Cardiac rehabilitation and a sleep medicine
Approximately half of the patients with cardiovascular disease have clinically significant sleep disorders as obstructive sleep apnea (OSA), central sleep apnea – Cheyne-Stokes respiration, chronic nocturnal hypoxemia. OSA is the most frequent.
400-500 episodes of apnea (pauses in breathing) for a total of 3-4 hours during sleep causes by the periodic upper airway collapse. Clinically, the disease manifests with a loud snoring followed periodic pauses in breathing. Severe OSA gives a 5-fold increase in cardiovascular mortality.
In patients with low left ventricular ejection fraction and symptomatic heart failure who experience shortness of breath, inability to exercise, fatigue the diagnostics of central sleep apnea can reach 40%.
Sleep apnea significantly worsens the prognosis of heart failure and quality of life. At the same time, respiratory support is an effective forms of management for sleep apnea.