Sleep apnea and heart disease are closely linked. Untreated obstructive sleep apnea is an independent risk factor for multiple cardiovascular conditions.
How Sleep Apnea Affects the Heart
Each apnea event triggers a cascade of harmful physiological responses:
- Oxygen desaturation — repeated drops in blood oxygen
- Sympathetic surges — spikes in heart rate and blood pressure
- Inflammation — chronic low-grade systemic inflammation
- Oxidative stress — damage to blood vessels
- Intrathoracic pressure changes — mechanical stress on the heart
Cardiovascular Conditions Linked to Sleep Apnea
- Hypertension — sleep apnea is very common in resistant hypertension, and guidelines list it as a cause to look for[1]
- Atrial fibrillation — closely linked, and it may return more often after treatment if sleep apnea is untreated
- Heart failure
- Coronary artery disease
- Stroke — linked to higher risk
- Serious heart rhythm problems — linked in some studies, especially at night
The Role of Treatment
CPAP therapy has been shown to:
- Lower 24-hour blood pressure by about 2 mmHg on average,[2] and by about 5 mmHg in the top number in resistant hypertension[3]
- Possibly help keep atrial fibrillation from coming back
- Improve sleepiness and quality of life; a large trial did not show fewer heart attacks or strokes[4]
If you have heart disease or risk factors, ask your doctor about screening for sleep apnea. Call (512) 931-1575 for an evaluation. For more detail, read how sleep apnea affects heart health.
References
- Yeghiazarians Y, Jneid H, Tietjens JR, et al. Obstructive sleep apnea and cardiovascular disease: a scientific statement from the American Heart Association. Circulation. 2021;144(3):e56-e67. PMID: 34148375. DOI: 10.1161/CIR.0000000000000988
- Hu X, Fan J, Chen S, et al. The role of continuous positive airway pressure in blood pressure control for patients with obstructive sleep apnea and hypertension: a meta-analysis of randomized controlled trials. J Clin Hypertens (Greenwich). 2015;17(3):215-222. PMID: 25582849. DOI: 10.1111/jch.12472
- Labarca G, Schmidt A, Dreyse J, et al. Efficacy of continuous positive airway pressure (CPAP) in patients with obstructive sleep apnea (OSA) and resistant hypertension (RH): systematic review and meta-analysis. Sleep Med Rev. 2021;58:101446. PMID: 33607443. DOI: 10.1016/j.smrv.2021.101446
- McEvoy RD, Antic NA, Heeley E, et al. CPAP for prevention of cardiovascular events in obstructive sleep apnea. N Engl J Med. 2016;375(10):919-931. PMID: 27571048. DOI: 10.1056/NEJMoa1606599
