in the clinical setting. The analysis is performed by a computational fluid dynamics model coupled with an asymptotic model of the MV motion. The computational fluid dynamics solution uses the immersed boundary method that is efficiently integrated with clinical imaging technologies. Healthy and dilated LVs obtained by multislice cardiac MRI are combined with simplified models of healthy and pathological MVs deduced from computed tomography and 4D-transesophageal echocardiography. The results demonstrated the properties of false regurgitation, blood that did not cross the open MV orifice and returns into the atrium during the backward motion of the MV leaflets, whose entity should be accounted when evaluating small regurgitation. The regurgitating volume is found to be proportional to the effective orifice area, with the limited dependence of the LV geometry and type of prolapse. These affect the percentage of old blood returning to the atrium which may be associated with thrombogenic risk.
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Affiliation(s)
- Dario Collia
- Department of Engineering and Architecture, University of Trieste, P. Europa 1, 34127 Trieste, Italy
| | - Luigino Zovatto
- Department of Engineering and Architecture, University of Trieste, P. Europa 1, 34127 Trieste, Italy
| | - Gianni Pedrizzetti
- Department of Engineering and Architecture, University of Trieste, P. Europa 1, 34127 Trieste, Italy
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18
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Essayagh B, Antoine C, Benfari G, Messika-Zeitoun D, Michelena H, Le Tourneau T, Mankad S, Tribouilloy CM, Thapa P, Enriquez-Sarano M. Prognostic Implications of Left Atrial Enlargement in Degenerative Mitral Regurgitation. J Am Coll Cardiol 2019; 74:858-870. [DOI: 10.1016/j.jacc.2019.06.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/08/2019] [Accepted: 06/03/2019] [Indexed: 01/07/2023]
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20
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Théron A, Morera P, Resseguier N, Grisoli D, Norscini G, Riberi A, Collart F, Habib G, Avierinos JF. Long-term results of surgical treatment of secondary severe mitral regurgitation in patients with end-stage heart failure: Advantage of prosthesis insertion. Arch Cardiovasc Dis 2019; 112:95-103. [PMID: 30600216 DOI: 10.1016/j.acvd.2018.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 06/15/2018] [Accepted: 09/05/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Surgical treatment of secondary mitral regurgitation (SMR) is controversial. AIM To analyse outcome after undersizing annuloplasty (UA) and mitral valve replacement (MVR). METHODS Consecutive patients operated on for severe SMR, with left ventricular ejection fraction (LVEF)<40% and refractory CHF, were included. Endpoints were in-hospital mortality, mid-term cardiovascular (CV) mortality, evolution of LV variables and recurrence of mitral regurgitation (MR). RESULTS 59 patients were included (mean age 65±10 years, preoperative LVEF 36±6%; effective regurgitant orifice [ERO] 41±17 mm2), 41 with ischaemic disease: 12 underwent UA and 47 underwent MVR; only eight had concomitant coronary revascularization. In-hospital mortality was 3.3% (8.3% in UA group; 2.1% in MVR group). Eight-year CV mortality was 39±13% (40±18% in UA group; 27±10% in MVR group). Older age (hazard ratio 1.14, 95% confidence interval 1.07 to 1.22; P<0.001) and LV end-systolic diameter (hazard ratio 1.18, 95% confidence interval 1.09 to 1.27; P<0.001) independently predicted CV mortality. LVEF did not change between the preoperative and follow-up transthoracic echocardiograms in the MVR group (36±6% vs. 35±10%; P=0.6) or the UA group (36±5% vs. 31±12%; P=0.09). Conversely, LV end-diastolic diameter decreased significantly in the MVR group (64±8m to 59±9mm; P=0.002), but not in the UA group (61±7m to 64±10mm; P=0.2). Recurrence of significant MR occurred in 81% of patients in the UA group (mean postoperative ERO 19±6 mm2) versus none in the MVR group. CONCLUSIONS Surgical treatment of SMR can be performed with acceptable operative risk and mid-term survival in severe heart failure, even if there is no indication for revascularization. MVR is associated with significant reverse remodelling, and UA with prohibitive risk of MR recurrence.
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Affiliation(s)
- Alexis Théron
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Pierre Morera
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Noémie Resseguier
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Dominique Grisoli
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Giulia Norscini
- Department of Cardiology, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Alberto Riberi
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Frédéric Collart
- Department of Cardiac Surgery, La Timone Hospital, AP-HM, 13005 Marseille, France
| | - Gilbert Habib
- Department of Cardiology, La Timone Hospital, AP-HM, 13005 Marseille, France
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Prognostic value of exercise stress echocardiography in patients with secondary mitral regurgitation: a long-term follow-up study. J Echocardiogr 2018; 17:147-156. [DOI: 10.1007/s12574-018-0404-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/09/2018] [Accepted: 10/22/2018] [Indexed: 10/28/2022]
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Quien MM, Vainrib AF, Freedberg RS, Bamira DG, Benenstein RJ, Williams MR, Saric M. Advanced Imaging Techniques for Mitral Regurgitation. Prog Cardiovasc Dis 2018; 61:390-396. [PMID: 30321560 DOI: 10.1016/j.pcad.2018.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/10/2018] [Indexed: 11/16/2022]
Abstract
Mitral regurgitation (MR) is one of the most commonly encountered valvular lesions in clinical practice. MR can be either primary (degenerative) or secondary (functional) depending on the etiology of MR and the pathology of the mitral valve (MV). Echocardiography is the primary diagnostic tool for MR and is key in determining this etiology as well as MR severity. While clinicians usually turn to 2 Dimensional echocardiography as first-line imaging, 3 Dimensional echocardiography (3DE) has continually shown to be superior in terms of describing MV anatomy and pathology. This review article elaborates on 3DE techniques, modalities, and advances in software. Furthermore, the article demonstrates how 3DE has reformed MR evaluation and has played a vital role in determining patient management.
