Witnessed Breathing Pauses During Sleep

Sleep apnea breathing pauses occur when the muscles of the throat relax during sleep, allowing the tongue, soft palate, and other tissues to collapse into the airway and block airflow completely. After each pause, the brain detects dropping oxygen and rising carbon dioxide levels, triggering a partial awakening (micro-arousal) that reopens the airway — often with a gasp, snort, or choking sound.

If you or your partner have observed breathing pauses during sleep, a sleep study can confirm whether sleep apnea is present and determine its severity.

Breathing pauses in sleep apnea are caused by airway collapse. During sleep, the muscles that keep the airway open naturally relax. In people with obstructive sleep apnea, the airway narrows excessively and then collapses completely, blocking airflow.

Factors that contribute to airway collapse include:

• Excess tissue around the neck or throat
• Anatomically narrow airway or large tonsils/adenoids
• A recessed jaw or large tongue
• Muscle relaxation from deep sleep or alcohol
• Sleeping on the back (supine position)
• Nasal congestion or structural nasal issues

Each pause follows a predictable cycle: airway collapse → breathing stops → oxygen drops → brain triggers a micro-arousal → airway reopens → breathing resumes with a gasp or snort → sleep resumes → cycle repeats.

Breathing pauses during sleep become concerning when they:

• Last 10 seconds or longer
• Occur 5 or more times per hour
• Are accompanied by gasping, choking, or snorting sounds
• Occur alongside loud snoring
• Are associated with daytime fatigue, morning headaches, or mood changes
• Are observed by a bed partner who expresses concern

If any of these apply, a sleep study is recommended to measure the frequency and severity of breathing pauses.

Witnessed breathing pauses are a hallmark symptom of obstructive sleep apnea. The condition is defined by the apnea-hypopnea index (AHI) — the number of breathing pauses (apneas) and shallow breathing episodes (hypopneas) per hour of sleep:

Each breathing pause causes oxygen levels to drop, stressing the cardiovascular system. Over time, untreated sleep apnea increases the risk of high blood pressure, heart disease, stroke, and other serious health conditions.

While breathing pauses during sleep are most commonly associated with obstructive sleep apnea, other possible causes include:

• Central sleep apnea — the brain fails to signal the breathing muscles (less common than obstructive)
• Complex sleep apnea — a combination of obstructive and central sleep apnea
• Medication effects — certain medications can depress breathing during sleep
• High-altitude periodic breathing — a normal response to altitude that resolves at lower elevations
• Cheyne-Stokes respiration — associated with heart failure or neurological conditions

A sleep study can distinguish between these causes and guide appropriate treatment.

If a bed partner has observed breathing pauses during your sleep, you should seek evaluation from:

• A physician — to order and interpret a sleep study and assess overall health risks
• A dental sleep medicine provider — if sleep apnea is diagnosed and you prefer an oral appliance to CPAP, or if you cannot tolerate CPAP

Start with our sleep apnea assessment to evaluate your symptoms, then learn about sleep testing options and treatment alternatives including oral appliance therapy.