进行慢径路改良，观察手术前后房室结的前传有效不应期和文氏阻滞点的改变。

The anterograde effective refractory period and Wenckebach block point were measured before and after ablation.

youdao

进行慢径路改良，观察手术前后房室结的前传有效不应期和文氏阻滞点的改变。

The anterograde effective refractory period and Wenckebach block point were measured before and after ablation.

youdao