Résumé
@#Objective To report the short-term outcomes of a standardized, simplified and reproducible strategy of mitral valvuloplasty (MVP), which was focused on leaflet foldoplasty and anatomic anomalies of congenital mitral regurgitation (MR). Methods Consecutive 74 patients who underwent MVP by our standardized strategy in our institution from 2016 to 2018 were included retrospectively. There were 30 males and 44 females with a median age of 18.5 (6-146) months and weight of 15.4 (7-51) kg. Results Anatomic anomalies of MR included: (1) subvalvular apparatus: 72 (97.3%) patients with mal-connected chordae tendineae, 31 (41.9%) with absent chordae tendineae and 14 (18.9%) with fused or dysplastic papillary muscle; (2) leaflet: 10 (13.5%) patients with cleft of anterior leaflet, 61 (82.4%) with leaflet prolapse including 56 (91.8%) with anterior leaflet prolapse; (3) annulus: 71 (95.9%) patients with annular dilatation. Leaflet foldoplasty was performed in 61 (82.4%) patients with leaflet prolapse. All patients were successfully discharged and 4 (5.4%) patients were with moderate MR. The follow-up time was 22.0 (9.1-41.8) months. During the follow-up period, 3 patients had moderate MR and 1 patient had reoperation for severe MR. All patients were in normal cardiac function with a mean left ventricular ejection fraction of 66.0%±6.1%. In addition, the mean left ventricular end-diastolic dimension was 31.8±6.0 mm, which was significant smaller than that before the operation (t=6.090, P<0.000 1). Conclusion The standardized leaflet foldoplasty with resection of mal-connected chordae tendineae and posterior annuloplasty technique is safe and feasible with favorable short-term outcomes in MR patients.
Résumé
Congenital mitral regurgitation (MR) occurs infrequently and the number of reported adult surgical cases is small. A 77-year-old man presented with an exacerbation of congestive heart failure. He had a 19-year history of receiving medical treatment for MR and atrial fibriration. Transthoracic and transesophageal echo cardiograms revealed severe MR due to the restriction of the posterior mitral leaflet with very short chorda tendanea attached beneath the posterior leaflet preoperatively. We diagnosed this case to have congenital MR (Carpentier type III) in an adult based on the specific findings of echocardiography and mitral valve plasty was thus performed. All the dysplastic chordae of the P2 and P3 in the immovable leaflet region were cut and the reconstructed by the fifth artificial chordae. These procedures successfully allowed the posterior mitral leaflet to recover its normal shape and movability. Postoperative echocardiography showed no further mitral regurgitation and normal leaflet motion.