Sleep apnoea severity measured over multiple nights was associated with accelerated vascular aging in a large international real-world study using digital home devices.
Researchers analysed data from 29,653 adults across 20 countries who used an under-mattress sleep sensor to monitor obstructive sleep apnoea and snoring, alongside a smart scale that measured aortic–leg pulse wave velocity (PWV), a recognised marker of arterial stiffness and cardiovascular risk. Participants had a mean age of 52±12 years, 84% were male, and mean body mass index was 27.3±4.9 kg/m².
PWV reflects how quickly blood pressure waves travel through the arteries; higher values indicate stiffer arteries and more advanced vascular aging. Cardiovascular disease remains a leading global cause of mortality, and obstructive sleep apnoea has been increasingly implicated as a modifiable risk factor. However, previous studies relying on single-night assessments have produced inconsistent findings.
Sleep apnoea, particularly obstructive sleep apnoea (OSA), occurs when throat muscles intermittently relax and block the airway during sleep. These repeated breathing interruptions reduce oxygen levels in the blood and fragment normal sleep cycles. While fatigue and daytime drowsiness are common symptoms, the long-term cardiovascular consequences are becoming a major concern.
What Is Vascular Ageing?
Vascular ageing refers to the gradual stiffening and reduced elasticity of blood vessels. Healthy arteries are flexible and expand easily to allow smooth blood flow. As people age, arteries naturally stiffen. However, certain conditions — including high blood pressure, diabetes, smoking, and now severe sleep apnoea — may speed up this process.
Accelerated vascular ageing is associated with higher blood pressure, reduced blood flow to vital organs, and an increased risk of heart attack, stroke, and other cardiovascular complications.
What Did the Study Reveal?
Researchers observed that individuals with moderate to severe sleep apnoea showed signs of greater arterial stiffness compared to those with mild or no sleep apnoea. The findings suggest a dose-response relationship — meaning the more severe the sleep apnoea, the greater the impact on blood vessel health.
Repeated drops in oxygen levels during the night appear to trigger oxidative stress and inflammation in the body. Over time, this chronic stress damages the inner lining of blood vessels (the endothelium), impairing their ability to function properly.
How Does Sleep Apnoea Affect the Blood Vessels?
Several mechanisms may explain the connection:
1. Intermittent Oxygen Deprivation
When breathing stops repeatedly during sleep, oxygen levels fall. This stimulates stress responses in the body, including the release of inflammatory chemicals that can harm blood vessels.
2. Increased Sympathetic Nervous System Activity
Sleep apnoea activates the “fight-or-flight” response, raising heart rate and blood pressure. Persistently elevated blood pressure contributes to arterial stiffening.
3. Systemic Inflammation
Chronic inflammation is a known contributor to vascular damage. Severe sleep apnoea may amplify inflammatory pathways, accelerating ageing at the vascular level.
Why This Matters
Cardiovascular disease remains one of the leading causes of death worldwide. Identifying sleep apnoea as a potential driver of early vascular ageing highlights the importance of early diagnosis and treatment.
Many people remain unaware that they have sleep apnoea. Common warning signs include:
- Loud, chronic snoring
- Gasping or choking during sleep
- Excessive daytime sleepiness
- Morning headaches
- Difficulty concentrating
Risk factors include obesity, large neck circumference, smoking, alcohol use, and family history.
Can Treatment Help?
The good news is that sleep apnoea is treatable. Continuous Positive Airway Pressure (CPAP) therapy is the most common treatment for moderate to severe cases. CPAP keeps the airway open during sleep, improving oxygen levels and reducing cardiovascular strain.
Lifestyle changes such as weight loss, regular exercise, avoiding alcohol before bedtime, and sleeping on one’s side may also improve symptoms and overall heart health.
The link between sleep apnoea severity and vascular ageing underscores that this condition is more than just a sleep disorder. It may silently accelerate damage to blood vessels and increase long-term heart risk.
If you experience persistent snoring or daytime fatigue, seeking medical evaluation could protect not only your sleep quality but also your cardiovascular health.
Disclaimer: This article provides general information and is not a substitute for professional medical advice. Always consult a healthcare provider for diagnosis and treatment.
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