Less Sleep Increases Blood Pressure in Night: Study

Those who suffer from sleep deprivation continuously may encounter increased night time blood pressure, facing heart attacks during the nights, says new research.

“For the first time, we demonstrated that insufficient sleep causes increases in night time blood pressure and dampens nocturnal blood pressure dipping,” said lead author Naima Covassin from Mayo Clinic in the US.

The study was based on results from an induced sleep deprivation among the participants who mimicked the sleep loss experienced by many people.

“We know high blood pressure, particularly during the night, is one of the major risk factors for heart disease,” Covassin said.

As part of the study, 8 healthy normal weight participants aged 19 to 36 were put under observation for 16 days as in-patients for 4 days, followed by 9 days of sleep deprivation say just 4 hours of sleep per night or normal seel of 9 hours per night and 3 days of recovery.

In all, 24 blood pressure levels at regular intervals were measured at each study phase. Among those deprived of sleep during night time, systolic (top number) and diastolic (bottom number) blood pressure averaged 115/64 millimeters of mercury (mm Hg) versus 105/57 mm Hg respectively, researchers found.

Another observation was that the expected fall in blood pressure during the night was suppressed when the people had inadequate sleep and their night time heart rate was higher than those with normal sleep.

The findings will be presented at the American College of Cardiology’s 64th Annual Scientific Session in San Diego on March 15.(IANS)

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