Mitral Valve Prolapse Publications (6543)

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Mitral Valve Prolapse Publications

2016Dec
Math Biosci
Math Biosci 2016 Dec 28;285:75-80. Epub 2016 Dec 28.
Biological Fluid Dynamics Laboratory, Biomedical Egngineering Faculty, Amirkabir University of Technology, Tehran, Iran.
2016Dec
Int. J. Angiol.
Int J Angiol 2016 Dec 24;25(5):e39-e42. Epub 2014 Jun 24.
Division of Cardiology, Loyola University Medical Center, Chicago, Illinois.

Marfan syndrome (MFS) is an autosomal dominant condition that is caused by abnormal synthesis of connective tissue. The syndrome classically affects the ocular, musculoskeletal, and cardiovascular systems. The most common cardiovascular manifestations include mitral valve prolapse/regurgitation and aortic aneurysms at high risk of rupture and dissection. Read More

However, internal mammary artery (IMA) true aneurysms are rarely reported. In this case report, we describe a 43-year-old male patient with MFS and three previous thoracotomies referred for endovascular repair of bilateral IMA true aneurysms. To the best of our knowledge, there are no cases of endovascular treatment of bilateral IMA true aneurysms reported in the literature.

2016Dec
Skinmed
Skinmed 2016 1;14(6):465-466. Epub 2016 Dec 1.
Department of Dermatology, Saint Louis University School of Medicine, St. Louis, MO.
2016Jul
J. Heart Valve Dis.
J Heart Valve Dis 2016 Jul;25(4):525-526
Department of Thoracic and Cardiovascular Surgery, Research Institute of Clinical Medicine and Biomedical Research Institute, Chonbuk National University Medical School, Jeonju, Chonbuk, South Korea.

Letter to the Editor We read with great interest the report by Inoue et al. (Cusp-level chordal shortening for non-rheumatic mitralanterior leaflet prolapse in a patient with persistent atrial fibrillation. J Heart Valve Dis 2015;24:586-589) that described their mitral valve repair technique for anterior leaflet prolapse (ALP) and perioperative adaptive servo-ventilation (ASV) therapy for preventing the recurrence of atrial fibrillation after the maze procedure. Read More

Latent recurrence of atrial fibrillation after the maze procedure is caused by many factors. ASV therapy is one way to prevent the occurrence of new atrial fibrillation after cardiac surgery. However, a complete biatrial maze procedure should be performed for continued prevention of the recurrence of atrial fibrillation after the maze procedure, and atrial reduction plasty for a huge left atrium may be added.

2017Jan
Ann. Thorac. Surg.
Ann Thorac Surg 2017 Jan;103(1):e29-e30
Department of Surgical Sciences, Division of Cardiac Surgery, Città della Salute e della Scienza di Torino, University of Turin, Turin, Italy.

This case represents the first report of complete elimination of systolic anterior motion by beating-heart implantation of artificial chordae tendineae on a prolapsing and redundant posterior leaflet. Read More

2015Nov
J. Heart Valve Dis.
J Heart Valve Dis 2015 Nov;24(6):752-759
Centre of Cardiothoracic Surgery, University Hospital and Faculty of Medicine of Coimbra, Portugal.

The study aim was to evaluate the immediate and long-term results of surgical treatment of isolated posterior mitral valve leaflet prolapse (PLP), focusing on survival and freedom from recurrent mitral regurgitation (MR).
Between January 1998 and December 2012, a total of 492 consecutive patients (375 males, 117 females; mean age 61.8 ± 12. Read More

1 years; range: 13-86 years) with isolated PLP [304 (61.8%) with myxomatous degeneration; 188 (38.2%) with fibroelastic deficiency] were treated at the authors' institution. Of these patients, 202 (41.1%) were in NYHA class III-IV, and atrial fibrillation was present in 104 (21.1%). Mitral valve repair was achieved in 484 patients (98.4%), resection was performed in 419 (85.2%), and prosthetic ring annuloplasty was used in 436 (88.6%). Concomitant procedures were performed in 153 patients (31.1%), including tricuspid valve repair in 50 (10.2%), aortic valve surgery in 34 (6.9%), and coronary artery bypass grafting (CABG) in 64 (13%).
The hospital mortality rate was 0.2%, and the mean follow up was 7.1 ± 3.9 years. There were 71 late deaths (14.4%), and overall survival at five, 10 and 15 years was 91.7 ± 1.3%, 82.1 ± 2.3% and 64.7 ± 6.1%, respectively. There was no significant difference in long-term survival compared with the age- and gender-matched general population (p = 0.146). Multivariate Cox-proportional hazard analysis showed older age (HR 1.03 per annum), left ventricular dysfunction (HR 2.44), atrial fibrillation (HR 1.96), left ventricular end-diastolic dimension (HR 1.05 per mm) and non-use of prosthetic ring (HR 3.03) as significant predictors of late mortality. Recurrence of moderate or severe MR occurred in 31 patients, six of whom underwent mitral valve reoperation. Predictors of late recurrence of MR were fibroelastic deficiency (HR 2.38), mitral calcification (HR 5.26), posterior leaflet plication (HR 3.58), absence of complete ring annuloplasty (HR 3.84) and systolic pulmonary artery pressure at discharge (HR 1.10 per mmHg). Freedom from mitral valve reoperation at 15 years was 97.4 ± 1.1% CONCLUSIONS: Mitral valve repair in isolated PLP can be achieved in virtually all cases with a very low operative risk and a high durability of repair. Atrial fibrillation or large left ventricles are associated with a poor prognosis. Failure to use a complete ring annuloplasty carries a risk not only for the return of MR but also for survival.

