Understanding Sleep Apnea: A Gasp For Sleep

Understanding Sleep Apnea: Symptoms, Diagnosis, Treatment, and Long-Term Health Risks

Author: Tommy Douglas

Last updated: June 8, 2026

Editorial note: This article is for education only and should not replace medical advice, diagnosis, or treatment from a licensed healthcare professional.

Waking up tired after what should have been a full night’s sleep can be more than just a frustrating inconvenience. Persistent snoring, gasping, choking during sleep, morning headaches, and daytime fatigue may point to sleep apnea—a common but serious disorder in which breathing repeatedly stops and restarts during sleep.

Man sleeping with a CPAP mask used to treat obstructive sleep apnea.

CPAP therapy helps keep the airway open during sleep and remains one of the most common and effective treatments for obstructive sleep apnea.

Sleep apnea can disrupt sleep quality, strain the heart and blood vessels, affect concentration and memory, and raise the risk of other health problems when left untreated. The good news is that effective treatments are available, and diagnosis often begins with recognizing the warning signs.

Quick Answer: What Is Sleep Apnea?

Sleep apnea is a sleep-related breathing disorder in which breathing repeatedly stops and starts during sleep. These interruptions can lower oxygen levels, fragment sleep, and increase health risks over time. The two main types are obstructive sleep apnea (OSA), caused by a blocked airway, and central sleep apnea (CSA), caused by a problem with the brain’s control of breathing.

The Silent Thief: How Sleep Apnea Disrupts Rest

Sleep apnea may happen dozens of times each night, sometimes without the person being fully aware of it. The body briefly wakes just enough to restart breathing, then drifts back to sleep. That repeated cycle prevents deep, restorative sleep and can leave a person feeling exhausted, foggy, and irritable during the day.

Many people first hear about the problem from a partner who notices loud snoring, pauses in breathing, or gasping for air. Others seek help because of morning headaches, excessive sleepiness, attention problems, or a feeling that they never truly feel rested.

What Are the Main Types of Sleep Apnea?

1. Obstructive Sleep Apnea (OSA)

OSA is the most common form of sleep apnea. It happens when the muscles in the throat relax during sleep and allow the airway to narrow or collapse. Airflow drops or stops, oxygen levels can fall, and the brain briefly interrupts sleep so breathing can resume.

Common symptoms include loud snoring, gasping, choking, dry mouth on waking, daytime sleepiness, trouble concentrating, and irritability. OSA is more likely in people who are overweight, older, have a narrow airway, use alcohol or sedatives, smoke, or have nasal congestion.

2. Central Sleep Apnea (CSA)

Central sleep apnea is different because the airway is not necessarily blocked. Instead, the brain fails to send the proper signals to the muscles that control breathing. CSA is less common than OSA and may be linked to conditions such as heart failure, stroke, high altitude, or other medical problems affecting breathing control.

3. Treatment-Emergent or Complex Sleep Apnea

Some people have a mixed pattern that includes both obstructive and central features. This is sometimes called treatment-emergent central sleep apnea or complex sleep apnea. Because the breathing pattern can be more complicated, diagnosis and treatment planning should be individualized by a sleep specialist.

Common Symptoms of Sleep Apnea

Loud snoring
Witnessed pauses in breathing during sleep
Gasping or choking during the night
Morning headaches
Dry mouth on waking
Excessive daytime sleepiness
Trouble focusing, memory problems, or irritability
Insomnia or frequent awakenings

When to See a Doctor

You should talk with a healthcare professional if you or someone close to you notices loud snoring, breathing pauses, or gasping for air during sleep or if you are consistently tired during the day despite spending enough time in bed. Daytime sleepiness can also increase the risk of driving or work-related accidents.

How Sleep Apnea Is Diagnosed

Diagnosis usually begins with a symptom review, sleep history, and sometimes input from a bed partner. A healthcare professional may recommend an overnight sleep study (polysomnography), which can measure breathing pattern, blood oxygen, heart activity, and sleep stages. In some cases, a simplified home sleep test may be used.

If obstructive sleep apnea is suspected, evaluation may also include looking for a blockage in the nose or throat. If central sleep apnea is suspected, a clinician may look for contributing conditions involving the heart or nervous system.

Why Untreated Sleep Apnea Matters

Sleep apnea does more than disturb sleep. Repeated drops in oxygen and repeated overnight arousals can stress the cardiovascular system, increase inflammation, and interfere with normal blood pressure regulation. Untreated sleep apnea has been linked with high blood pressure, coronary artery disease, stroke, heart failure, and worse cardiovascular outcomes.

Diagram showing how sleep apnea can affect the heart.

Repeated nighttime breathing interruptions can place extra strain on the heart and blood vessels over time.

Sleep Apnea and Heart Health

Researchers and heart-health organizations have described a strong connection between sleep apnea and cardiovascular disease. Obstructive sleep apnea has been associated with higher rates of hypertension, stroke, coronary artery disease, and heart failure. It is also commonly found in people with atrial fibrillation (Afib).

