severe arrhythmia

• 严重心律失常

severe arrhythmia的用法和样例：

例句

1. When associated with palpitations, any of these symptoms indicates an abrupt drop in cardiac output and denotes a serious arrhythmia or underlying organic heart disease.
   这些症状若伴有心悸，则表明有心排血量的急骤下降，是严重心律失常的标志，或提示有器质性基础心脏病。