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Affiliation(s)
- Mary M Quien
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016
| | - Alan F Vainrib
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016
| | - Robin S Freedberg
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016
| | - Daniel G Bamira
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016
| | - Ricardo J Benenstein
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016
| | - Mathew R Williams
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016
| | - Muhamed Saric
- Leon H. Charney Division of Cardiology, New York University Langone Health, 560 First Avenue, New York, NY 10016.
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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; 31:992-999. [PMID: 29921479 DOI: 10.1016/j.echo.2018.04.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [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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24
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Zürcher F, Brugger N, Jahren SE, de Marchi SF, Seiler C. Quantification of Multiple Mitral Regurgitant Jets: An In Vitro Validation Study Comparing Two- and Three-Dimensional Proximal Isovelocity Surface Area Methods. J Am Soc Echocardiogr 2018; 30:511-521. [PMID: 28274714 DOI: 10.1016/j.echo.2016.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Indexed: 10/19/2022]
Abstract
BACKGROUND The accuracy of the proximal isovelocity surface area (PISA) method for the quantification of mitral regurgitation (MR), in the case of multiple jets, is unknown. The aim of this study was to evaluate different two-dimensional (2D) and three-dimensional (3D) PISA methods using 3D color Doppler data sets. METHODS Several regurgitant volumes (Rvols) were simulated using a pulsatile pump connected to a phantom equipped with single and double regurgitant orifices of different sizes and interspaces. A flowmeter served as the reference method. Transthoracic (TTE) and transoesophageal echocardiography (TEE) were used to acquire the 3D data sets. Offline, Rvols were calculated by 2D PISA methods based on hemispheric and hemicylindric assumptions and by 3D integrated PISA. RESULTS A fusion of the PISA was observed in the setting of narrow-spaced regurgitant orifices; compared with flowmeter, Rvol was underestimated using the single hemispheric PISA model (TTE: Bland-Altman bias ± limit of agreement, -17.5 ± 8.9 mL; TEE: -15.9 ± 7.3 mL) and overestimated using the double hemispheric PISA model (TTE: +7.1 ± 14.6 mL; TEE: +10.4 ± 11.9 mL). The combined approach (hemisphere for single orifice, hemicylinder with two bases for nonfused PISAs, and hemicylinder with one base for fused PISAs) was more precise (TTE: -3.4 ± 6.3 mL; TEE: -1.9 ± 5.6 mL). Three-dimensional integrated PISA was the most accurate method to quantify Rvol (TTE: -2.1 ± 6.5 mL; TEE -3.2 ± 4.8 mL). CONCLUSIONS In the setting of double MR orifices, the 2D combined approach and integrated 3D PISA appear to be superior as compared with the conventional hemispheric method, thus providing tools for the challenging quantification of MR with multiple jets.
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Affiliation(s)
- Fabian Zürcher
- Department of Cardiology, University Hospital, Bern, Switzerland
| | - Nicolas Brugger
- Department of Cardiology, Hôpital Fribourgeois, Fribourg, Switzerland
| | | | | | - Christian Seiler
- Department of Cardiology, University Hospital, Bern, Switzerland.
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Gorodisky L, Agmon Y, Porat M, Abadi S, Lessick J. Assessment of mitral regurgitation by 3-dimensional proximal flow convergence using magnetic resonance imaging: comparison with echo-Doppler. Int J Cardiovasc Imaging 2017; 34:793-802. [PMID: 29260346 DOI: 10.1007/s10554-017-1290-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 12/13/2017] [Indexed: 10/18/2022]
Abstract
To test the feasibility of assessing mitral regurgitation (MR) severity using cardiac magnetic resonance (CMR) 4D velocity vectors to quantify regurgitant volume (RVol) by analysis of the proximal flow convergence, compared to Doppler based proximal isovelocity surface area (PISA) and CMR volume-based methods. In a prospectively designed study, 27 patients with various grades of MR underwent CMR and echo-Doppler on the same day. By CMR, multiple slices were obtained parallel to the mitral valve by phase-contrast imaging, using 3D velocity vectors, as well as short-axis cine images for left and right ventricular volume measurements. Using dedicated software developed in our laboratory, the perimeter of the proximal flow convergence region was semi-automatically measured for each temporal phase, and for each short-axis slice. The CMR-PISA RVol was calculated as the sum of PISA perimeters throughout systole, multiplied by slice width. For comparison, CMR-volumetric RVol was calculated by 2 methods: Volumetric (difference between left and right ventricular stroke volumes) and Flow-based (stroke volume -aortic flow). Echo-PISA RVol was calculated by echo-Doppler based PISA method. RVol by CMR-PISA correlated highly with echo-PISA (r = 0.87) and with CMR-volumetric (r = 0.86) and CMR-flow (r = 0.72). For comparison Doppler-RVol and CMR-volume-based RVol had r = 0.83. On average CMR-PISA was 16 ± 25 ml less than echo-PISA, but 12 ± 22 ml larger than CMR-volumetric RVol. The observed 3D shape of the PISA envelope by 4D-CMR resembled a hemiellipsoid rather than a hemisphere. This feasibility study suggests that CMR-based 4D-PISA may be able to assess MR severity quantitatively without any geometric assumptions.
