Sleep Apnea - Symptoms, Causes & Treatment

Sleep apnea affects 40 million Americans and is one of the most underdiagnosed conditions in medicine. It is far more than loud snoring. Left untreated, it increases the risk of heart attack, stroke, hypertension, diabetes, and cognitive decline.

DEFINTION

What is Sleep Apnea?

Sleep apnea is a condition where breathing repeatedly stops and starts during sleep due to airway obstruction or a failure of the brain to signal the breathing muscles. These interruptions, called apneas, can occur dozens to hundreds of times per night, preventing deep restorative sleep and triggering a cascade of cardiovascular, metabolic, and cognitive consequences.[1]

Sleep apnea involves almost one billion individuals worldwide, including 40 million Americans, making it one of the most prevalent and consequential conditions in medicine.[2] Despite this, it remains significantly underdiagnosed, partly because many people are unaware they stop breathing during sleep and partly because the symptoms, especially in women and younger adults, often look nothing like the classic picture of a snoring, overweight male.

At Rebis Health, we do not treat sleep apnea as a single condition with a single solution. We treat it as a complex problem with multiple contributing factors, each of which requires evaluation before the right treatment plan can be built.

40M Americans affected by sleep apnea[2]
40-80% of patients with cardiovascular disease also have sleep apnea[3]
34% of middle-aged men meet diagnostic criteria for OSA[3]

THREE TYPES

Three Types of Sleep Apnea

Not all sleep apnea is the same. The type determines the cause and the most effective treatment approach.

Most common

Obstructive Sleep Apnea

Occurs when the throat muscles collapse and physically block the airway during sleep, creating the characteristic loud snoring followed by silent breathing pauses. The airway is the problem, not the brain's signal. OSA is the most common form and the primary focus of most sleep apnea treatment.

Less common

Central Sleep Apnea

Occurs when the brain fails to send proper signals to the breathing muscles. Breathing stops not from obstruction but from a failure of respiratory drive. Less common than OSA and often associated with heart failure, opioid use, or high altitude. Standard CPAP alone is often insufficient.

Complex

Mixed Sleep Apnea

Involves both obstructive and central components. Can develop when treating obstructive sleep apnea uncovers an underlying central component, or can present de novo. Requires specialized treatment strategies that address both the structural airway and the central respiratory control issue.

SIGNS TO WATCH

Sleep Apnea Symptoms

Sleep apnea symptoms appear both during the night and throughout the day. Many people recognize the nighttime signs only when a partner describes them. The daytime symptoms are often misattributed to stress, aging, or other causes.

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Nighttime Symptoms

Loud or frequent snoring
Witnessed pauses in breathing by a partner
Waking with gasping, choking, or shortness of breath
Restless or fragmented sleep
Frequent nighttime urination (nocturia)
Dry mouth or sore throat upon waking
Night sweats
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Daytime Symptoms

Excessive daytime sleepiness despite adequate time in bed
Morning headaches
Difficulty concentrating or brain fog
Irritability, mood changes, or depression
Reduced libido or sexual dysfunction
Falling asleep in passive situations such as reading, meetings, or driving
Waking unrefreshed despite a full night of sleep

ROOT CAUSES

What Cause Sleep Apnea?

Sleep apnea is rarely caused by a single factor. Most cases involve a combination of anatomical, physiological, and lifestyle contributors that together reduce the airway's ability to stay open during sleep.

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Airway Anatomy

  • Narrow jaw or palate reducing the space available for the airway
  • Recessed lower jaw (retrognathia) pushing the tongue backward
  • Enlarged tonsils or adenoids obstructing the throat
  • Large tongue or low tongue position narrowing the airway
  • High arched palate reducing nasal airway space above
  • Deviated nasal septum or nasal polyps restricting nasal breathing
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Body Weight and Composition

Excess weight, particularly around the neck and throat, increases the soft tissue mass surrounding the airway and reduces its ability to stay open during sleep. A neck circumference above 17 inches in men and 16 inches in women is associated with significantly elevated OSA risk. Weight loss alone can produce meaningful improvement in AHI, though it rarely eliminates sleep apnea entirely in patients with significant anatomical contributors.

