There was obvious difference between the patients with so-called lone AF and the normal group only in the tissue Doppler parameters of mitralring(P<0.05).
孤立 性 房颤组只有 二尖瓣环组织多普勒运动曲线上的参数与对照组差异有统计学意义（P<0.05）。
2
Aim: To assess the effect of the totally flexible prosthetic ring in mitral and tricuspid annuloplasty.
目的：评价全软成形环在二尖瓣关闭不全瓣环成形术中的作用。
3
Two cases of congenital supravalvular mitral stenosing ring proved by surgery were reported.