Regional biomechanical and histological characterization of the mitral valve apparatus: Implications for mitral repair strategies

2016 ◽  
Vol 49 (12) ◽  
pp. 2491-2501 ◽  
Author(s):  
Nicholas Roberts ◽  
Lucrezia Morticelli ◽  
Zhongmin Jin ◽  
Eileen Ingham ◽  
Sotirios Korossis
Keyword(s):  
Mitral Valve ◽  
Mitral Repair

A Complex Mitral Valve Reconstruction: A Case Report

2005 ◽  
Vol 6 (2) ◽  
pp. 27
Author(s):  
Dimitrios Buklas ◽  
Massimo Massetti ◽  
Eric Saloux ◽  
Eugenio Neri ◽  
Olivier LePage ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Surgical Techniques ◽  
Mitral Valve Insufficiency ◽  
Left Ventricular ◽  
Mitral Valve Reconstruction ◽  
Mitral Repair ◽  
Valve Reconstruction ◽  
Valve Insufficiency ◽  
Valve Function ◽  
Valvular Function

Several techniques are currently in use for mitral valve reconstruction. We report a mitral repair case in which the use of a combination of different surgical techniques resulted in the necessary correction. A 47-year-old woman underwent surgical intervention to treat severe mitral valve insufficiency due to A1/A2/A3 and P2 prolapsed valve tissue. A combination of quadrangular resection, sliding leaflet, single chordal transposition, "flip-over" leaflet, and ring annuloplasty techniques were applied, and postsurgical correct valve function was documented by results of a left ventricular saline filling test and transesophageal echocardiography control. Complex mitral valve repairing techniques can be combined to reestablish valvular function.

ECHOCARDIOGRAPHY PREDICTORS OF SUCCESSFUL MITRAL VALVE REPAIR IN DEGENERATIVE MITRAL VALVE REGURGITATION

2015 ◽  
pp. 77-82
Author(s):  
Ba Minh Du Le ◽  
Anh Vu Nguyen ◽  
Duc Phu Bui
Keyword(s):  
Mitral Valve ◽  
Transesophageal Echocardiography ◽  
Success Rate ◽  
Mitral Valve Repair ◽  
Transthoracic Echocardiography ◽  
Mitral Valve Prolapse ◽  
Posterior Leaflet ◽  
Valve Repair ◽  
Mitral Repair ◽  
Fibroelastic Deficiency

Background and aim of the study: Mitral repair is now as the treatement of choice in patients suffering mitral regurgitation due to mitral valve prolapse or flail. However, mitral valve repair demands the mitral valve morphology being feasible for repair. The study aims at evaluating transthoracic and transesophageal echocardiographic features in consecutive patients with mitral valve prolapse or flail undergoing surgical repair at Hue Central Hospital. The correlation between preoperative and intraoperative echocardiographic features and surgical findings in these patients. These echocardiographic data may predict the surgical outcome. Methods: From December 2010 to January 2013, 73 patients (37 men, 36 women; average age 37.5) were recruited into the study. All patients had degenerative mitral valve disease causing important regurgitation and underwent systematic preoperative transthoracic echocardiography, preoperative and intraoperative transesophageal echocardiography for delineation of six segments (scallops) of anterior and posterior leaflets. Results: Among 73 patients, 64 patients were in fibroelastic deficiency (87.7%) and 9 patients suffered Barlow disease (12.3%). Mitral valve repair was performed in 52 patients (71.2%) and mitral replacement was performed in 21 patients (28.8%). All 52 mitral valve repair (81.3%) and 12 mitral valve replacement (18.7%) was performed in fibroelastic deficiency patients. All 9 Barlow patients must undergo mitral valve replacement (100%). A prolapse or flail of mitral valve in 73 patients was documented by transthoracic and transesophageal echocardiography and confirmed on surgical inspection. Accuracy of transthoracic echocardiography was (89.0%) and accuracy of transesophageal echocardiography was (91.8%) in identifying mitral valve segments prolapse or flail. Success rate of mitral valve repair was (98.0%) in prolapse of 1 or 2 segments, but was low (36.0%) in prolapse > 3 segments. Success rate of mitral valve repair was (96.6%) in prolapse of posterior leaflet, but was (63.6%) in prolapse anterior leaflet or bileaflet. Conclusion: - Mitral valve repair was favorable in fibroelastic deficiency patients, but difficult in Barlow patients. - Accuracy of transthoracic and transesophageal echocardiography was high in identifying mitral valve segments prolapse or flail. - Success rate of mitral valve repair was high in prolapse of 1 or 2 segments. - Success rate of mitral valve repair was high in in prolapse of posterior leaflet. Key words: Mitral repair, echocardiography, degenerative, Barlow, fibroelastic deficiency, prolapse, flail

