CPAP Lowers CVD Risk When Used at Least Four Hours Nightly
Obstructive sleep apnea (OSA) is a known risk factor for heart attack. People with OSA stop breathing hundreds of times a night, causing their blood oxygen levels to drop and stressing the heart and cardiovascular (CV) system. CPAP can be treated with continuous positive airway pressure (CPAP), which forces air into the airways and prevents the throat from collapsing during sleep. Whether CPAP reduces CV risk has not been determined.