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When sleep is Disturbed, Risk of Stroke and Heart Attack is Increased Significantly

The following research abstract from The European Heart Journal, leads to the inescapable conclusion that a barking dog next door, or any other noise for that matter, that reduces the amount of sleep you are getting to less than seven hours per night, puts you at much greater risk for suffering a stroke and/or a heart attack.

That is to say that that barking dog in the next yard over could literally be killing you.

Sleep duration predicts cardiovascular outcomes: a systematic review and meta-analysis of prospective studies

An abstract from The European Heart Journal

This study aimed to assess the relationship between duration of sleep and morbidity and mortality from coronary heart disease (CHD), stroke, and total cardiovascular disease (CVD).

Methods and results: Cooper, D'Elia, Strazzullo, and Miller, performed a systematic search of publications using MEDLINE (1966­2009), EMBASE (from 1980), the Cochrane Library, and manual searches without language restrictions. Studies were included if they were prospective, follow-up >3 years, had duration of sleep at baseline, and incident cases of CHD, stroke, or CVD. Relative risks (RR) and 95% confidence interval (CI) were pooled using a random-effect model. Overall, 15 studies (24 cohort samples) included 474 684 male and female participants (follow-up 6.9­25 years), and 16 067 events (4169 for CHD, 3478 for stroke, and 8420 for total CVD). Sleep duration was assessed by questionnaire and incident cases through certification and event registers. Short duration of sleep was associated with a greater risk of developing or dying of CHD (RR 1.48, 95% CI 1.22­1.80, P < 0.0001), stroke (1.15, 1.00­1.31, P = 0.047), but not total CVD (1.03, 0.93­1.15, P = 0.52) with no evidence of publication bias (P = 0.95, P = 0.30, and P = 0.46, respectively). Long duration of sleep was also associated with a greater risk of CHD (1.38, 1.15­1.66, P = 0.0005), stroke (1.65, 1.45­1.87, P < 0.0001), and total CVD (1.41, 1.19­1.68, P < 0.0001) with no evidence of publication bias (P = 0.92, P = 0.96, and P = 0.79, respectively).

Conclusion: Both short and long duration of sleep are predictors, or markers, of cardiovascular outcomes

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