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Affiliation(s)
- Lior Gorodisky
- Department of Electrical Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Yoram Agmon
- Cardiology Department, Rambam Health Care Campus, Haaliya Street, 31096, Haifa, Israel.,Department of Medicine, Technion-Israel Institute of Technology, Haaliya Street, Haifa, Israel
| | - Moshe Porat
- Department of Electrical Engineering, Technion-Israel Institute of Technology, Haifa, Israel
| | - Sobhi Abadi
- Medical Imaging Department, Rambam Health Care Campus, Haaliya Street, Haifa, Israel
| | - Jonathan Lessick
- Cardiology Department, Rambam Health Care Campus, Haaliya Street, 31096, Haifa, Israel. .,Department of Medicine, Technion-Israel Institute of Technology, Haaliya Street, Haifa, Israel.
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Clemenceau A, Bérubé JC, Bélanger P, Gaudreault N, Lamontagne M, Toubal O, Clavel MA, Capoulade R, Mathieu P, Pibarot P, Bosse Y. Deleterious variants in DCHS1 are prevalent in sporadic cases of mitral valve prolapse. Mol Genet Genomic Med 2017; 6:114-120. [PMID: 29224215 PMCID: PMC5823682 DOI: 10.1002/mgg3.347] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 09/29/2017] [Accepted: 10/23/2017] [Indexed: 01/02/2023] Open
Abstract
Background A recent study identified DCHS1 as a causal gene for mitral valve prolapse. The goal of this study is to investigate the presence and frequency of known and novel variants in this gene in 100 asymptomatic patients with moderate to severe organic mitral regurgitation. Methods DNA sequencing assays were developed for two previously identified functional missense variants, namely p.R2330C and p.R2513H, and all 21 exons of DCHS1. Pathogenicity of variants was evaluated in silico. Results p.R2330C and p.R2513H were not identified in this cohort. Sequencing all coding regions revealed eight missense variants including six considered deleterious. This includes one novel variant (p.A2464P) and two rare variants (p.R2770Q and p.R2462Q). These variants are predicted to be deleterious with combined annotation‐dependent depletion (CADD) scores greater than 25, which are in the same range as p.R2330C (CADD = 28.0) and p.R2513H (CADD = 24.3). More globally, 24 of 100 cases were carriers of at least one in silico‐predicted deleterious missense variant in DCHS1, suggesting that this single gene may account for a substantial portion of cases. Conclusion This study reveals an important contribution of germline variants in DCHS1 in unrelated patients with mitral valve prolapse and supports genetic testing of this gene to screen individuals at risk.
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Affiliation(s)
- Alisson Clemenceau
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | | | - Paméla Bélanger
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Nathalie Gaudreault
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Maxime Lamontagne
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Oumhani Toubal
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Marie-Annick Clavel
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Romain Capoulade
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Patrick Mathieu
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Philippe Pibarot
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada
| | - Yohan Bosse
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Quebec, QC, Canada.,Department of Molecular Medicine, Laval University, Quebec, QC, Canada
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Mitral Valve Prolapse: Multimodality Imaging and Genetic Insights. Prog Cardiovasc Dis 2017; 60:361-369. [PMID: 29122631 DOI: 10.1016/j.pcad.2017.10.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 01/28/2023]
Abstract
Mitral valve prolapse (MVP) is a common heritable valvulopathy affecting approximately 2.4% of the population. It is the most important cause of primary mitral regurgitation (MR) requiring surgery. MVP is characterized by fibromyxomatous changes and displacement of one or both mitral leaflets into the left atrium. Echocardiography represents the primary diagnostic modality for assessment of MVP. Accurate quantitation of ventricular volumes and function for surgical planning in asymptomatic severe MR can be provided with both echocardiography and cardiac magnetic resonance. In addition, assessment of myocardial fibrosis using late gadolinium enhancement and T1 mapping allows better understanding of the impact of MVP on the myocardium. Imaging in MVP is important not only for diagnostic and prognostic purposes, but is also essential for detailed phenotyping in genetic studies. Genotype-phenotype studies in MVP pedigrees have allowed the identification of milder, non-diagnostic MVP morphologies by echocardiography. Such morphologies represent early expression of MVP in gene carriers. This review focuses on multimodality imaging and the phenotypic spectrum of MVP. Moreover, the review details the recent genetic discoveries that have increased our understanding of the pathophysiology of MVP, with clues to mechanisms and therapy.
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28
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Jansen R, Hart EA, Peters M, Urgel K, Kluin J, Tietge WJ, Zwart K, Sybrandy KC, Cramer MJM, Chamuleau SAJ. An easy-to-use scoring index to determine severity of mitral regurgitation by 2D echocardiography in clinical practice. Echocardiography 2017; 34:1275-1283. [PMID: 28833463 DOI: 10.1111/echo.13636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Mitral regurgitation (MR) grading by two-dimensional transthoracic echocardiography is challenging, but important to determine the best treatment strategy in patients with MR. Current guidelines advocate an integrative approach, although no recommendation is provided on how to do so. An easy-to-use index will be helpful for standardized and reproducible MR grading. METHODS Eleven echocardiographic parameters were retrospectively evaluated in 145 patients with moderate or severe MR. Parameters were scored positive or negative for severe MR, where expert panel consensus reading was considered as the reference standard. Logistic regression was performed, and adjusted coefficients were used to create a risk score for severe MR per patient (ROSE-index). The best cutoff with corresponding predictive values was determined. RESULTS Eighty-two percent of all parameters could be determined. Multivariable analysis revealed five parameters that remained significant predictors for severe MR: morphology, jet characteristics, vena contracta, systolic reversal, and left ventricular dimensions. With different weighing, a total score of 8 could be obtained. Median total ROSE-index score for moderate (2.0) and severe MR (5.0) did significantly differ. The cutoff score (≥4) revealed sensitivity 0.84 and specificity 0.83 to diagnose severe MR. Negative predictive value was 100% for score 0 and 1; score 6-8 showed a 100% positive predictive value. Inter- and intra-observer agreements were excellent (K-values >0.80). CONCLUSION Here, we propose an easy-to-use tool for integrated analysis of guideline parameters to assess MR severity. Using this so-called ROSE-index revealed reliable and reproducible assessment of severe MR (cutoff≥4) that may be helpful for clinical decision making.