Robotic Septal Myectomy Without Anterior Leaflet Incision during Mitral Valve Repair

2019 ◽  
Vol 14 (3) ◽  
pp. 281-285 ◽  
Author(s):  
Burak Onan ◽  
Ersin Kadirogullari ◽  
Zeynep Kahraman ◽  
Onur Sen
Keyword(s):  
Mitral Valve ◽  
Mitral Valve Repair ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Da Vinci Surgical System ◽  
Systolic Anterior Motion ◽  
Anterior Leaflet ◽  
Valve Repair ◽  
Septal Myectomy ◽  
Mitral Repair

Bulging subaortic septum in hypertrophic cardiomyopathy is a potential risk factor for systolic anterior motion after mitral valve repair. Systolic anterior motion may cause postoperative mitral regurgitation and left ventricular outflow tract obstruction despite conservative management. During “minimally invasive endoscopic” and “robotic” mitral repair procedures, systolic anterior motion is prevented with concomitant septal myectomy through the mitral valve orifice. Technically, the exposure of the bulging subaortic septum is traditionally done with detachment of the anterior mitral leaflet from its annulus, leaving a 2-mm rim of leaflet attached to the annulus. The leaflet is then sutured after myectomy. As an alternative technique in robotic surgery, the exposure of the subaortic septum is feasible without anterior leaflet incision with the use of dynamic atrial retractor in mitral repair procedures. Here, we present a patient who underwent concomitant robotic mitral valve repair with posterior chordal implantation, ring annuloplasty, and septal myectomy without anterior leaflet incision using the da Vinci surgical system.

scholarly journals Characterization of Degenerative Mitral Valve Disease: Differences between Fibroelastic Deficiency and Barlow’s Disease

2021 ◽  
Vol 8 (2) ◽  
pp. 23
Author(s):  
Aniek L. van Wijngaarden ◽  
Boudewijn P. T. Kruithof ◽  
Tommaso Vinella ◽  
Daniela Q. C. M. Barge-Schaapveld ◽  
Nina Ajmone Marsan
Keyword(s):  
Mitral Valve ◽  
Mitral Regurgitation ◽  
Mitral Valve Disease ◽  
Patient Management ◽  
Valve Disease ◽  
Common Cause ◽  
Barlow’S Disease ◽  
Primary Mitral Regurgitation ◽  
Fibroelastic Deficiency

Degenerative mitral valve disease causing mitral valve prolapse is the most common cause of primary mitral regurgitation, with two distinct phenotypes generally recognized with some major differences, i.e., fibroelastic deficiency (FED) and Barlow’s disease. The aim of this review was to describe the main histological, clinical and echocardiographic features of patients with FED and Barlow’s disease, highlighting the differences in diagnosis, risk stratification and patient management, but also the still significant gaps in understanding the exact pathophysiology of these two phenotypes.

