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[Analysis on clinical characteristics and prognosis of patients with mitral valve prolapse].

Objective: To evaluate the clinical characteristics and prognosis of patients with mitral valve prolapse (MVP). Methods: We retrospectively analyzed the clinical characteristics and prognosis of 148 MVP patients who underwent mitral valve surgery in Fuwai hospital from January 2012 to December 2015.The patients were divided into mucoid degeneration group (52 cases) and without mucoid degeneration group(19 cases) according to pathological examination of leaflets and chordate. Results: The clinical symptoms of MVP patients included dyspnea (59.5%(88/148)), chest distress and pain (52.7%(78/148)), and palpitations (36.5% (54/148)). Mitral valve repair was performed in 144 cases (97.3%), and mitral valve replacement was performed in 4 cases (2.7%). Posterior leaflet prolapse was the most common form of MVP (68.9%, 102/148). Pathological examination revealed myxomatous degeneration in 73.2% patients (52/71), fibrosis in 8.5% patients (6/71), and fibrinoid necrosis in 8.5% patients (6/71). Patients with mucoid degeneration had less atrial fibrillation before surgery (5.8%(3/52) vs. 42.1%(8/19), P <0.01), smaller preoperative left atrium diameter ((43.2±6.5) mm vs. (48.2±8.9) mm, P <0.05), more posterior leaflet prolapse (94.2%(49/52) vs. 63.2%(12/19), P <0.01), redundant chordae (26.9%(14/52) vs. 0, P <0.05) and leaflet thickening (76.9%(40/52) vs. 52.6%(10/19), P <0.05) when compared with patients without mucoid degeneration.Echocardiography examination at the postoperative follow-up of 39.0(22.3, 57.0) months revealed smaller left atrium diameter((38.5±7.1) mm vs. (45.3±8.3) mm, P <0.01), left ventricular end-diastolic diameter ((48.9±6.2) mm vs. (57.5±7.6) mm, P <0.01), reduced left ventricular ejection fraction ((61.2±7.1)% vs. (65.1±6.2)%, P <0.01) and less moderate or severe mitral regurgitation (1.4%(2/148) vs. 100.0%(148/148), P <0.01) compared with the corresponding preoperative values. Conclusions: Dyspnea is the main symptom, and mucoid degeneration characterized by redundant chordae and leaflet thickening are the main pathological features of MVP patients.The surgical treatment of MVP patients is related with satisfactory outcome results.

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