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Affiliation(s)
- Rosemarijn Jansen
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Einar A Hart
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Max Peters
- Department of Radiotherapy, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kim Urgel
- Department of Cardiology, Amphia Hospital Breda, Breda, The Netherlands
| | - Jolanda Kluin
- Department of Cardiothoracic Surgery, Academic Medical Center Amsterdam, Amsterdam, The Netherlands
| | - Wouter J Tietge
- Department of Cardiology, Diaconessenhuis Hospital Leiden, Leiden, The Netherlands
| | - Koen Zwart
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kirsten C Sybrandy
- Department of Cardiology, St. Jansdal Hospital Harderwijk, Harderwijk, The Netherlands
| | - Maarten J M Cramer
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Steven A J Chamuleau
- Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands
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Corrigan FE, Maini A, Reginauld S, Lerakis S. Contemporary evaluation of mitral regurgitation – 3D echocardiography, cardiac magnetic resonance, and procedural planning. Expert Rev Cardiovasc Ther 2017; 15:715-725. [DOI: 10.1080/14779072.2017.1362981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Frank E. Corrigan
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Aneel Maini
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
| | - Shawn Reginauld
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Stamatios Lerakis
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
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Berdejo J, Shiota M, Mihara H, Itabashi Y, Utsunomiya H, Shiota T. Vena contracta analysis by color Doppler three-dimensional transesophageal echocardiography shows geometrical differences between prolapse and pseudoprolapse in eccentric mitral regurgitation. Echocardiography 2017; 34:683-689. [PMID: 28317206 DOI: 10.1111/echo.13508] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS Evaluation of eccentric mitral regurgitation (MR) remains extremely difficult and the role played by its etiology, functional or degenerative, is not well understood. This study aimed to demonstrate the value of three-dimensional transesophageal echocardiography (3DTEE) in the evaluation of eccentric MR identifying geometric differences in the vena contracta area between functional and degenerative etiologies. METHODS AND RESULTS We studied 61 patients with eccentric MR (30 functional and 31 degenerative). Regurgitant orifice area was determined by the two-dimensional proximal isovelocity surface area (2DPISA) and the 3DTEE methods. The ratio between maximum and minimum lengths of the vena contracta was calculated in each patient. Effective regurgitant orifice area by the 2DPISA method was smaller than that estimated by 3DTEE (0.56±0.21 vs 0.72±0.25 cm2 ). A better correlation between both methods was seen in degenerative mitral regurgitation (DMR; r=.83), with a mean underestimation of 8.2% by the 2DPISA method. A much worse correlation was found in functional mitral regurgitation (FMR; r=.39), where a mean underestimation by the 2DPISA method of 29.1% was observed. There was a more elongated and curved vena contracta in FMR compared to that in DMR (length ratio: 3.4±1.0 vs 2.2±0.7, P<.0001). CONCLUSION Three-dimensional transesophageal echocardiography identifies a more elongated regurgitant orifice in eccentric FMR compared to that in eccentric DMR. This difference may explain the greater underestimation of effective regurgitant orifice area by the 2DPISA method in FMR. High-quality 3DTEE analysis of vena contracta area would be a highly recommended alternative.
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Affiliation(s)
| | - Maiko Shiota
- Cedars-Sinai Heart Institute, Los Angeles, CA, USA
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Kamijima R, Suzuki K, Izumo M, Kuwata S, Mizukoshi K, Takai M, Kou S, Hayashi A, Kida K, Harada T, Akashi YJ. Predictors of Exercise-Induced Pulmonary Hypertension in Patients with Asymptomatic Degenerative Mitral Regurgitation: Mechanistic Insights from 2D Speckle-Tracking Echocardiography. Sci Rep 2017; 7:40008. [PMID: 28071674 PMCID: PMC5223189 DOI: 10.1038/srep40008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 11/30/2016] [Indexed: 01/19/2023] Open
Abstract
Presence of exercise-induced pulmonary hypertension (EIPH) in asymptomatic degenerative mitral regurgitation (DMR) determines prognosis. This study aimed to elucidate the mechanism and predictors of EIPH in asymptomatic DMR. Ninety-one consecutive asymptomatic patients with DMR who underwent exercise stress echocardiography were prospectively included. We obtained various conventional echocardiographic parameters at rest and during peak exercise, as well as left atrial (LA) function at rest using 2-dimensional speckle-tracking analysis. The 25 patients (33.3%) with EIPH were significantly older and had a greater ratio of mitral peak velocity of early filling to early diastolic mitral annular velocity during peak exercise than those without EIPH. LA strain (LAS)-s and LAS-e, indices of LA reservoir and conduit function, respectively, were significantly lower in those with EIPH than in those without EIPH. Multivariate analysis indicated that LAS-s was the only resting echocardiographic parameter that independently predicted EIPH, with a cut-off value of 26.9%. Furthermore, Kaplan-Meier curve analysis showed that symptom-free survival was markedly lower among those with reduced LAS-s. In conclusion, decreased LA reservoir function contributes to EIPH, and LAS-s at rest is a useful indicator for predicting EIPH in asymptomatic patients with DMR.