How does sleep apnea contribute to high blood pressure?

During apnea events, oxygen levels fall and the body activates stress responses that can increase heart rate and blood pressure. Repeated episodes night after night may contribute to persistent hypertension and reduced cardiovascular resilience over time.

Sleep apnea and atrial fibrillation

Sleep apnea and atrial fibrillation often occur together. Repeated oxygen drops, pressure changes inside the chest, and sleep fragmentation may increase strain on the heart and contribute to rhythm instability. Because of this, sleep apnea screening is often considered in people with resistant high blood pressure, recurrent atrial fibrillation, or certain other cardiovascular problems.

Sleep Apnea and Memory Problems

Sleep apnea may also affect the brain. Poor sleep quality, repeated oxygen drops, and disrupted sleep architecture can interfere with attention, memory consolidation, and daytime thinking. Many people with untreated sleep apnea report “brain fog,” slower thinking, forgetfulness, or trouble focusing.

More recent reviews continue to examine the link between obstructive sleep apnea and cognitive impairment. While research is ongoing, evidence suggests that untreated OSA may be associated with worse cognitive performance, and some studies report that CPAP treatment may improve areas such as verbal memory, visuospatial function, and working memory.

Treatment Options for Sleep Apnea

1. Positive Airway Pressure (PAP/CPAP)

Continuous positive airway pressure (CPAP) remains one of the most common treatments for obstructive sleep apnea. The device sends pressurized air through a mask to keep the airway open during sleep. Other PAP options, such as bilevel PAP (BPAP) or auto-adjusting PAP (APAP), may be used in selected situations.

Helps prevent repeated airway collapse
Can reduce snoring and improve daytime alertness
Often works best when paired with healthy lifestyle changes

2. Lifestyle Changes

Healthy lifestyle changes can be a meaningful part of treatment. Depending on the person, these may include weight management, regular physical activity, good sleep habits, limiting alcohol, quitting smoking, and avoiding sleeping on the back if position worsens symptoms.

3. Oral Appliance Therapy

Oral devices can be an alternative for some adults, especially if they cannot tolerate CPAP or prefer another option. These devices are usually custom-fitted and help keep the airway open by repositioning the jaw or tongue. Guidance from sleep medicine and dental sleep medicine groups supports oral appliances for adults with obstructive sleep apnea who are intolerant of CPAP therapy or prefer alternate treatment.

4. Hypoglossal Nerve Stimulation

For selected patients with obstructive sleep apnea who cannot tolerate CPAP, an implanted hypoglossal nerve stimulation device may be an option. This therapy stimulates nerves that move the tongue forward so the airway stays open during sleep. It is not appropriate for everyone, but it has become an important alternative for certain patients.

5. Weight-Loss Medication for Selected Patients

In late 2024, the U.S. FDA approved tirzepatide (Zepbound) as the first medication indicated for moderate to severe obstructive sleep apnea in adults with obesity, to be used with a reduced-calorie diet and increased physical activity. This is a newer option and is intended for a specific group of patients rather than for every person with sleep apnea.

6. Surgery and Other Treatments

If other approaches are not effective or not tolerated, some patients may be evaluated for surgery or other airway-opening strategies. The right option depends on the type of apnea, its severity, body anatomy, underlying conditions, and whether obstructive or central events are driving the problem.

Could You Have Sleep Apnea?

You should consider asking a clinician about sleep apnea if you have:

Loud snoring or snorting during sleep
Witnessed pauses in breathing
Morning headaches
Daytime sleepiness or fatigue
Trouble concentrating, memory issues, or irritability
High blood pressure, atrial fibrillation, or other cardiovascular concerns along with sleep symptoms

Key Takeaway

Sleep apnea is common, often underdiagnosed, and very treatable. Left untreated, it may affect sleep quality, heart health, blood pressure, and cognitive function. If you have symptoms, getting evaluated can be the first step toward better sleep, more energy, and reduced long-term health risk.

FAQ

What are the warning signs of sleep apnea?

Common warning signs include loud snoring, gasping or choking during sleep, witnessed pauses in breathing, morning headaches, dry mouth on waking, daytime sleepiness, and trouble concentrating.

Can sleep apnea affect the heart?

Yes. Sleep apnea has been associated with higher rates of high blood pressure, coronary artery disease, stroke, heart failure, and atrial fibrillation.

How is sleep apnea diagnosed?

It is often diagnosed through a sleep study called polysomnography, although some people may be evaluated with a home sleep test.

Is CPAP the only treatment?

No. CPAP is common and effective, but some people may also benefit from lifestyle changes, oral appliances, positional therapy, selected surgery, hypoglossal nerve stimulation, or other treatments depending on the cause and severity of their apnea.

Is there now a medication for obstructive sleep apnea?

For selected adults with obesity and moderate to severe obstructive sleep apnea, yes. Tirzepatide (Zepbound) received FDA approval in December 2024 for that specific use when combined with diet and physical activity.

Sources: