心脏冠状动脉的病变或畸形可以导致猝死，这方面已有多篇报导。但由窦房结动脉单纯狭窄引起猝死的报道罕见，现特报告两例如下：例一：２０岁男性，湖南人，在广州做民工，领工资后购好回家乡的火车票，准备第二天回故里，当天上午１０点钟突然晕倒，当医生赶到抢救时，发现已 Heart coronary artery disease or deformity can lead to sudden death, there have been many reports in this regard. However, the report of stenosis caused by stenosis of sinoatrial node artery is rare, and two cases are reported as follows: Example 1: 20-year-old male, from Hunan Province, a migrant worker working in Guangzhou and bought a train ticket back to his hometown after receiving his salary, Days back home, suddenly fainted 10 o’clock that morning, when the doctor rushed to the rescue, found it