Obstructive sleep apnea (OSA) and pulmonary hypertension (PH) can occur together. OSA causes repeated pauses in breathing during sleep. These pauses can lower oxygen levels and place extra stress on the heart and lungs.
If you have pulmonary hypertension, untreated OSA may make your symptoms harder to manage. Understanding the connection between these conditions can help you seek the right testing and treatment.
In this blog, we’ll explain the link between OSA and pulmonary hypertension, why they may occur together, and what treatment options may help.
Understanding Obstructive Sleep Apnea and Pulmonary Hypertension
Pulmonary hypertension occurs when blood pressure in the blood vessels of the lungs becomes too high. OSA occurs when the upper airway becomes blocked during sleep.
Both conditions can put extra strain on the cardiovascular system. Doctors may use tests such as right heart catheterization to assess pulmonary hypertension.
What Is Pulmonary Hypertension?
Pulmonary hypertension occurs when blood vessels in the lungs become narrowed, blocked, or damaged. This makes it harder for the heart to pump blood through the lungs.
Common symptoms include:
- Shortness of breath
- Fatigue
- Chest pain
- Swelling in the legs
A right heart catheterization may be used to measure pressure in the pulmonary arteries and help diagnose pulmonary hypertension.
What Is Obstructive Sleep Apnea?
Obstructive sleep apnea occurs when the muscles in the back of the throat relax during sleep. This can block the upper airway and cause repeated pauses in breathing.
Common symptoms include:
- Loud snoring
- Gasping for air during sleep
- Excessive daytime sleepiness
- Morning headaches
- Frequent nighttime awakenings
These breathing interruptions can lower oxygen levels and prevent restful sleep.
How OSA Affects the Cardiovascular System
OSA can cause repeated drops in blood oxygen levels during sleep. This puts stress on the heart and blood vessels.
Over time, these changes may contribute to or worsen pulmonary hypertension. When OSA and PH occur together, each condition can place additional strain on the heart and lungs.
The Link Between Obstructive Sleep Apnea and Pulmonary Hypertension
OSA and pulmonary hypertension can occur together, and research has found an association between the two conditions.
Several factors may increase the risk of developing both conditions.
Shared Risk Factors
Some risk factors for OSA and PH include:
- Obesity
- Smoking
- Sedentary lifestyle
- Diabetes
- High blood pressure
- Chronic lung disease
Chronic lung conditions can also affect oxygen levels and may contribute to pulmonary hypertension.
How OSA Can Worsen Pulmonary Hypertension
During an OSA episode, breathing stops or becomes restricted. This can cause oxygen levels to drop.
In response, blood vessels in the lungs may narrow. This can increase pressure in the pulmonary arteries.
Repeated episodes may place additional stress on the heart and lungs and may make pulmonary hypertension harder to manage.
OSA in People With Pulmonary Hypertension
OSA may be common among people with pulmonary hypertension. Because symptoms such as fatigue and shortness of breath can occur with both conditions, OSA may sometimes go undiagnosed.
Testing for OSA can help determine whether sleep-related breathing problems are affecting your health.
How OSA and PH Affect the Body
OSA and PH are connected through changes that occur during repeated breathing interruptions.
Low Oxygen and High Carbon Dioxide
During sleep apnea episodes, oxygen levels can fall while carbon dioxide levels rise. These changes can increase activity in the nervous system and affect heart rate and blood pressure.
Repeated episodes may also contribute to:
- Inflammation
- Blood vessel dysfunction
- Increased resistance in the pulmonary blood vessels
- Changes in the pulmonary arteries
These effects may increase the strain placed on the heart and lungs.
Impact on Cardiovascular Health
Pulmonary hypertension can place significant stress on the heart. In more serious cases, it may contribute to heart failure.
People with OSA and PH may also have a higher risk of cardiovascular problems. This makes proper diagnosis and treatment important.
Treating OSA may help reduce some of the stress caused by repeated breathing interruptions and low oxygen levels during sleep.
Chronic Obstructive Pulmonary Disease and OSA
Chronic obstructive pulmonary disease (COPD) can also occur alongside OSA and pulmonary hypertension.
How COPD Can Affect OSA and PH
COPD is a lung disease that causes airflow limitation and inflammation. People with COPD may also develop OSA.
When COPD and OSA occur together, the risk of pulmonary hypertension may increase. Low oxygen levels, inflammation, and changes in blood vessels can all contribute to this relationship.
People with COPD, OSA, and PH may need a treatment plan that addresses all three conditions.
Diagnosing OSA in People With Pulmonary Hypertension
Proper diagnosis is important when OSA and pulmonary hypertension occur together.
