Effect of sleep disorders on the incidence of paroxysmal atrial fibrillation
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Katedra i Klinika Kardiologii, Uniwersytet Medyczny w Lublinie
Oddział Chorób Wewnętrznych z Pododdziałem Kardiologii, Szpital Powiatowy w Strzyżowie
Katedra i Zakład Medycyny Rodzinnej, Uniwersytet Medyczny w Lublinie
Med Og Nauk Zdr. 2012;18(1):27-30
Atrial fibrillation (atrial fibrillation – AF) is the most common supraventricular arrhythmia, which occurs in about 1% of adults. The aim of the study was to assess the relationship between sleep disorders and incidence of paroxysmal AF.

Material and Methods:
The study covered 51 patients with the onset of AF during the night hours (AF-night, mean age 60.8 ± 9.5), and 51 patients in whom the beginning of AF occurred exclusively during the daytime (AF-day, mean age 61.1 ± 11.2). All patients were hospitalized due to the occurrence of a subsequent episode of paroxysmal AF. Clinical data, biochemical parameters, and the results of questionnaires assessing sleep disturbances were taken into consideration.

The groups examined did not differ with respect to age and gender. In the group AF-night, heart failure was observed more frequently (32% vs. 0%, p<0.001), also poor sleep quality (100% vs. 70%, p<0.001), and high risk of obstructive sleep apnea (47% vs. 25%, p<0.001). Correlation was observed between the onset of AF at night and the deterioration of sleep quality (r=0.299, p=0.003), poor sleep quality (r=0.345, p<0.001), severity of insomnia (r =0.306, p =0.002) and high risk of obstructive sleep apnea (r=0.376, p<0.001). In the AF-day group, hypertension was observed more frequently (73% vs. 28%, p=0.005).

Sleep quality is significantly worse in patients with the onset of AF at night. The clinical significance of this relationship requires further studies.

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