改良腱索转移法治疗二尖瓣前叶脱垂(附16例临床分析)

Objective To introduce an operative technique for prolapse of the anterior leaflet of mitral valve. Methods From January 2002 through May 2005, chordal transfer and "edge-to-edge" technique was performed in 16 cases with serious mitral valve re- gurgitation due to prolapse of the anterior leaflet. The etiology was chordal rupture in 12 cases and chordtal elongation in 4. The mean regurgitation area yam (14.76±3.28) cn2. Left ventricular ejection fraction (LVEF) was 33% - 69% before operation. Among those patients, 5 were in NYHA function class Ⅲ and 11 in class Ⅳ. Operations were performed under general anesthesia and car- diopulmonary bypass. First, "edge to edge" technique was performed. The free edge of the prolapsed anterior leaflet was sutyred to corresponding posterior leaflet. Then quadrangular resection was performed to transfer segment of posterior leaflet with its attached chordae. At last, the posterior leaflet was approximated after quadrangular resetion. Echocardiography was performed in each patient before discharge and at the times of follow-up. Results All patients survived the operation. One patient nequired mitral valve re- placement due to anterior leaflet perforation 3 days after the operatiom. The rest were free from reoperation. At the time d follow-up, all these patients were in NYHA functional class Ⅰ. Echocardiography showed neither stenosis nor significant regurgitation of the mitral valve. The cross-sectional area of the mitral valve was 3.3 -4.8 cm2[mean(3.78±0.52)cm2]. The mean regurgitation area was (0.45±0.22) cm2. Both dimension of left atrium and left vantricule reduced significantly. The diameter of left atrium was (48.26± 11.12) mm pre-operation vs. (37.57±9.56) mm post-operation (P=0.028). The ead-diastolic diameter of the left ventricule was (61.43±8.24)mm pre-operation vs (42.35±10.79) mm post-operation (P = 0.008). Conctusion Chordal transfer and "edge- to-edge" technique provides good results for repair of anterior leaflet prolapse of mitral valve.

Chordal transfer and "edge-to-edge" technique for prolapse of anterior leaflet of mitral valve in 16 cases