Circadian System Disruptions in Sleep Apnea Increase the Risk of Nighttime Cardiac Events
- New research shows that people with untreated sleep apnea experience a sharp nighttime drop in blood vessel function driven by the circadian system, increasing vulnerability to heart attacks and other cardiac events
- In a tightly controlled sleep-lab study, participants' arteries showed their worst ability to dilate around 3:00 a.m., revealing an 82% decline in vascular function during the biological night
- This impairment persisted even after adjusting for blood flow, sleep quality, and apnea severity, confirming the circadian system — not behavior or breathing events — directly weakens vascular health at night
- The findings help explain why people with sleep apnea experience more nighttime cardiac events, contrasting with the general population's morning peak in heart attacks and sudden cardiac death
- Researchers emphasize that understanding circadian timing may help refine cardiovascular treatments for sleep apnea patients, including optimizing medication schedules to enhance nighttime vascular protection
You May Also Like
Por el Placer de Vivir con el Dr. Cesar Lozano
Uforia Podcasts
Let me bore you to sleep
Jason Newland
Podcasts Archives - Extreme Health Radio
Justin Stellman
The Neurodivergant Connection / Stories
Reid
Redefining Strength Podcast
Cori Lefkowith
Get Sleepy: Sleep meditation and stories
Slumber Studios
Let me bore you to sleep - Jason Newland
Jason Newland
Hypnosis for sleeping deeply (Jason Newland)
Jason Newland
Find Your Daily Calm
Sel Gaston
Your Life Nutrition Podcast
Brittany Liberatore, RDN
Por el Placer de Vivir con el Dr. Cesar Lozano
Uforia Podcasts
Let me bore you to sleep
Jason Newland
Podcasts Archives - Extreme Health Radio
Justin Stellman
The Neurodivergant Connection / Stories
Reid
Redefining Strength Podcast
Cori Lefkowith
Get Sleepy: Sleep meditation and stories
Slumber Studios
Let me bore you to sleep - Jason Newland
Jason Newland
Hypnosis for sleeping deeply (Jason Newland)
Jason Newland
Find Your Daily Calm
Sel Gaston
Your Life Nutrition Podcast
Brittany Liberatore, RDN
Community discussion