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Affiliation(s)
- Ryo Kamijima
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Kengo Suzuki
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Masaki Izumo
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Shingo Kuwata
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Kei Mizukoshi
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Manabu Takai
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Seisyou Kou
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Akio Hayashi
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Keisuke Kida
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Tomoo Harada
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Yoshihiro J. Akashi
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
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Shillcutt SK, Tavazzi G, Shapiro BP, Diaz-Gomez J. Pulmonic Regurgitation in the Adult Cardiac Surgery Patient. J Cardiothorac Vasc Anesth 2016; 31:215-228. [PMID: 27712967 DOI: 10.1053/j.jvca.2016.06.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Sasha K Shillcutt
- Department of Anesthesiology, University of Nebraska Medical Center, Omaha, NE.
| | - Guido Tavazzi
- Department of Anesthesia and Intensive Care, Emergency Medicine, University of Pavia Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | | | - Jose Diaz-Gomez
- Department of Critical Care Medicine, Anesthesiology, and Neurosurgery, Mayo Clinic, Jacksonville, FL
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Affiliation(s)
- Peter von Homeyer
- From the Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, Washington
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BARBARESI ELENA, CANNIZZO MARINA, SCHINZARI MATTEO, LONGHI SIMONE, MASETTI MARCO, MINGARDI FRANCESCA, GRIGIONI FRANCESCO, RAPEZZI CLAUDIO, RUSSO ANTONIO. ASSESSMENT OF MITRAL REGURGITATION THROUGH DOPPLER ECHOCARDIOGRAPHY: FEASIBILITY, PITFALLS AND DIAGNOSTIC ADVANTAGES. J MECH MED BIOL 2015. [DOI: 10.1142/s0219519415400114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background: Echodoppler quantification of mitral regurgitation (MR) is still controversial, in particular little is known about correlation between quantitative and semi-quantitative methods. Methods and Results: 95 patients (pts) aged 58 +/- 13 years, 56% male, with at least moderate organic MR were enrolled in the period between Oct 2006 and Nov 2014. The etiology of MR was flail of MV leaflet. Regurgitant volume (RV) and effective regurgitant orifice (ERO) quantified by PISA (RV 56 ± 17 mL, ERO 0.32 ± 0.09 cm2), Doppler (RV 58 ± 17 mL, ERO 0.34 ± 0.12 cm2) and Volumetric (RV 48 ± 17 mL, ERO 0.27 ± 0.1 cm2) methods, were similar, particularly by quantitative Doppler and PISA (R2 0.89, p < 0.001). By semiquantitative methods jet area 4C was 9.1 ± 4.4 cm2, jet area/left atrium (LA) area 41 ± 20%, vena contracta (VC) was 5 ± 4.2 mm; pulmonary vein (PV) systolic flow reversal was present in 44% of patients. Only VC width among semiquantitative methods showed a sufficient correlation with RV (R2 0.52, p < 0.001), weaker with ERO (R2 0.46, p < 0.001). Conclusion: MR should be always evaluated by quantitative methods, particularly doppler and PISA RV and ERO, which showed the best correlation. Among semiquantitative methods only VC width represents a good option to RV or ERO evaluation by quantitative methods.
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Affiliation(s)
- ELENA BARBARESI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - MARINA CANNIZZO
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - MATTEO SCHINZARI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - SIMONE LONGHI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - MARCO MASETTI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - FRANCESCA MINGARDI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - FRANCESCO GRIGIONI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - CLAUDIO RAPEZZI
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - ANTONIO RUSSO
- Cardiology, Department of Experimental, Diagnostic and Specialty Medicine — DIMES, Alma Mater Studiorum, University of Bologna, Bologna, Italy
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Tamada T, Okura H, Yoshida K. New Echo Window to Quantify Eccentric Mitral Regurgitation Using a Transgastric Approach on Transesophageal Echocardiography. Circ J 2015; 79:439-40. [DOI: 10.1253/circj.cj-14-1103] [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: 11/09/2022]
Affiliation(s)
| | | | - Kiyoshi Yoshida
- Division of Cardiology, Sakakibara Heart Institute of Okayama
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Influence of exercise-induced pulmonary hypertension on exercise capacity in asymptomatic degenerative mitral regurgitation. J Cardiol 2014; 66:246-52. [PMID: 25533424 DOI: 10.1016/j.jjcc.2014.11.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 10/29/2014] [Accepted: 11/19/2014] [Indexed: 11/20/2022]
Abstract
BACKGROUND Exercise capacity is helpful in the management of patients with mitral regurgitation (MR). However, the determinants of exercise capacity reduction in MR have remained unclear. This study was designed to objectively assess exercise capacity, identify the echocardiographic predictors of exercise capacity, and investigate its impact on development of symptoms in asymptomatic degenerative MR. METHODS A total of 49 consecutive asymptomatic patients (age, 58.9±13.1 years; 82% males) with at least moderate degenerative MR (effective regurgitant orifice area=0.40±0.14cm(2); regurgitant volume=60.9±19.6mL) underwent the symptom-limited cardiopulmonary exercise testing for assessing exercise capacity (peak oxygen uptake, peak V˙O2; the minute ventilation/carbon dioxide production, V˙E/V˙CO2 slope). All patients also underwent exercise stress echocardiography for detecting exercise-induced pulmonary hypertension (EIPH) defined by systolic pulmonary arterial pressure (SPAP) ≥60mmHg. RESULTS The mean peak V˙O2 was 22.6±5.1mL/kg/min (86.7±14.1% of age, gender-predicted); peak V˙O2 widely varied (48-121% of predicted), and was markedly reduced (<80.4% of predicted) in 24% of the study patients. The patients with EIPH had lower 2-year symptom-free survival than those without EIPH (p=0.003). The multivariable analysis demonstrated that EIPH was an independent echocardiographic determinant of peak V˙O2 (p=0.001) and V˙E/V˙CO2 slope (p=0.021). Furthermore, the area under curve of age- and gender-adjusted exercise SPAP was 0.88 (95% confidence interval: 0.78-0.97) for reduced exercise capacity. CONCLUSIONS In asymptomatic moderate to severe degenerative MR, EIPH was independently associated with exercise capacity and predicted the occurrence of symptoms. Exercise stress echocardiography is an important tool in managing patients with asymptomatic degenerative MR.
