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- W2336699286 abstract "A disorder in the physiological structure of the sleep cycles (macrostructure) is known to occur both in patients with sleep apnoea (SA) and coronary heart disease (CHD). The study presented here was concerned with the problem whether the sleep structure in patients suffering from CHD and apnoea-conditioned hypoxia is greatly disturbed e.g. by myocardial ischaemia. Polysomnographic recordings including EEG, EOG, EMG and 6-channel ECG were performed for 6 nights in 30 patients suffering from sleep apnoea (AI > 10/h) and/without CHD. The average age of the patients was 57.9 years (range 47-68 yrs). The 2nd, 4th and 6th nights were subjected to fine analysis. In 6 patients it was possible to detect a total of 144 episodes with nocturnal myocardial ischaemia, 123 of these during cumulative apnoea and oxygen desaturation. The 30 patients spent on the average 67.1% in sleep stages I and II, 14.9% in deep sleep (stages III and IV) and 18% in REM sleep. 77.8% of the ischemie, episodes occurred during REM sleep and only 1.4% during the deep sleep stages. Sleep during myocardial ischaemia showed significantly more arousals than to control periods without ischaemia. There was furthermore a dependence of the degree of arousal on the degree of oxygen desakivations during apnoea. I. Patients suffering from CHD and sleep apnoea are endangered by nocturnal hypoxia-conditioned myocardial ischaemia which in turn can lead to increased electrical instability. II. The macrostructure of the sleep of patients suffering from CHD and sleep apnoea is comparatively as disturbed as that of patients with apnoea without CHD.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2336699286 date "1993-03-01" @default.
- W2336699286 modified "2023-09-27" @default.
- W2336699286 title "[Nocturnal hypoxia--its relevance with reference to sleep structure in patients with coronary heart disease]." @default.
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