Signs and Symptoms of OSA
Common signs of OSA include:
- Loud snoring
- Excessive daytime sleepiness
- Frequent nighttime awakenings
- Morning headaches
- Gasping or choking during sleep
Some symptoms, such as fatigue and shortness of breath, can also occur with pulmonary hypertension. This can make testing especially important.
Sleep Study (Polysomnography)
A sleep study, also called polysomnography, is one of the main tests used to diagnose OSA.
During the test, doctors can monitor:
- Breathing patterns
- Oxygen levels
- Heart rate
- Sleep patterns
For someone with pulmonary hypertension, a sleep study can help determine whether OSA may be contributing to their symptoms.
Home Sleep Apnea Testing
A home sleep apnea test may be an option for some people who cannot visit a sleep center.
The test can monitor breathing and oxygen levels while you sleep at home. A healthcare provider can determine whether a home test is appropriate for your symptoms and health needs.
Treatment Options for OSA and Pulmonary Hypertension
Treatment depends on the severity of OSA and pulmonary hypertension. Some people may need more than one type of treatment.
Continuous Positive Airway Pressure (CPAP) Therapy
CPAP is a common treatment for OSA.
A CPAP machine delivers a steady flow of air through a mask while you sleep. The air helps keep the airway open and prevents breathing pauses.
Treating OSA with CPAP may help improve oxygen levels and reduce some of the strain that OSA places on the cardiovascular system.
People with pulmonary hypertension should work with their healthcare providers to determine whether CPAP is appropriate for them.
Lifestyle Changes
Lifestyle changes may help manage both OSA and pulmonary hypertension.
Helpful steps may include:
- Maintaining a healthy weight
- Staying physically active when medically appropriate
- Eating a heart-healthy diet
- Avoiding smoking
- Limiting alcohol
- Following your prescribed treatment plan
Some people with OSA may also benefit from sleeping on their side or using a wedge pillow.
Talk with your healthcare provider before starting a new exercise program, especially if you have pulmonary hypertension or another cardiovascular condition.
Medications for Pulmonary Hypertension
People with pulmonary hypertension may need medications to help manage high pressure in the pulmonary blood vessels.
Depending on the type and severity of pulmonary hypertension, treatment may include medications such as:
- Endothelin receptor antagonists
- Phosphodiesterase inhibitors
- Calcium channel blockers
Your healthcare provider can determine which treatment is appropriate for your condition.
When to See a Specialist for OSA and Pulmonary Hypertension
Managing OSA and pulmonary hypertension may require care from more than one healthcare professional.
The Role of a Sleep Specialist
A sleep specialist can evaluate symptoms of OSA and recommend appropriate testing and treatment.
If you have pulmonary hypertension, your sleep specialist may work with your pulmonologist or cardiologist to coordinate your care.
Importance of Regular Monitoring
Regular follow-up appointments can help your healthcare team monitor your condition and treatment.
Your providers may use follow-up visits to:
- Review your symptoms
- Check how well treatment is working
- Adjust treatment when needed
- Monitor changes in your health
Why Early Treatment Matters
Untreated OSA and pulmonary hypertension can place ongoing stress on the heart and lungs.
Early diagnosis and treatment can help manage symptoms and reduce the risk of complications.
If you have symptoms of OSA or pulmonary hypertension, talk with a healthcare provider about testing and treatment.
Research and Future Directions
Researchers continue to study the relationship between OSA and pulmonary hypertension.
Studies have explored whether CPAP can reduce pulmonary artery pressure and improve exercise capacity in people with both conditions.
Researchers are also studying medications used to treat pulmonary hypertension and how they may help people with OSA and other related conditions.
As research continues, doctors may gain a better understanding of how OSA and pulmonary hypertension affect each other and how to treat both conditions.
What Research Shows About COPD, OSA, and PH
Research has also examined the relationship between COPD, OSA, and pulmonary hypertension.
One study discussed in this area included patients with COPD. Some participants also had OSA. Researchers used overnight polysomnography, pulmonary function tests, and medical records to compare the groups.
The findings showed that patients with COPD and OSA had higher pulmonary artery pressure and lower oxygen saturation than patients with COPD alone.
The study also found a relationship between the severity of OSA and the severity of pulmonary hypertension in patients with COPD.
These findings highlight the importance of evaluating sleep apnea in people with COPD and pulmonary hypertension.
Take Action to Manage OSA and Pulmonary Hypertension
Obstructive sleep apnea and pulmonary hypertension can affect both the heart and lungs. When these conditions occur together, proper diagnosis and treatment are important.
Treating OSA may help improve sleep quality, oxygen levels, and overall health. If you have pulmonary hypertension and symptoms of sleep apnea, a sleep evaluation may help identify whether OSA is contributing to your condition.
Talk with a sleep specialist about your symptoms and treatment options.