Insufficient Sleep Increases Risk of Cardiovascular Disease: Study
...t a mere four hours of shut-eye each night. The electrocardiograms revealed that all of the volunteers had a much faster heart beat and significantly less heart rate variability following the nights of sleep deprivation. Heart rate variability describes the naturally occurring beat-to-beat changes in heart rate whic......d colleagues from the University of Baltimore, the electrocardiograms of 6,222 patients at baseline and at the end of the 4.5 year-long study were compared for the presence, regression or development of LVH. Cardiovascular outcomes such as MI, stroke and heart failure were also evaluated. Among 92.9 per cent of the p......d colleagues from the University of Baltimore, the electrocardiograms of 6,222 patients at baseline and at the end of the 4.5 year-long study were compared for the presence, regression or development of LVH. Cardiovascular outcomes such as MI, stroke and heart failure were also evaluated. Among 92.9 per cent of the p......ients had been diagnosed with depression and their electrocardiograms were compared to those of 366 patients who were not depressed. Depression was clearly linked to lower heart rate variability (HRV), which is a strong predictor of death following a heart attack. HRV measures the nervous functioning - electrical wir...