Abstract

ARCOS, JOSÉ P et al. Respiración periódica y apneas del sueño centrales en pacientes con insuficiencia cardíaca: hallazgos clínicos y fisiológicos. Rev.Urug.Cardiol. [online]. 2008, vol.23, n.3, pp.249-257. ISSN 1688-0420.

Introduction: sleep breathing disorders are common in general population and particularly among patients with severe heart failure. The occurrence of Cheyne Stokes periodic breathing with central apneas (RPCS-AC) during sleep, worsens the prognosis and significantly increases short term mortality. The objective of this study was to determine the prevalence of this disorder and the clinic-physiological features of patients in our hospital. Methods: thirty-five consecutive patients with heart failure, without periodic respiration during wakefulness were studied with polisomnography, echocardiogram, spirometry, arterial blood gases and functional outcomes of sleep. Results: thirteen patients were diagnosed with RPCS-AC (37%). Patients with RPCS-AC had significantly more fragmented sleep (ID)/h = 32,9 ± 19,4 versus 15,8 ± 14,3, p<0,001); more time in superficial sleep (S1-2 = 77,4 ± 20,1% versus 63,0 ± 16,7%, p = 0,029); less time in paradoxical sleep (REM = 9,9 ± 6,3% versus 16,6 ± 9,8%, p = 0,035) and more time in severe hypoxia during sleep (TA<90% = 28,4 ± 29,0% versus 2,4 ± 4,7%, p = 0,008). There were no differences in cardiac function, EGG, spirometry, arterial blood gases during wakefulness, neither in sleep functional outcomes. Conclusions: RPCS-AC is a frequent disorder in advanced heart failure patients, that causes adverse consequences on sleep structure and arterial oxygenation.

Keywords : SLEEP BREATHING DISORDERS; CENTRAL SLEEP APNEA; HEART FAILURE.

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