报告经心音图证实的收缩期喀喇音21例,内19例作超声心动图检查,17例显示二尖瓣脱垂,余4例病因不明,表明有喀喇音者大多存在二尖瓣脱垂。但少数健康人孤立、无症状及其他检查阳性发现的喀喇音,并非一定是病理性的。文中对喇喀音的特点及有关鉴别诊断作了扼要讨论。 The report confirmed by systolic diastolic click sound card 21 cases of 21 cases, 19 cases were examined by echocardiography, 17 cases showed mitral valve prolapse, the remaining four cases of unknown etiology, indicating that most of the bellows have mitral valve off Vertical However, a few healthy people isolated, asymptomatic and other check positive Kara-tone, not necessarily pathological. In this paper, the characteristics of Lausanne and related differential diagnosis were briefly discussed.