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Topilsky Y, Nkomo VT, Vatury O, Michelena HI, Letourneau T, Suri RM, Pislaru S, Park S, Mahoney DW, Biner S, Enriquez-Sarano M. Clinical Outcome of Isolated Tricuspid Regurgitation. JACC Cardiovasc Imaging 2014; 7:1185-94. [DOI: 10.1016/j.jcmg.2014.07.018] [Citation(s) in RCA: 337] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 07/22/2014] [Accepted: 07/24/2014] [Indexed: 11/25/2022]
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Choi WG, Kim SH, Kim SH, Park SD, Baek YS, Shin SH, Woo SI, Kim DH, Park KS, Kwan J. Response of functional mitral regurgitation during dobutamine infusion in relation to changes in left ventricular dyssynchrony and mitral valve geometry. Yonsei Med J 2014; 55:592-8. [PMID: 24719124 PMCID: PMC3990066 DOI: 10.3349/ymj.2014.55.3.592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 06/20/2013] [Accepted: 07/15/2013] [Indexed: 11/29/2022] Open
Abstract
PURPOSE Functional mitral regurgitation (FMR) and myocardial dyssynchrony commonly occur in patients with dilated cardiomyopathy (DCM). The aim of this study was to elucidate changes in FMR in relation to those in left ventricular (LV) dyssynchrony as well as geometric parameters of the mitral valve (MV) in DCM patients during dobutamine infusion. MATERIALS AND METHODS Twenty-nine DCM patients (M:F=15:14; age: 62±15 yrs) with FMR underwent echocardiography at baseline and during peak dose (30 or 40 ug/min) of dobutamine infusion. Using 2D echocardiography, LV end-diastolic volume, end-systolic volume (LVESV), ejection fraction (EF), and effective regurgitant orifice area (ERO) were estimated. Dyssynchrony indices (DIs), defined as the standard deviation of time interval-to-peak myocardial systolic contraction of eight LV segments, were measured. Using the multi-planar reconstructive mode from commercially available 3D image analysis software, MV tenting area (MVTa) was measured. All geometrical measurements were corrected (c) by the height of each patient. RESULTS During dobutamine infusion, EF (28±8% vs. 39±11%, p=0.001) improved along with significant decrease in cLVESV (80.1±35.2 mm³/m vs. 60.4±31.1 mm³/m, p=0.001); cMVTa (1.28±0.48 cm²/m vs. 0.79±0.33 cm²/m, p=0.001) was significantly reduced; and DI (1.31±0.51 vs. 1.58±0.68, p=0.025) showed significant increase. Despite significant deterioration of LV dyssynchrony during dobutamine infusion, ERO (0.16±0.09 cm² vs. 0.09±0.08 cm², p=0.001) significantly improved. On multivariate analysis, ΔcMVTa and ΔEF were found to be the strongest independent determinants of ΔERO (R²=0.443, p=0.001). CONCLUSION Rather than LV dyssynchrony, MV geometry determined by LV geometry and systolic pressure, which represents the MV closing force, may be the primary determinant of MR severity.
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Affiliation(s)
- Woong Gil Choi
- Division of Cardiology, Department of Internal Medicine, Konkuk University College of Medicine, Chungju, Korea
| | - Soo Hyun Kim
- Division of Cardiology, Department of Internal Medicine, Konkuk University College of Medicine, Chungju, Korea
| | - Soo Han Kim
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Sang Don Park
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Young Soo Baek
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Sung Hee Shin
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Sung Il Woo
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Dae Hyeok Kim
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Keum Soo Park
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
| | - Jun Kwan
- Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
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Khoshhal SQ. Usefulness of the multiplanar reformatting mode of three-dimensional echocardiography in evaluating valvular and structural heart disease: An experience from Saudi Arabia. J Saudi Heart Assoc 2013; 26:23-32. [PMID: 24578597 DOI: 10.1016/j.jsha.2013.11.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 10/27/2013] [Accepted: 11/05/2013] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVE The aim of this study is to compare the feasibility and capacity of multiplanar reformatting (MPR) mode of three-dimensional echocardiography (3DE-MPR technique) with two-dimensional echocardiography (2DE) for visualizing morphological details during evaluation of congenital heart disease (CHD). The study also seeks to validate the accuracy of 3DE MPR in determining cardiac valvular lesions and the application of the 3DE-MPR technique in daily clinical practice. METHODS A cross-sectional study was carried out at Madinah Cardiac Centre, Saudi Arabia from May to December 2012. Various forms of CHD were diagnosed in 43 patients by conventional 2DE, and the patients were then examined with the 3DE-MPR technique using dedicated software and a standard protocol. RESULTS Of the 43 patients, 23 (53.5%) were males and 20 (46.5%) females. Their age varied from 30 days to 146 months (mean age, 70.2 months and SD = 42.5 months) and their weight from 4 to 42 kg (mean weight, 20.2 kg and SD = 9.7 kg). The 2DE showed left heart lesions in nine patients (20.9%), right heart lesions in 23 (53.5%), atrial septal defects in five (11.6%) and complex CHD in six patients (14%). The 3DE MPR technique application and analysis was possible in all patients. The study demonstrated the fields where 3DE MPR was of additive value to conventional 2DE for the vena contracta area in valvular regurgitation severity and the planimetry for the valvular stenosis precise estimation, enface views of atrial septal defects with direct visualisation of shape and size of the defect, and segmental analysis of complex CHD using one window. The clinician and surgeon were then able to determine the mechanism and severity of the lesions and thus decide on appropriate treatment and management. CONCLUSION The study demonstrated the usefulness of 3DE-MPR as a complement to conventional 2DE. The technique is a significant technological breakthrough that allows instant visualization of morphological details and precise determination of cardiac valvular lesions, which were less clearly delineated by 2DE alone.
