About Central Sleep Apnea

Overview

Central sleep apnea is a sleep disorder characterized by brief pauses in breathing during sleep. Unlike obstructive sleep apnea, which is caused by blocked airways, central sleep apnea occurs when the brain fails to send the proper signals to the respiratory muscles, resulting in a disruption of breathing. These episodes of apnea can occur multiple times throughout the night, impacting sleep quality and potentially leading to other health issues. Central sleep apnea is less common than obstructive sleep apnea and accounts for approximately 20% of all sleep apnea cases. It is important to differentiate between the two types of sleep apnea as they have different underlying causes and may require different treatment approaches.

Causes and Risk Factors

The causes of central sleep apnea (CSA) are related to problems with the brain's control of breathing during sleep.

• High-altitude apnea: This occurs at high altitudes due to changes in oxygen levels, which can trigger alterations in breathing patterns.
• Drug-induced apnea: Certain medications, such as opioid pain medications, can interfere with the nervous system or nerves, causing changes in breathing.

Non-modifiable risk factors are factors that cannot be changed or controlled. As for non-modifiable risk factors for CSA:

• Age: CSA can happen at any age, but it is more common in older adults.
• Underlying health conditions: Conditions that affect the lower brainstem, such as congestive heart failure and stroke, can increase the risk of CSA.

Modifiable risk factors are factors that can be influenced or changed. Modifiable risk factors for CSA include:

• Lifestyle habits: Unhealthy lifestyle choices like smoking and excessive alcohol consumption or substance abuse can contribute to the development of CSA.
• Obesity: Being overweight or obese increases the risk of CSA.

Remember, these are general risk factors and causes. It's important to consult with a healthcare professional for a comprehensive evaluation and personalized advice.

Symptoms

The most common early symptoms of CSA include:

• Short periods during sleep when breathing stops
• Cheyne-Stokes breathing (shallow breathing seen in stroke or heart failure patients)
• Waking up feeling short of breath
• Frequent awakenings throughout the night due to lack of oxygen, leading to insomnia

As CSA progresses or becomes more severe, additional symptoms may occur, such as:

• Feeling very sleepy during the day
• Trouble concentrating or focusing on tasks
• Headaches upon waking up
• Changes in mood
• Memory loss

In cases where CSA is caused by neurological conditions like Parkinson's disease, other symptoms may include:

• Difficulty swallowing
• Changes in speech patterns and voice
• Generalized weakness

It's important to note that snoring is more commonly associated with obstructive sleep apnea rather than central sleep apnea. If you experience any concerning symptoms, it's recommended to consult with a healthcare provider for a proper diagnosis and appropriate management.

Diagnosis

To diagnose CSA, the following examinations, tests, and procedures are commonly performed:

• Physical examination: A doctor will conduct a physical examination to assess symptoms and medical history.
• Sleep study: This overnight test measures oxygen levels, brain activity, breathing pattern, heart rate, and lung function while you sleep in a specialized sleep center.
• Electrocardiogram (ECG): This test observes heart rate and rhythm.
• Lung function testing: It helps rule out other conditions that may contribute to CSA.
• MRI of the spine and brain: This imaging test checks for structural issues that may be causing CSA.

It's important to consult with your healthcare professional for personalized advice regarding examinations, tests, and procedures for diagnosing and determining the severity of CSA.

Treatment Options

The goals of treatment for CSA are to reduce the frequency of respiratory events during sleep and improve symptoms. Here are the recommended treatments and how they work to achieve these goals:

• Medication:
• Medications such as diuretics can stimulate the breathing mechanism, helping to regulate breathing patterns.
• Therapies:
• Non-invasive ventilation machines: These devices deliver different air pressures levels for breathing, reducing the likelihood of sleep apnea, customizing support and preventing episodes.
• Therapeutic Procedures:
• Phrenic nerve stimulation using can restore normal breathing patterns by stimulating the nerve that controls the diaphragm.
• Health Behavior Changes:
  • Managing underlying medical conditions such as congestive heart failure or Parkinson's disease can help control CSA.
  • Discontinuing triggering medications if they are causing breathing disruptions during sleep.

It's important to note that treatment for CSA should be individualized based on the underlying cause, comorbidities, and symptoms. Consult with your healthcare professional to determine the most suitable treatment approach for you.

Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.