Getting Little Sleep May Be Associated
With Risk Of Heart Disease
less than seven and a half hours per day may be associated with future
risk of heart disease, according to a new article. In addition, a
combination of little sleep and overnight elevated blood pressure
appears to be associated with an increased risk of the disease.
changing lifestyles, people are sleeping less in modern societies,"
according to background information in the article. Getting adequate
sleep is essential to preventing health conditions such as obesity and
diabetes as well as several risk factors for cardiovascular disease
including sleep-disordered breathing and night-time hypertension (high
Eguchi, M.D., Ph.D., at Jichi Medical University, Tochigi, Japan, and
colleagues monitored the sleep of 1,255 individuals with hypertension
(average age 70.4) and followed them for an average of 50 months.
Researchers noted patients' sleep duration, daytime and nighttime blood
pressure and cardiovascular disease events such as stroke, heart attack
and sudden cardiac death.
follow-up, 99 cardiovascular disease events occurred. Sleep duration of
less than 7.5 hours was associated with incident cardiovascular
disease. "The incidence of cardiovascular disease was 2.4 per 100
person-years in subjects with less than 7.5 hours of sleep and 1.8 per
100 person-years in subjects with longer sleep duration," the authors
with shorter sleep duration plus an overnight increase in blood
pressure had a higher incidence of heart disease than those with normal
sleep duration plus no overnight increase in blood pressure, but the
occurrence of cardiovascular disease in those with a longer sleep
duration vs. those with a shorter sleep duration was similar in those
who did not experience an overnight elevation in blood pressure.
conclusion, shorter duration of sleep is a predictor of incident
cardiovascular disease in elderly individuals with hypertension,"
particularly when it occurs with elevated nighttime blood pressure, the
authors note. "Physicians should inquire about sleep duration in the
risk assessment of patients with hypertension."
more information on JAMA, visit http://jama.ama-assn.org