2016Mar

The repair of anterior mitral leaflet prolapse is known to be challenging. Hence, the study aim was to compare the mid-term results of anterior leaflet prolapse (ALP) using chordal transposition with results obtained using chordal replacement with expanded polytetrafluoroethylene (ePTFE) sutures.
Between 1999 and 2012, a total of 96 consecutive patients (mean age 62 years) with ALP underwent mitral valve repair at the authors' institution. Read More

Surgery involved either chordal transposition from the posterior to the anterior leaflet (n = 67), or chordal replacement using ePTFE sutures (n = 29). Clinical, operative and follow up data were recorded prospectively for each patient. The follow up was 100% complete (mean 3.4 years; range 0 to 12.9 years).
Mitral valve repair was accomplished in all patients, with no operative mortality. The durations of cardiopulmonary bypass and aortic cross-clamp were significantly longer in the chordal replacement group. Actuarial overall survival at one, five and 10 years was 95 ± 3%, 87 ± 5% and 82 ± 7% versus 89 ± 6%, 89 ± 6% and 89 ± 6% in the chordal transposition and chordal replacement groups, respectively (p = 0.84). Freedom from reoperation in the two groups at five years was 95 ± 3% and 91 ± 7%, respectively (p = 0.24). The recurrence of moderate or severe mitral regurgitation (MR) (grade ≤2+) and of severe (grade ≤3+) MR was significantly higher in patients who underwent chordal replacement compared to chordal transposition (p = 0.04 and p = 0.01, respectively).
Provided that chordal quality is preserved, chordal transposition is easier and quicker to achieve for ALP repair, and is also durable in the mid term. Chordal replacement offers a satisfying durability even if the recurrence of severe MR appears to be higher. Preferably, both surgical techniques should be mastered to allow valve repair when anatomic conditions prevent chordal transposition.

2016May
J. Heart Valve Dis.
J Heart Valve Dis 2016 May;25(3):323-331
Noninvasive Cardiac Laboratory, Cedars-Sinai Heart Institute, Los Angeles, CA, USA. Electronic correspondence:

The study aim was to investigate the mechanism of mitral regurgitation (MR) in lone atrial fibrillation (AF) patients using three-dimensional (3D) transesophageal echocardiography (TEE).
A retrospective analysis was conducted of 64 patients with AF and a normal left ventricle, and without prolapse of the mitral valve. Among these patients, significant MR was not identified in 33 cases (AF+MR- group) but was present in 31 cases (AF+MR+ group). Read More

The distance from the coaptation to the bending point of the anterior mitral leaflet (AML), where the chorda was attached, was termed the 'bending length'. The ratio of the bending length to the distance from coaptation to anterior mitral annulus was termed the 'bending ratio' (= bending length/coaptation-annulus length). The mitral annular area (MAA) fractional change was defined as follows: (MAA at late systole - MAA at early systole)/MAA at late systole × 100%). Other parameters relating to mitral valve morphology obtained using 3D TEE were measured with commercial software (QLAB, Phillips).
The coaptation length (CL) was smaller in the AF+MR+ group than in the AF+MR- group (p<0.001), and correlated significantly with the anteriorposterior diameter of the mitral annulus (R = 0.286, p = -0.022), MAA at mid-systole (R = -0.269, p = 0.032), MAA fractional change (R = 0.434, p <0.001), and the bending ratio (R = -0.603, p <0.001). With a multivariable analysis, the correlating factors of significant MR in lone AF patients were a decrease in MAA fractional change (p = 0.022) and an increase of the bending ratio (p = 0.009).
Small MAA fractional changes and the distant position of the chordae tendineae on the AML from the coaptation correlated with significant MR in AF patients with normal left ventricular systolic function.