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Muscle Tone and Neuromuscular Factors

  • Reduced upper airway muscle tone during sleep allows the airway to collapse
  • Alcohol and sedatives significantly relax pharyngeal muscles, worsening apnea
  • Age-related loss of muscle tone increases OSA risk, particularly in men over 40
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Hormonal and Metabolic Factors

  • Hypothyroidism causes soft tissue swelling that can narrow the airway
  • Perimenopause and menopause reduce upper airway muscle tone, sharply increasing OSA risk in women after age 50
  • Metabolic syndrome and insulin resistance are both risk factors and downstream consequences of OSA
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Sleep Position

  • Sleeping on the back allows gravity to pull the tongue and soft palate backward
  • Positional OSA is a distinct subtype where AHI doubles or more in the supine position
  • Positional therapy is an underutilized first-line treatment for positional OSA

WHY IT MATTERS

How Sleep Apnea Affects Whole-Body Health

Each apnea event triggers a stress response: oxygen drops, carbon dioxide rises, the heart rate spikes, blood pressure surges, and the body briefly awakens to restore breathing. Repeated hundreds of times each night, this cascade creates cumulative damage across every body system.

Cardiovascular Disease

Moderate to severe sleep apnea significantly increases the risk of coronary artery disease, congestive heart failure, stroke, and cardiac arrhythmias.[2] OSA prevalence is 40 to 80 percent among patients with hypertension, heart failure, and atrial fibrillation, and treating OSA reduces cardiovascular events and mortality.[3]

Metabolic and Hormonal Effects

Chronic sleep disruption and intermittent hypoxia impair insulin sensitivity, disrupt cortisol rhythms, and contribute to metabolic syndrome, weight gain, and type 2 diabetes. Sleep apnea and metabolic dysfunction are bidirectionally linked, each worsening the other.

Cognitive Function and Mental Health

Chronic sleep fragmentation impairs memory consolidation, executive function, processing speed, and emotional regulation. Untreated sleep apnea is associated with significantly elevated rates of depression, anxiety, and cognitive decline, including increased dementia risk over time.

Safety and Daily Function

Excessive daytime sleepiness from sleep apnea substantially increases the risk of motor vehicle accidents and workplace injuries. Patients with untreated severe OSA have crash rates comparable to legally drunk drivers, making treatment not just a health issue but a safety imperative.

COLORADO-SPECIFIC

Sleep Apnea and Altitude in Colorado

Colorado's altitude creates unique sleep apnea challenges

At altitude, lower ambient oxygen levels reduce respiratory drive and can worsen or unmask sleep-disordered breathing. Patients who move to Colorado or travel to the mountains may notice significant symptom changes even if their sleep apnea was previously well-controlled.

At elevation, the lower partial pressure of oxygen can trigger periodic breathing patterns that destabilize sleep and contribute to central sleep apnea, particularly during the first weeks at altitude before acclimatization. For patients along the Front Range and especially in mountain communities like Frisco, altitude-aware evaluation and treatment adjustments are often necessary.

Rebis Health's team has specific experience managing sleep apnea in Colorado's altitude environment, including CPAP pressure adjustments for altitude, identification of altitude-induced central components, and coordinating care for patients whose symptoms change with elevation.

DIAGNOSIS

How Sleep Apnea is Diagnosis

Sleep apnea is diagnosed through a sleep study measuring breathing patterns, oxygen levels, and sleep architecture to calculate the apnea-hypopnea index (AHI). AHI of 5 to 14 is mild, 15 to 30 is moderate, and above 30 is severe.

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Home Sleep Apnea Test (HSAT)

A wearable device worn during a normal night of sleep at home, measuring breathing patterns, oxygen levels, and heart rate. Available via direct ship or local pickup with return materials included. Appropriate for adults where uncomplicated obstructive sleep apnea is the primary concern and where the pre-test probability is high.

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In-Lab Polysomnography

A comprehensive overnight sleep study measuring brain activity, oxygen levels, breathing effort, leg movements, body position, and all sleep stages. Recommended for complex presentations, suspected central or mixed sleep apnea, significant comorbidities, or when home testing is inconclusive. Multi-Sleep Latency Testing (MSLT) is also available for evaluation of narcolepsy and hypersomnia.

