Heart rate variability: an important new risk factor in patients following myocardial infarction.

摘要: After acute myocardial infarction, cardiac autonomic, and particularly parasympathetic, activity decreases, followed by a gradual return toward normal over the next few weeks months. The easiest measureable index of autonomic is heart rate variability, which can be assessed in number different ways. Where variability low after long-term survival considerably reduced, independent other known risk factors. This may caused patchy denervation, rendering more susceptible to potentially fatal arrhythmias. Prophylactic drug therapy might reduce mortality patients with variability.