Sudden Cardiac Death: Time of Day Link Found in Mice
By James Gallagher, BBC NEWS
How the time of day can increase the risk of dying from an irregular heartbeat has been identified by researchers.
The risk of "sudden cardiac death" peaks in the morning and rises again in the evening.
A study published in the journal Nature suggests that levels of a protein which controls the heart's rhythm fluctuate through the day.
A body clock expert said the study was "beautiful".
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