Early and Mid-term Results of Mitral Valve Repair in Patients with Degenerative Mitral Regurgitation

2021 ◽  
Author(s):  
Hasan Erdem ◽  
Emre Selçuk
Keyword(s):  
Mitral Valve ◽  
Mitral Regurgitation ◽  
Mitral Valve Repair ◽  
Survival Rates ◽  
Mitral Valve Regurgitation ◽  
Valve Repair ◽  
Repair Rate ◽  
Mitral Repair ◽  
Mid Term Results

Objectives: In this study, we present the mid-term results of patients who underwent valve repair due to degenerative mitral valve regurgitation in the first five years of our mitral valve repair program. Patients and Methods: In this retrospective study, all patients who were operated for degenerative mitral regurgitation by a single surgical team between 2013 and 2017 were investigated. We determined early and mid-term cumulative survival rates, repair failure and freedom from reoperation. In addition, as a specific subgroup, the results of patients under 18 years of age after mitral valve repair were investigated Results: Mitral repair was performed in 121 of 153 degenerative mitral regurgitation patients during the study period. The overall repair rate was 79%. Mitral valve repair rate increased significantly over years. The Median follow-up time was 63 (range 10-92) months. Early mortality was 2.5% (n=3 patients). During the follow-up period, moderate-to-severe mitral regurgitation was observed in 14 (11.8%) patients, mitral valve reoperation was required in 7 (5.9%) patients. Valve repair was performed in 4 of 7 patients under the age of 18. There was no pediatric case requiring reoperation during the follow-up period (median 46 months). Conclusion: Mid-term results of mitral valve repair in degenerative mitral valve patients are satisfactory. The success rate of repair increases in line with surgical experience.

scholarly journals Microinvasive Mitral Valve Surgery: A New Frontier to Tackle Mitral Regurgitation

2021 ◽  
Author(s):  
Solomon Seifu ◽  
Eduardo de Marchena
Keyword(s):  
Mitral Valve ◽  
Mitral Regurgitation ◽  
Mitral Valve Repair ◽  
Mitral Valve Surgery ◽  
Valve Surgery ◽  
Repair System ◽  
Valve Repair ◽  
Mitral Repair ◽  
New Frontier ◽  
Clinical Benefits

Microinvasive, catheter-based mitral valve repair of severe mitral regurgitation utilizes less invasive approaches with less procedural morbidity and mortality. The procedural steps and clinical benefits of the transcatheter transapical mitral valve annuloplasty (AMEND mitral repair implant) and transcatheter transapical chordal repair systems (Neochord DS 1000 device and Harpoon Mitral Valve Repair System) are reviewed in this manuscript.

Validation of a Fluid-Structure Interaction Model for the Characterization of Transcatheter Mitral Valve Repair Devices

2021 ◽  
Vol 7 (2) ◽  
pp. 605-608
Author(s):  
Robert Ott ◽  
Alper Ö Öner ◽  
Paul Hermann Bellé ◽  
Finja Borowski ◽  
Klaus-Peter Schmitz ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Flow Conditions ◽  
Valve Repair ◽  
Structure Interaction ◽  
Device Implantation ◽  
Transcatheter Mitral Valve Repair ◽  
Vitro Data ◽  
In Vitro Data

Abstract Mitral regurgitation (MR) is the second most frequent indication for heart valve surgery and catheter interventions. According to European and US-American guidelines, transcatheter mitral valve repair in general and transcatheter edge-to-edge repair (TEER) in particular may be considered as a treatment option for selected high-risk patients. However, the biomechanical impact of TEERdevices on the mitral valve (MV) has not yet been fully understood. To address this problem, a 3D-Fluid-Structure Interaction (FSI) framework utilizing non-linear Finite Element Analysis (FEA) for the MV apparatus and Smoothed Particle Hydrodynamics (SPH) for the pulsatile fluid flow was developed and validated against in vitro data. An artificial MV-model (MVM) with a prolapse in the A2-P2 region and a custom-made TEER device implanted in the A2-P2 region were used for the in vitro investigations. In accordance with ISO 5910, projected mitral orifice areas (PMOA), flow rates as well as atrial and ventricular pressures were measured under pulsatile flow conditions before and after TEER device implantation. For the FSI-model, the MVM geometry was reconstructed by means of microcomputed tomography in a quasi-stress-free configuration. Quasi-static tensile test data was utilized for the development of linear- and hyperelastic material models of the chordae tendineae and leaflets, respectively. The fluid flow was modelled assuming an incompressible, homogenous Newtonian behaviour. Time-varying in vitro transmitral pressure loading was applied as a boundary condition. In vitro investigations show that TEER device implantation in the A2-P2 region effectively reduces the regurgitation fraction (RF) from 55 % to 13 %. Moreover, the comparison of experimental and numerical data yields a deviation of 2.09 % for the RF and a deviation of 0.40 % and 6.47 % for the maximum and minimum PMOA, respectively. The developed FSI-framework is in good agreement with in vitro data and is therefore applicable for the characterization of the biomechanical impact of different TEER devices under pulsatile flow conditions.

