The shock index (SI) is simply calculated as heart rate (HR;beats per minute) divided by systolic blood pressure (SBP;mmHg), and it is a sensitive indicator of left ventricular dysfunction.

• 摘要休克指数是以每分钟心跳数除以收缩压（单位：毫米汞柱）而得，它是左心室功能异常的敏感指标。