将听诊器放至心前区胸壁，可听到每个正常心动周期由「咚「 、 「哒「两声组成。

Will stethoscopic wall of bosom of the area before be being put to the heart, audibility every normal cardiac cycle by " dong ", " da " two composition.

youdao

将听诊器放至心前区胸壁，可听到每个正常心动周期由「咚「 、 「哒「两声组成。

Will stethoscopic wall of bosom of the area before be being put to the heart, audibility every normal cardiac cycle by " dong ", " da " two composition.

youdao