Circadian Rhythm and Sudden Cardiac Death Timing: Why Fatal Heart Attacks Peak in Early Morning Hours
Sudden cardiac death (SCD) and fatal myocardial events show time-of-day variation, a phenomenon best explained by circadian biology and acute physiological triggers. The central clinical observation—often tested in epidemiologic studies—is that cardiac risk is not evenly distributed across the day. Instead, the highest incidence tends to cluster during the early morning, commonly between about 6… Read More »