Henrik Fox1, Thomas Bitter2, Dieter Horstkotte2, Olaf Oldenburg2. 1. Department of Cardiology, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany. akleemeyer@hdz-nrw.de. 2. Department of Cardiology, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Georgstrasse 11, 32545, Bad Oeynhausen, Germany.
Abstract
AIMS: Sleep-disordered breathing (SDB), in particular obstructive sleep apnoea, is associated with an increased risk of onset or recurrence of atrial fibrillation (AF) and atrial flutter. This prospective study investigated the relationship between restoration of sinus rhythm and SDB in patients with AF or atrial flutter. METHODS AND RESULTS: 138 consecutive patients (age 67.8 ± 10.3 years, 67.4 % male) with AF (86.2 %) or atrial flutter (13.8 %) were enrolled and underwent multichannel cardiorespiratory polygraphy the night before and immediately after electrical cardioversion (CV). None of the patients was treated with ventilation therapy before or during the study. Overall prevalence of SDB [apnoea-hypopnoea index (AHI) ≥5/h] was 92 % and prevalence of moderate-to-severe SDB (AHI) ≥15/h was 64 %. Within the first night after CV, AHI decreased from 23.4 ± 16.3 to 16.3 ± 11.5/h, p < 0.001. This was due to a significant decrease in central respiratory events, with a total reduction of patients showing central sleep apnoea (n = 53 at baseline vs n = 23 immediately after CV; p < 0.001). CONCLUSIONS: In conclusion, SDB represents a highly prevalent comorbidity in patients with atrial arrhythmias. Through cardioversion, an immediate reduction of SDB can be detected due to a significant reduction in central respiratory events.
AIMS: Sleep-disordered breathing (SDB), in particular obstructive sleep apnoea, is associated with an increased risk of onset or recurrence of atrial fibrillation (AF) and atrial flutter. This prospective study investigated the relationship between restoration of sinus rhythm and SDB in patients with AF or atrial flutter. METHODS AND RESULTS: 138 consecutive patients (age 67.8 ± 10.3 years, 67.4 % male) with AF (86.2 %) or atrial flutter (13.8 %) were enrolled and underwent multichannel cardiorespiratory polygraphy the night before and immediately after electrical cardioversion (CV). None of the patients was treated with ventilation therapy before or during the study. Overall prevalence of SDB [apnoea-hypopnoea index (AHI) ≥5/h] was 92 % and prevalence of moderate-to-severe SDB (AHI) ≥15/h was 64 %. Within the first night after CV, AHI decreased from 23.4 ± 16.3 to 16.3 ± 11.5/h, p < 0.001. This was due to a significant decrease in central respiratory events, with a total reduction of patients showing central sleep apnoea (n = 53 at baseline vs n = 23 immediately after CV; p < 0.001). CONCLUSIONS: In conclusion, SDB represents a highly prevalent comorbidity in patients with atrial arrhythmias. Through cardioversion, an immediate reduction of SDB can be detected due to a significant reduction in central respiratory events.
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