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Affiliation(s)
- Saad Q Khoshhal
- College of Medicine, Taibah University, Al Madinah Al Munawwarah
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Pizarro R, Bazzino OO, Oberti PF, Falconi ML, Arias AM, Krauss JG, Cagide AM. Prospective validation of the prognostic usefulness of B-type natriuretic peptide in asymptomatic patients with chronic severe aortic regurgitation. J Am Coll Cardiol 2013; 58:1705-14. [PMID: 21982316 DOI: 10.1016/j.jacc.2011.07.016] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 06/30/2011] [Accepted: 07/26/2011] [Indexed: 12/31/2022]
Abstract
OBJECTIVES The purpose of this study was to determine the independent and additive prognostic value of B-type natriuretic peptide (BNP) in patients with severe asymptomatic aortic regurgitation and normal left ventricular function. BACKGROUND Early surgery could be advisable in selected patients with chronic severe aortic regurgitation, but there are no uniform criteria to identify candidates who could benefit from this strategy. Assessment of BNP has not been studied for this purpose. METHODS We prospectively evaluated 294 consecutive patients with severe asymptomatic organic aortic regurgitation and left ventricular ejection fraction above 55%. The first 160 consecutive patients served as the derivation cohort and the next 134 patients served as a validation cohort. The combined endpoint was the occurrence of symptoms of congestive heart failure, left ventricular dysfunction, or death at follow-up. RESULTS The endpoint was reached in 45 patients (28%) of the derivation set and in 35 patients (26%) of the validation cohort. Receiver-operator characteristic curve analysis yielded an optimal cutoff point of 130 pg/ml for BNP that was able to discriminate between patients at higher risk in both cohorts. BNP was the strongest independent predictor by multivariate analysis in the derivation set (odds ratio: 6.9 [95% confidence interval: 2.52 to 17.57], p < 0.0001) and the validation set (odds ratio: 6.7 [95% confidence interval: 2.9 to 16.9], p = 0.0001). CONCLUSIONS Among patients with severe asymptomatic aortic regurgitation and normal left ventricular function, BNP ≥130 pg/ml categorizes a subgroup of patients at higher risk. Because of its incremental prognostic value, we believe BNP assessment should be used in the routine clinical evaluation of these patients.
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Affiliation(s)
- Rodolfo Pizarro
- Cardiology Division, Hospital Italiano de Buenos Aires, 4190 Juan D. Perón Street, 1181 Buenos Aires, Argentina.
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Arias A, Pizarro R, Oberti P, Falconi M, Lucas L, Sosa F, Funes D, Cagide A. Prognostic Value of Left Atrial Volume in Asymptomatic Organic Mitral Regurgitation. J Am Soc Echocardiogr 2013; 26:699-705. [DOI: 10.1016/j.echo.2013.03.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Indexed: 11/30/2022]
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Abstract
Echocardiography is undoubtedly one of the main tools used in assessment of mitral regurgitation (MR) because it allows characterization of valvular morphology, assessment of the severity of the regurgitation, and its secondary effects. In this article we present an overview of the echocardiographic assessment of MR.
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Topilsky Y, Vaturi O, Watanabe N, Bichara V, Nkomo VT, Michelena H, Le Tourneau T, Mankad SV, Park S, Capps MA, Suri R, Pislaru SV, Maalouf J, Yoshida K, Enriquez-Sarano M. Real-time 3-dimensional dynamics of functional mitral regurgitation: a prospective quantitative and mechanistic study. J Am Heart Assoc 2013; 2:e000039. [PMID: 23727698 PMCID: PMC3698758 DOI: 10.1161/jaha.113.000039] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Background Three‐dimensional transthoracic echocardiography (3D‐TTE) with dedicated software permits quantification of mitral annulus dynamics and papillary muscle motion throughout the cardiac cycle. Methods and Results Mitral apparatus 3D‐TTE was acquired in controls (n=42), patients with left ventricle dysfunction and functional mitral regurgitation (LVD‐FMR; n=43) or without FMR (LVD‐noMR, n=35). Annulus in both normal and LVD‐noMR subjects displayed saddle shape accentuation in early‐systole (ratio of height to intercommissural diameter, 10.6±3.7 to 13.5±4.0 in normal and 9.1±4.3 to 12.6±3.6 in LVD‐noMR; P<0.001 for diastole to early‐systole motion, P=NS between those groups). In contrast, saddle shape was unchanged from diastole in FMR patients (10.0±6.4 to 8.0±5.2; P=NS, P<0.05 compared to both other groups). Papillary tips moved symmetrically towards to the midanterior annulus in control and LVD‐noMR subjects, maintaining constant ratio of the distances between both tips to midannulus (PtAR) throughout systole. In LVD‐FMR patients midsystolic posterior papillary tip to anterior annulus distance was increased, resulting in higher PtAR (P=0.05 compared to both other groups). Mechanisms of early‐ and midsystolic FMR differed between different etiologies of LV dysfunction. In patients with anterior MI and global dysfunction annular function and dilatation were the dominant parameters, while papillary muscle motion was the predominant determinant of FMR in patients with inferior MI. Conclusions Inadequate early‐systolic annular contraction and saddle‐shape accentuation in patients with impaired LV contribute to early–mitral incompetency. Asymmetric papillary tip movement towards the midanterior annulus is a major determinant of mid‐ and late‐systolic functional mitral regurgitation.
