New analysis explains how sleep shapes coronary heart disease and what to do about it

A sweeping review of recent studies links poor sleep to a higher risk of coronary heart disease (CHD)—and explains why sleep now sits alongside diet, exercise, and blood pressure on the American Heart Association’s list of “Life’s Essential 8.” The authors highlight two patterns with the strongest ties to heart problems: short sleep and common sleep disorders such as insomnia and obstructive sleep apnea (OSA).  

What the review found

• Short nights, higher risk. Consistently sleeping under ~6 hours a night is associated with more angina, heart attacks, and major cardiac events; several cohorts and meta‑analyses point to a dose–response pattern where each hour less sleep nudges risk upward. The evidence for very long sleep is mixed, but the clearest signal of harm is on the short‑sleep end.  
• Sleep quality matters—sometimes more than duration. People reporting poor sleep quality face higher odds of developing CHD and of worse outcomes after a cardiac event, even when they log “normal” hours.  
• Sleep disorders are common and underdiagnosed.
  • Insomnia is linked to more heart attacks and a higher chance of repeat cardiac events.  
  • OSA—marked by loud snoring and repeated breathing pauses—affects a large share of people with CHD and is tied to more hospitalizations and major adverse cardiac events; CPAP treatment improves symptoms and blood pressure, though trials are mixed on whether it lowers heart events.  
  • Restless legs syndrome may also raise risk in some patients, though evidence is still evolving.  

Why sleep affects the heart

The review maps several biological “pressure points” that chronic sleep loss or fragmented sleep can activate—inflammation, oxidative stress, overactive stress (sympathetic) nerves, metabolic and hormonal shifts (insulin resistance, weight gain), and a tendency to clot. Together, these changes can accelerate atherosclerosis and make plaques more likely to rupture. A diagram on page 2 of the paper illustrates these pathways from sleep problems to CHD.  

What this means for you

• Aim for 7–9 hours of mostly uninterrupted sleep and a consistent schedule. If you routinely get <6 hours, your heart could benefit from moving closer to the sweet spot.  
• Check your sleep quality. Trouble falling or staying asleep, frequent awakenings, or waking unrefreshed are not “just part of life”—they’re treatable and relevant to heart health.  
• Screen for OSA if you snore loudly, gasp at night, or feel very sleepy by day—especially if you already have high blood pressure, diabetes, or heart disease. CPAP can improve symptoms and blood pressure and may help long‑term risk for some patients.  
• Pair sleep with the basics. Good sleep amplifies the benefits of heart‑healthy eating, activity, and blood pressure, sugar, and cholesterol control.  

The bottom line

Sleep isn’t a luxury—it’s a heart‑health essential. If your nights are short, broken, or punctuated by snoring and gasping, talk with your clinician; fixing sleep can be a powerful, low‑cost step toward protecting your heart.  

Source: “The Correlation Between Sleep and Coronary Heart Disease: A Review,” Rev. Cardiovasc. Med., 2025.  

Editor’s note: This article is for information only and is not a substitute for professional medical advice.