It is not fire or smoke inhalation that is the number one irregular cause of death among firefighters, but heart attacks.

在消防员中，导致非正常原因死亡的头号杀手不是火灾或吸入浓烟，而是心脏病。

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A mutation in a brain protein gene may trigger irregular heart beat and sudden death in people with epilepsy, according to new research in the April 14 issue of the Journal of Neuroscience.

根据《The Journal of Neuroscience》4月14日的最新研究，大脑蛋白基因的某个突变会引发癫痫患者心律不齐和猝死。

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While his death was ruled the result of an irregular heartbeat, the autopsy report was sealed amid accusations that abuse of prescription drugs caused the problem.

CNN: Questions swirl about Jackson and medication