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A report published in the November 10 issue of Archives of
Internal Medicine finds that people who sleep less than 7.5
hours per day may have a higher future risk of heart disease. Kazuo
Eguchi, M.D., Ph.D. (Jichi Medical University, Tochigi, Japan) and
colleagues also find an increased risk of heart disease among people
who have little sleep combined with overnight elevated blood pressure.
Sleep is becoming a rarer commodity in today’s world even though it is
likely to have preventive powers against ailments such as obesity and
diabetes. "Reflecting changing lifestyles, people are sleeping
less in modern societies," write the authors. They also point out that
inadequate sleep - and conditions such as sleep-disordered breathing
and night-time high blood pressure (hypertension) - are risk factors
for cardiovascular disease.
Eguchi and colleagues studied the sleeping behaviors of 1,255
individuals with hypertension for about 50 months. The sample was about
70.4 years of age, on average. The research team collected details on
each patient such as sleep duration, daytime and nighttime blood
pressure, and events indicating cardiovascular disease such as stroke,
heart attack, and sudden cardiac death.
In the total sample, there were 99 cardiovascular disease events during
follow-up. Those who slept for less than 7.5 hours were more likely to
develop incident cardiovascular disease. The authors add that, "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 researchers also noticed high rates of heart disease in patients
who both slept for shorter durations and had overnight increases in
blood pressure compared to patients with normal sleep duration and no
overnight blood pressure increase. However, among participants who did
not experience an overnight elevation in blood pressure, the
occurrence of cardiovascular disease was similar for those with longer
and shorter sleep durations.
"Shorter duration of sleep is a predictor of incident cardiovascular
disease in elderly individuals with hypertension," conclude the
authors. This predictor is strongest when combined with elevated
nighttime blood pressure. "Physicians should inquire about sleep
duration in the risk assessment of patients with hypertension."
Short Sleep Duration as an Independent Predictor of
Cardiovascular Events in Japanese Patients With Hypertension
Buy viagra pills Kazuo Eguchi; Thomas G. Pickering; Joseph E. Schwartz; Satoshi Hoshide;
Joji Ishikawa; Shizukiyo Ishikawa; Kazuyuki Shimada; Kazuomi Kario
Archives of Internal Medicine (2008); 168[20]:
pp. 2225-2231.
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Here to View Abstract
Written by: Peter M Crosta
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