COMPREHENSIVE CARE

Sleep Apnea Treatment at Rebis Health

At Rebis Health, we do not default to CPAP as the only answer. We build individualized treatment plans based on the type and severity of sleep apnea, the patient's anatomy, health history, and preferences, and what other contributing factors are driving the condition.

1

Comprehensive Evaluation

Every patient receives a thorough review of sleep history, symptoms, medical comorbidities, medications, and lifestyle factors. Clinical examination of the airway anatomy, including jaw structure, tongue, tonsils, and palate, identifies structural contributors that will guide treatment selection.

2

CPAP Therapy

Continuous positive airway pressure (CPAP) is the gold standard for moderate to severe OSA. Rebis Health's CPAP clinic provides comprehensive education, equipment fitting, and ongoing support using Dr. David McCarty's evidence-based Five Reasons to Treat framework. We address adherence challenges, mask fit, pressure optimization, and travel accommodation, because a CPAP that stays in the drawer treats nothing.

3

Oral Appliance Therapy

Custom-fitted mandibular advancement devices reposition the lower jaw forward during sleep, opening the airway without a machine or mask. Effective for mild to moderate OSA and for patients who cannot tolerate CPAP. Our airway-focused dental team fits and monitors oral appliances alongside sleep medicine evaluation to ensure efficacy.

4

Airway and Structural Interventions

For patients with anatomical contributors to sleep apnea, structural interventions can reduce airway obstruction directly. Options include MARPE palatal expansion for a narrow upper jaw, myofunctional therapy to retrain airway muscle function, tongue tie release, and positional therapy for positional OSA. These are often used alongside CPAP or oral appliance therapy to reduce dependency on device therapy over time.

5

Integrative and Functional Medicine

Our functional medicine team evaluates the metabolic, hormonal, and inflammatory factors contributing to sleep apnea, including thyroid function, sex hormones, body composition, gut health, and nutrient status. Addressing these root-cause contributors alongside airway treatment produces better outcomes than either approach in isolation.

6

Altitude Adjustment and Monitoring

For Colorado patients, altitude-specific adjustments to CPAP pressure settings and monitoring for altitude-induced central apnea are part of our standard care. Patients traveling to or from altitude receive specific guidance on managing their sleep apnea across elevations.

Frequently Asked Questions:

Adult Sleep Apnea

  • Common signs include loud snoring, witnessed breathing pauses, excessive daytime sleepiness, morning headaches, and concentration difficulty. Formal sleep study needed for diagnosis.

  • Not necessarily. Some patients transition to oral appliances or see improvements with weight loss or surgery.

  • Many initially struggling patients succeed with proper education and support. Alternatives include oral appliances or surgical options.

  • Weight loss significantly helps and may eliminate sleep apnea in some cases, but anatomical factors often require comprehensive evaluation.

  • Yes, significantly increases risk of heart attack, stroke, diabetes complications, and accidents from excessive sleepiness.

  • Highly accurate for diagnosing obstructive sleep apnea in high-probability patients. Lab studies better for complex cases.

  • Yes, often related to enlarged tonsils/adenoids or developmental issues. Early treatment important for proper growth.

  • Higher altitudes worsen sleep apnea by reducing oxygen and potentially triggering central apnea events.

  • Many patients see improvements in blood pressure, diabetes control, mood, and energy levels.

  • Our multidisciplinary team addresses sleep apnea from medical, dental, and integrative approaches, treating all contributing factors for comprehensive, lasting improvements.

Sources

  1. MedlinePlus. Sleep Apnea. National Library of Medicine. medlineplus.gov
  2. Henning R et al. Sleep apnea is a common and dangerous cardiovascular risk factor. PubMed 2024. pubmed.ncbi.nlm.nih.gov
  3. American Heart Association. Obstructive Sleep Apnea and Cardiovascular Disease: A Scientific Statement. Circulation. ahajournals.org
  4. American Academy of Sleep Medicine. Sleep Apnea. Sleep Education. sleepeducation.org