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En-Ting Chang, MD

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

In an excellent study, Eguchi et al show that short sleep duration (<7.5 hours) is associated with increasing incident cardiovascular disease (CVD) risk, especially when combined with the "riser pattern" (defined when mean systolic blood pressure was higher during sleep than when awake), in Japanese patients.¹ Although the data have limitations in relation to polysomnography, snoring, or the use of hypnotics, the study provided an important message about the roles of sleep duration and riser pattern in the higher incidence of CVD such as stroke, fatal or nonfatal myocardial infarction, and sudden cardiac death. However, we did not know the daytime nap duration in this study.

As in most of the different ethnicities in Asia, elderly Japanese have a custom of taking daytime naps (siesta). Although there is some controversy over the effect of daytime naps, many of the studies presented the adverse effects of the daytime . . . [Full Text of this Article]

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