When you have never experienced insomnia, or when there is no excitement or anxiety for no reason, it may be a signal of myocardial infarction. This kind of insomnia is not like ordinary insomnia, but a sudden awakening in the middle of the night without warning, with thoughts like Ma Benteng or unexplained fears. 6. Increased heartbeat

If you suddenly find that your heart beats faster for no reason without any inducement, the duration is between 1 minute and 1 minutes. And often appear after physical activity, emotional excitement or overeating. We should be alert that this may be an indication of myocardial infarction from the body.