室颤 shìchàn ventricular fibrillation Origin Definitions Defs Strokes Stroke Words Sentences Sents 室 shì abbreviation of 心室 xīnshì ventricle The lower chambers of the heart that pump blood into the arteries.颤 顫 chàn verb abbreviation of 颤动 顫動 chàndòng to vibrate to vibrate, quiver, or shake rapidly and continuously