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随着心胸外科手术的进步,目前不仅能对一些简单的先天性心脏畸形行根治手术,对复杂畸形的矫治手术也日趋增多。先天性心脏病不仅心脏、大血管或房室瓣可有畸形,其房室传导系统,包括房室结、希氏束及其分支的位置和走向也可有明显变异。因此复杂畸形的心内直视手术容易损伤房室传导系统,严重影响术后病残率和病死率。有报告,复杂心内直视手术后完全性房室传导阻滞发生率可高达40％,死亡率可达35％。
With the progress of cardiothoracic surgery, it is not only able to cure some simple congenital heart malformations, but also to increase the number of corrective operations for complex deformities. Congenital heart disease not only the heart, large blood vessels or atrioventricular valve may have deformity, the atrioventricular conduction system, including the atrioventricular node, His bundle and its branches of the location and direction may also have significant variation. Therefore, complicated deformity of the heart open surgery can easily damage the atrioventricular conduction system, seriously affecting the postoperative morbidity and mortality. There are reports of complicated open heart surgery complicated by atrioventricular block incidence of up to 40%, the mortality rate of up to 35%.