Monday, March 26, 2012

Circadian rhythms linked to sudden cardiac death

A fundamental discovery reported today (February 23) in Nature uncovers the first molecular evidence linking the body's natural circadian rhythms to sudden cardiac death.
Ventricular arrhythmias, or abnormal heart rhythms, are the most common cause of sudden cardiac death: the primary cause of death from heart disease. They occur most frequently in the morning waking hours, followed by a smaller peak in the evening hours. While scientists have observed this tendency for many years, prior to this breakthrough, the molecular basis for these daily patterns was unknown. 

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