3 Ways Untreated Sleep Apnea Silently Affects Your Heart Health

Do you wake up feeling tired even after a full night of sleep? You might think loud snoring is just an annoying habit, but it could be a sign of obstructive sleep apnea, a condition where your airway repeatedly collapses during the night. 

After a sleep physician diagnoses obstructive sleep apnea (OSA), Brian L Kraft, DDS, at Payson Dental and Orthodontics in Payson, Utah, helps patients explore oral appliance therapy and airway-focused dental solutions. 

When left untreated, this sleep disorder does far more than disrupt your rest; it places repeated strain on your cardiovascular system.

The hidden connection between sleep and your heart

Every time your breathing stops during sleep, your blood oxygen levels drop rapidly. Your brain reacts by triggering a survival response, flooding your body with stress hormones that spike your heart rate and blood pressure. This nightly cycle of oxygen deprivation and sudden stress wears down your cardiovascular system over time. 

Research from the American College of Cardiology (2025) shows that OSA is common among people with certain cardiovascular conditions, with prevalence estimated as high as 40% to 80% in patients with hypertension, heart failure, coronary artery disease, pulmonary hypertension, or atrial fibrillation.

3 ways untreated sleep apnea affects your heart

Untreated sleep apnea silently damages your heart by causing high blood pressure, increasing the risk of heart failure, and raising the likelihood of a stroke. Here is how these three serious cardiovascular issues develop when sleep apnea goes unaddressed.

1. Chronic high blood pressure

Repeated drops in oxygen and sleep disruptions can activate stress responses that contribute to higher blood pressure. This constant nighttime strain eventually carries over into the daytime, which may contribute to high blood pressure or make existing hypertension harder to control.

2. Increased risk of heart failure

According to the American Heart Association (2023), sleep apnea has also been linked with left ventricular diastolic dysfunction, meaning the heart may not relax and fill as efficiently between beats. This can increase the risk of heart failure over time.

3. Higher risk of stroke

The combination of high blood pressure, low oxygen, and inflammation damages your blood vessels over time. Sleep apnea is associated with a higher risk of stroke, partly because it can contribute to high blood pressure, oxygen fluctuations, inflammation, and strain on the blood vessels.

Debunking a common sleep apnea myth

Many people believe that sleep apnea only threatens the health of older adults, but this is a dangerous misconception. Younger adults are also vulnerable to the cardiovascular damage caused by poor sleep.

In fact, a study by UT Southwestern Medical Center (2024) found that young adults under age 40 with probable OSA had higher rates of several cardiovascular risk factors, and those with OSA were three times more likely to have experienced a cardiovascular event than young adults without OSA. The study shows an association, not proof that OSA caused every event.

How we help you protect your heart

Fortunately, treating obstructive sleep apnea can improve breathing during sleep and may help reduce some health risks associated with untreated OSA. For some patients, a custom oral appliance may be an appropriate treatment option. 

We offer comfortable oral appliances that help position the jaw or tongue to reduce airway obstruction during sleep, allowing you to breathe easily and sleep deeply.

Oral appliance therapy isn’t the right choice for every patient, but it’s especially useful for adults with mild-to-moderate OSA, CPAP intolerance, or a preference for an alternative therapy.

You don't have to live with chronic fatigue or put your heart health at risk. Contact our office today to schedule a consultation with Dr. Kraft and start your journey toward better sleep and a healthier heart.