People With Obstructive Sleep Apnea Face 71% Higher Risk of Heart Attacks, Stroke, or Death: Major New Study

New research set to be presented at the European Congress on Obesity (ECO 2026) in Istanbul has revealed a sobering connection between sleep health and longevity. According to a massive analysis of electronic health records involving 2.9 million people, adults diagnosed with obstructive sleep apnea (OSA) face a 71% higher risk of experiencing major cardiovascular events—such as heart attacks or strokes—or dying from any cause compared to those without the condition.

The study, which tracks outcomes over approximately four years, identifies OSA as a potent, independent cardiovascular risk factor. Critically, this elevated risk persisted even after researchers statistically adjusted for common contributing factors, including obesity, smoking, and type 2 diabetes. The findings suggest that the repeated physical strain of apnea itself plays a decisive role in damaging the heart and vascular system.

The Scale of the Study: Beyond “Just Snoring”

The research was a collaborative effort between Imperial College Health Partners, Imperial College Healthcare NHS Trust, and Eli Lilly and Company. To reach their conclusions, investigators analyzed data from 20,300 adults with a formal OSA diagnosis and compared them against a control group of 97,412 adults without the condition, matched for age and health profiles.

The results were stark:

• 26.3% of individuals with OSA suffered a cardiovascular event or died during the follow-up period.

• 17.5% of the control group experienced similar outcomes.

“This study underscores that obstructive sleep apnea is not just a ‘snoring problem’ but a serious chronic condition that increases the risk of heart disease and premature death,” said Dr. Heather Fitzke, co-author and senior researcher at Imperial College Health Partners. “Even when obesity is accounted for, the risk remains elevated, which should prompt clinicians to treat OSA as a key part of cardiovascular risk management.”

Why Apnea Strains the Heart

Obstructive sleep apnea occurs when the soft tissues in the throat relax excessively during sleep, causing the upper airway to collapse. This leads to frequent pauses in breathing, often lasting ten seconds or longer, which continue until the brain “wakes” the body just enough to resume breathing.

These episodes—which can occur dozens of times per hour—wreak havoc on the cardiovascular system through several mechanisms:

1. Oxygen Deprivation (Hypoxia): Each pause in breathing causes blood oxygen levels to plummet, starving the heart and brain.

2. Sympathetic Surge: To restart breathing, the body releases “fight or flight” hormones like adrenaline, causing sudden spikes in heart rate and blood pressure.

3. Vascular Stress: Over time, this nightly “rollercoaster” damages the lining of the blood vessels (endothelial dysfunction) and accelerates atherosclerosis, the buildup of plaque in the arteries.

A 2021 scientific statement from the American Heart Association (AHA) echoed these concerns, noting that moderate-to-severe OSA is linked to significantly higher rates of hypertension, atrial fibrillation, and heart failure.

The “Vicious Cycle” of Obesity and OSA

While the study found that OSA is an independent risk factor, researchers emphasized the dangerous synergy between apnea and weight. Approximately 40% to 70% of people with OSA also live with obesity. Excess weight, particularly around the neck, increases soft-tissue bulk that contributes to airway collapse.

“Obesity worsens OSA, and OSA worsens obesity-related metabolic and cardiovascular risk,” explains Dr. Arunima Biswas, a cardiologist and sleep-disorders specialist not involved in the study. “This creates a vicious cycle: weight gain narrows the airway, more severe apnea impairs sleep quality, and poor sleep further disrupts the hormones that regulate appetite, promoting even more weight gain.”

Public Health Implications: The Need for Screening

Despite affecting an estimated 10% to 20% of the adult population, OSA remains vastly underdiagnosed. Many patients dismiss their symptoms—such as loud snoring or daytime fatigue—as a normal part of aging or a busy lifestyle.

Medical experts are now calling for OSA screening to be treated with the same urgency as cholesterol or blood pressure checks.

“For primary-care physicians, this means that whenever we see someone with resistant hypertension, recurrent atrial fibrillation, or a stroke, we should strongly consider sleep apnea,” says Dr. Rajesh Rana, a pulmonologist and sleep medicine specialist. “Screening can be as simple as a validated questionnaire, which can dramatically change long-term outcomes if a diagnosis is confirmed.”

Treatment Landscapes: CPAP and Beyond

The gold standard for treating OSA remains Continuous Positive Airway Pressure (CPAP). This therapy involves wearing a mask that delivers a steady stream of air to keep the airway open. Consistent use has been shown to reduce blood pressure and lower the risk of stroke.

However, patient adherence is a notorious hurdle. Many find the masks uncomfortable or noisy. This has led to a rise in alternative treatments:

• Oral Appliances: Custom-fitted mouthguards that shift the jaw forward.

• Hypoglossal Nerve Stimulation: An implanted device that stimulates the tongue to keep the airway clear.

• Anti-Obesity Medications: Newer drugs like GLP-1/GIP receptor agonists (e.g., tirzepatide) are currently being studied for their ability to reduce apnea severity by facilitating significant weight loss.

Study Limitations

While the findings are significant, experts urge a balanced interpretation. As an observational study based on electronic health records, it cannot definitively prove that OSA causes heart attacks.

Additionally, because the data came from real-world records, the severity of apnea (mild vs. severe) was not uniformly categorized for all 20,300 patients. This makes it difficult to determine if the 71% risk increase applies equally to those with mild snoring versus those with severe breathing pauses.

Practical Takeaways for Readers

If you or a loved one experiences the following symptoms, it is vital to consult a healthcare provider:

• Loud, chronic snoring.

• Witnessed gasping or choking sounds during sleep.

• Excessive daytime sleepiness, even after a full night’s rest.

• Morning headaches or a dry throat.

Managing OSA is not just about getting a better night’s sleep—it is a critical intervention for long-term heart health.

Medical Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult with qualified healthcare professionals before making any health-related decisions or changes to your treatment plan. The information presented here is based on current research and expert opinions, which may evolve as new evidence emerges.

References

• NDTV Health. “People With Obstructive Sleep Apnea Have 71% Higher Risk Of Heart Attacks, Stroke And Death: Study.” April 2, 2026.