Objective To discuss the influence of preexcatation syndrome on QRS middle vector and its clinical significance.

目的探讨预激综合征对QRS中间向量的影响及临床意义。

youdao

Objective To discuss the influence of preexcatation syndrome on QRS middle vector and its clinical significance.

目的探讨预激综合征对QRS中间向量的影响及临床意义。

youdao