Sleep Apnea and Cardiovascular Disease: Telling the Tale from the Cardiologist's Point of View-Sleep Apnea and Cardiovascular Disease: Recording

Video Transcription

Video Summary

Dr. Virend Somers reviewed obstructive sleep apnea (OSA) from a cardiovascular perspective, explaining how intermittent hypoxemia, autonomic activation, sleep disruption, and pressure changes can promote inflammation, endothelial dysfunction, hypertension, arrhythmias, and other cardiovascular disease.<br /><br />OSA is common among people with coronary artery disease, atrial fibrillation, diabetes, and resistant hypertension. Its association with cardiovascular disease does not always mean it is the cause, so treatment may not improve every patient’s blood pressure or cardiovascular risk. Those most likely to benefit include patients who are excessively sleepy, have substantial hypoxic burden, are younger, or use CPAP consistently.<br /><br />Studies link OSA to heart attacks and sudden cardiac death during nighttime hours. Excessive daytime sleepiness may help identify patients at elevated cardiovascular risk. CPAP has not consistently reduced cardiovascular events in major trials, partly because participants often had low adherence and were not the sleepiest or most hypoxic patients; adherent use may reduce stroke risk. Stopping CPAP may increase risk.<br /><br />Weight-loss approaches, including bariatric surgery and incretin-based medications, can improve OSA and blood pressure, though cardiovascular-outcome evidence is still developing. Women may be underdiagnosed and should not be assumed to be at low risk.<br /><br />In discussion, Somers noted that an Epworth Sleepiness Scale score of 11 or higher generally indicates sleepiness, hypoxic burden may be more informative than oxygen nadir, and persistent sleepiness after effective OSA treatment warrants evaluation for other disorders.

Keywords

obstructive sleep apnea

cardiovascular disease

intermittent hypoxemia

CPAP adherence

hypertension

atrial fibrillation

hypoxic burden

weight loss therapy

daytime sleepiness