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Affiliation(s)
- Yan Topilsky
- Division of Cardiovascular Diseases, Tel Aviv Medical Center, Rochester, MN 55905, USA
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Hsuan CF, Yu HY, Tseng WK, Lin LC, Hsu KL, Wu CC. Quantitation of the mitral tetrahedron in patients with ischemic heart disease using real-time three-dimensional echocardiography to evaluate the geometric determinants of ischemic mitral regurgitation. Clin Cardiol 2013; 36:286-92. [PMID: 23494571 DOI: 10.1002/clc.22111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 02/09/2013] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Ischemic mitral regurgitation (IMR) is common in ischemic heart disease and results in poor prognosis. However, the exact mechanism of IMR has not been fully elucidated. HYPOTHESIS Quantitation of the mitral tetrahedron using three-dimentianl (3D) echocardiography is capable of evaluating the geometric determinants and mechanisms of IMR. METHODS Forty patients with a history of ST-elevation myocardial infarction at least 6 months earlier were studied. Parameters of mitral deformation and global left ventricular (LV) function and shape were evaluated by 2-dimensional echocardiography. The effective regurgitant orifice (ERO) of IMR was obtained by the quantitative continuous-wave Doppler technique. Three-dimensional (3D) echocardiography was applied to assess the mitral tetrahedron. RESULTS Mitral valvular tenting area (P < 0.001), mitral annular area (P = 0.032), dilation of the LV in diastole, impairment of the LV ejection fraction, and volume of the spherically shaped LV in systole were greater in patients with an ERO ≥20 mm(2) than in those with an ERO <20 mm(2). In the mitral tetrahedron, only the interpapillary muscle roots distance showed a significant difference (P = 0.004). Multivariate analysis with the logistic regression model showed the systolic mitral tenting area (odds ratio [OR]: 280.49, 95% confidence interval [CI]: 4.59-1.72 × 10(4), P = 0.007) and interpapillary muscle distance (OR: 1.50, 95% CI: 1.03-2.19, P = 0.036) to be independent factors in predicting significant IMR (ERO ≥20 mm(2)). CONCLUSIONS 3D echocardiography can be effectively applied in measuring the mitral tetrahedron and evaluating the mechanism of IMR. Mitral valvular tenting and interpapillary muscle distance are 2 independent factors of significant IMR.
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Affiliation(s)
- Chin-Feng Hsuan
- Division of Cardiology, Department of Internal Medicine, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan
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Dulgheru R, Magne J, Lancellotti P, Pierard LA. Dynamic Ischaemic Mitral Regurgitation and the Role of Stress Echocardiography. J Cardiovasc Echogr 2013; 23:10-17. [PMID: 28465878 PMCID: PMC5353439 DOI: 10.4103/2211-4122.117979] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Objective: This paper aims to explain the main mechanisms that cause ischaemic mitral regurgitation (MR), the pathophysiology, and the role played by stress echocardiography in the evaluation of the dynamic component of MR. Introduction: Chronic ischaemic MR is a frequent complication of myocardial infarction (MI), and is associated with a poor prognosis and outcome. The more the severity of ischaemic MR, the lower is the survival rate. In recent times, improvements in the management of the acute phase of MI, has increased the survival rate after MI. This, combined with an increase in the incidence of MI, will probably lead to a higher prevalence of ischemic MR in the next decades. As a consequence, ischaemic MR should be thoroughly understood and promptly identified. Furthermore, it is well recognized that ischaemic MR is dynamic. The best way to explore the dynamic nature of ischaemic MR is exercise stress echocardiography, and this test should probably be integrated in the evaluation and the management of patients with chronic ischaemic MR. Conclusion: Based on our experience, exercise stress echocardiography might be of interest in the following subsets of patients: 1) in patients with left ventricular (LV) dysfunction who present exertional dyspnea out of proportion to the severity of resting LV dysfunction or MR severity, 2) in patients in whom acute pulmonary oedema occurs without any obvious cause; 3) to unmask patients at high risk of mortality and heart failure 4) before surgical revascularization in patients with moderate ischaemic MR and, 5) following surgery, to identify persistence of pulmonary hypertension and explain the absence of functional class improvement.
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Affiliation(s)
- Raluca Dulgheru
- Department of Cardiology, University Hospital, CHU Sart Tilman, Liège, Belgium
| | - Julien Magne
- Department of Cardiology, University Hospital, CHU Sart Tilman, Liège, Belgium
| | | | - Luc A Pierard
- Department of Cardiology, University Hospital, CHU Sart Tilman, Liège, Belgium
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Affiliation(s)
- Paul A Grayburn
- Baylor Heart and Vascular Institute, Baylor University Medical Center, Dallas, TX 75226, USA.
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Cagliyan CE, Davutoglu V, Sari I, Turkmen S, Ozer O, Tanboga IH, Tekin K, Balli M, Akilli RE, Aksoy M. Relation of Mitral Annular Dilation with Dynamic Mitral Regurgitation in Patients with Rheumatic Mitral Regurgitation. Echocardiography 2012; 29:1031-7. [DOI: 10.1111/j.1540-8175.2012.01765.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Abstract
PURPOSE OF REVIEW To review the utility and the latest developments in three-dimensional (3D) echocardiography of mitral valve prolapse. RECENT FINDINGS Although 3D echocardiography was invented in 1974, it did not gain wide clinical acceptance until the introduction of real-time 3D echocardiography in the first decade of the 21st century. Driven by improvements in probe technology and increases in computing power, 3D echocardiography now provides unprecedented images of mitral valve prolapse and its associated mitral regurgitation with no or minimal requirements for image post processing. SUMMARY 3D echocardiography has become the echocardiographic modality of choice for establishing the diagnosis, describing the precise anatomy, and visualization of mitral regurgitant jets in mitral valve prolapse. 3D echocardiography is becoming indispensable in guiding surgical and percutaneous methods of mitral valve repair and replacement.
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