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正常人的心跳是很有规律的，一般是每分钟７０～８０次。但是，当心脏病发作时，这种正常的秩序就打乱了，以致心跳急剧加快，严重时可出现心室或心房的纤维性颤动。心脏一旦由跳动转变为颤动，也就预示生命危在旦夕。因此，防止心脏病发作，是医生和患者的共同心愿。要实现这?
Normal heartbeat is very regular, usually 70 to 80 times per minute. However, when a heart attack occurs, this normal order is disturbed, leading to rapid heartbeat. In severe cases, ventricular or atrial fibrillation may occur. Once the heart changes from beating to trembling, it indicates that life is at stake. Therefore, to prevent a heart attack is the common aspiration of doctors and patients. To achieve this?