Sleep Apnea and Heart Problems: A Comprehensive Overview

Sleep Apnea and Heart Problems: A Comprehensive Overview

Quick takeaways

• Sleep apnea may put extra strain on your heart over time. Repeated breathing interruptions can lower oxygen levels and raise blood pressure, which may increase long-term heart risk.
• Several serious heart conditions are linked to untreated sleep apnea, including high blood pressure, irregular heartbeat disorders, heart disease, heart attack, and stroke.
• Continuous positive airway pressure (CPAP) and other sleep apnea therapies may help reduce certain cardiovascular risks.

Could an untreated sleep condition be affecting your heart health while you sleep?

Sleep apnea can affect breathing throughout the night, which may trigger stress responses that can harm the heart over time. Research has shown that individuals with obstructive sleep apnea (OSA) face a higher risk of cardiovascular disease.¹

Because untreated sleep apnea may increase risks of high blood pressure, heart disease and other conditions, being aware of these connections can help you better advocate for your health and talk to providers about your treatment options.²

Understanding sleep apnea and its cardiovascular impact

To understand potential links between sleep apnea and heart health, it’s important to understand the different types of sleep apnea and how they can affect your body and heart.

Types of sleep apnea

Three main types of sleep apnea are:

• Obstructive sleep apnea (OSA). A condition where the muscles around the throat relax to the point of collapse, restricting airflow during sleep. Breathing may become shallow or stop for seconds to minutes³ at a time.
• Central sleep apnea (CSA). This type of sleep apnea occurs when the brain doesn’t send signals to the muscles that control breathing,⁴ causing breathing to pause during sleep.
• Mixed/complex sleep apnea. A combination of both obstructive and central sleep apnea.

OSA, the most common form of sleep apnea, is becoming increasingly widespread in the U.S. By 2050, around 46% of adults aged 30 to 69 are expected to have OSA.⁵ The rise is especially sharp among women — their rates of OSA are expected to jump by 65%, outpacing the increase seen in men.⁵

Sleep apnea and heart health: is there a link?

Obstructive sleep apnea (OSA) can lead to interrupted breathing. These breathing disruptions may impact heart function by:

• Lowering oxygen. If you experience interruptions in breathing of 30 seconds or more, your blood oxygen level can drop significantly.⁵ Healthy oxygen levels play an important role in heart health.⁶
• Interrupting sleep cycles. Frequent awakenings during the night can stress your body, raising heart rate and blood pressure. Ongoing sleep disruption may increase the risk of heart issues.⁷
• Increasing inflammation. Sleep apnea may raise stress hormones and inflammation,⁸ which can affect blood vessels over time and increase the risk of high blood pressure or heart disease.⁹
• Raising carbon dioxide levels. Interrupted breathing may lead to a buildup of carbon dioxide, placing added strain on the heart.

In some cases, sleep apnea symptoms can feel similar to heart-related symptoms, including chest pain or heart palpitations.¹¹

At the same time, nighttime chest pain may also be caused by conditions like acid reflux. Overlapping symptoms exist between sleep apnea, gastroesophageal reflux disease (GERD), and heart disease, making proper evaluation important.⁵

Never ignore chest pain — always talk to a doctor to determine the cause and appropriate treatment.

Heart conditions associated with sleep apnea

Researchers have found that untreated sleep apnea may increase the risk of heart-related conditions, such as:

• High blood pressure: Disordered breathing during sleep may raise nighttime blood pressure and contribute to ongoing high blood pressure.¹
• Heart rhythm problems: People with sleep apnea are 2 to 4 times more likely to have atrial fibrillation (AFib).¹⁰
• Heart failure: Sleep apnea is commonly found in people with heart failure.¹¹
• Stroke and vascular disease: Sleep apnea may significantly increase the risk of stroke, even without other common risk factors.²

Because these conditions can overlap, it’s important to talk to your doctor if you have sleep apnea and notice new symptoms related to heart health.

How sleep apnea is diagnosed in people with heart disease

Doctors typically use a combination of health history, screening tools and sleep studies to check for sleep apnea in people living with heart disease.

First steps: screenings and risk checks

Screening tools help doctors determine risk before ordering sleep studies. If you have conditions like high blood pressure or heart failure, you may be at higher risk of sleep apnea.¹

Signs of sleep apnea may include:

• Excessive daytime sleepiness
• Morning headaches
• Irritability or mood changes
• Difficulty concentrating
• Frequent snoring or gasping during sleep
• High blood pressure that’s hard to control
• Heart palpitations or irregular heartbeat

Sleep apnea can go undiagnosed in people with heart problems because symptoms may overlap.¹³

Sleep tests your doctor may recommend

Sleep tests are prescribed by a doctor and help diagnose sleep apnea. Common options include:

• Home sleep test: A device used at home to monitor breathing and sleep patterns.
• In-lab sleep study: A detailed overnight test conducted in a sleep lab that tracks brain activity, breathing, oxygen levels and heart rhythms.

Your doctor will determine which test is best based on your health history and needs.¹⁴

What doctors look for in test results

Doctors review sleep data, including the apnea-hypopnea index (AHI), which measures how often breathing pauses occur during sleep. An AHI above 5 is considered abnormal.¹²

They also evaluate oxygen levels, sleep stages and how often you wake during the night.

Heart health checks alongside sleep tests

Doctors may also order heart-related tests, including:

• Echocardiograms
• Ambulatory blood pressure monitoring¹⁶
• Heart rhythm monitoring
• Advanced imaging like MRI or CT scans

Treatment options and heart health benefits

Treating sleep apnea may improve sleep quality and support heart health.

CPAP and other airway therapies

CPAP (continuous positive airway pressure) delivers pressurized air through a mask to keep airways open during sleep.

For people with sleep apnea, CPAP therapy is associated with a 55% lower risk of death from heart-related issues.¹⁸

Other options, such as bilevel PAP or ASV, may be recommended for more complex cases.

Special considerations for people with heart failure

If you have a heart condition, talk to your doctor before starting treatment. They may:

• Start treatment gradually and monitor your response
• Coordinate care between specialists

Other sleep apnea treatments

Alternative treatments may include:

• Oral appliances
• Positional therapy
• Implanted devices like hypoglossal nerve stimulation²¹

Lifestyle changes

Around 30% of people with OSA also have obesity.²² Weight loss may help reduce symptoms for some individuals.²³

Healthy habits may include:

• Regular exercise
• Heart-healthy eating
• Reducing alcohol and quitting smoking

Medications and sleep apnea

Some medications for heart conditions or sleep issues may affect each other. Always talk to your doctor before making changes.¹⁹

Why team-based care matters

Managing sleep apnea and heart health may involve multiple providers, including:

• Primary care doctors
• Cardiologists
• Sleep specialists

Working together helps ensure coordinated care and better outcomes.²⁰

Looking ahead

New technologies and research may improve how sleep apnea and heart conditions are detected and treated.

• Wearable devices may help identify risks earlier¹²
• AI tools may support faster diagnosis
• Emerging therapies may improve comfort and effectiveness

Take our online sleep assessment to gain a better understanding of your sleep quality.

References:

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