Objective: to expound the mechanism of Valsalvamaneuver to treat supraventricular tachycardia.
目的：为阐明瓦氏动作在终止室上速过程的作用机制。
2
Instruct clients with history of cardiovascular disease to exhale during defecation (Valsalvamaneuver can cause cardiac arrest).
嘱有心脏病史病人排便时呼气(瓦尔·萨尔瓦操作会导致心脏停博)。
3
It often presents as a soft painless mass, especially in pediatric populations and its appearance may sometimes be altered by position and when performing the Valsalvamaneuver.