Robotic Artificial Chordal Replacement for Repair of Mitral Valve Prolapse

2009 ◽  
Vol 4 (4) ◽  
pp. 229-232 ◽  
Author(s):  
Louis A. Brunsting ◽  
J. Scott Rankin ◽  
Kimberly C. Braly ◽  
Robert S. Binford
Keyword(s):  
Mitral Valve ◽  
Surface Area ◽  
Current Method ◽  
Balloon Occlusion ◽  
Fourth Generation ◽  
Invasive Approach ◽  
Long Term Stability ◽  
Mitral Repair ◽  
Mitral Prolapse ◽  
Chordal Replacement

Artificial chordal replacement (ACR) has emerged as a superior method of mitral valve repair with excellent early and late efficacy. It is also ideal to combine with robotic techniques for correction of mitral prolapse, and this article presents a current method of robotic Gore-Tex ACR. Patients with isolated posterior leaflet prolapse are approached with the fourth-generation DaVinci robotic system and endoaortic balloon occlusion. A pledgetted anchor stitch is placed in a papillary muscle, and a 2-o Gore-Tex suture is passed through the anchor pledget. After full annuloplasty ring placement, the Gore-Tex suture is woven into the prolapsing segment and positioned temporarily with robotic forceps. Chordal length is then “adjusted” by lengthening or shortening the temporary knot over 1-cm increments as the valve is tested by injection of cold saline into the ventricle. After achieving good leaflet position and valve competence, the chord is tied permanently. The “adjustable” ACR procedure preserves leaflet surface area and produces a competent valve in the majority of patients. Postoperative transesophageal echo shows a large surface area of coaptation. Patient recovery is facilitated by the minimally invasive approach, while long-term stability of similar open ACR techniques have been excellent with a 2% to 3% failure rate over 10 years of follow-up. Robotic Gore-Tex ACR without leaflet resection is a reproducible procedure that simplifies mitral repair for prolapse. The outcomes observed in early robotic applications have been excellent. It is suggested that most patients with simple prolapse might validly be approached in this manner.

Prophylactic LVAD Enabling High-Risk Mitral Repair—Extending Beyond the Guidelines

2019 ◽  
Vol 14 (6) ◽  
pp. 573-576
Author(s):  
Fadi Hage ◽  
Ali Hage ◽  
Stuart Smith ◽  
A. Dave Nagpal ◽  
Michael W. A. Chu
Keyword(s):  
High Risk ◽  
Mitral Valve ◽  
Mitral Regurgitation ◽  
Cardiogenic Shock ◽  
Clinical Symptoms ◽  
Left Ventricular ◽  
Lv Function ◽  
Assist Device ◽  
Mitral Repair ◽  
Lv Dysfunction

Both surgical and percutaneous mitral repair remain contraindicated in patients with severe degenerative mitral regurgitation (DMR) with severe left ventricular (LV) dysfunction because of inadequate LV reserve and increased LV work with a competent mitral valve. We report a 55-year-old gentleman who presented in cardiogenic shock with missed severe DMR and severe LV dysfunction, in whom we performed a high-risk mitral repair and insertion of a prophylactic CentriMag LV assist device. This innovative approach was found to be successful with significant patient improvement in both LV function and clinical symptoms with a competent mitral valve.

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