Sleep dysfunction in heart failure.
Chronic congestive heart failure is a highly prevalent and progressive disorder associated with excess morbidity and mortality; it has huge economic impact. Left heart failure may be systolic or may occur as isolated diastolic dysfunction. The diastolic form predominates in older people. Sleep disorders are frequent in both types. Most systematic studies have been performed in patients with systolic heart failure. Prospective studies show the presence of obstructive and central sleep apnea, periodic limb movements, and significant alterations in sleep architecture, characterized by poor efficiency, excess stage 1 and arousals, and lack of deep sleep. Both obstructive sleep apnea and central sleep apnea occur in patients with heart failure and have been shown to be associated with excess mortality. Obstructive sleep apnea is best treated with continuous positive airway pressure (CPAP) devices. Central sleep apnea is also best treated with CPAP, but only about 50% of the patients are considered responders. Survival improves when heart failure patients are effectively treated with CPAP for both central and obstructive sleep apnea. A new positive airway pressure device, a pressure support servo-ventilator, is the next best choice for heart failure patients whose central sleep apnea does not respond to CPAP. Nocturnal oxygen should be used for patients whose central sleep apnea does not respond to positive pressure devices. Both periodic limb movements and insomnia could have adverse hemodynamic consequences for the failing heart. There are no guidelines or long-term studies regarding treatment of these conditions in heart failure. For restless legs syndrome with or without periodic limb movements, pramipexole and ropinirole have been approved. Treatment of insomnia comorbid with heart failure depends on the cause. In the absence of any known cause, a trial of ramelteon is the first choice.
Javaheri
Shahrokh
S
Shahrokh Javaheri, MD Sleepcare Diagnostics, 4780 Socialville-Fosters Road, Cincinnati, OH 45040, USA. Javaheri@snorenomore.com.
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