Could sleep apnea lead to a higher risk of sudden death? Orthognathic experts explain the dangers and prevention methods behind it!

  • Update date: 2025-07-23
  • Author: Fenghua United Clinic
Does sleep apnea increase the risk of sudden death? Orthognathic experts analyze the dangers and prevention methods behind it!

We often see or hear news reports that some seemingly healthy adults suddenly die in their sleep for unknown reasons, which is shocking and puzzling.

and"sleep apnea" is one of the potential factors leading to sudden death in sleep.

This disease is often mistaken for just "snoring while sleeping", but it can silently cause respiratory arrest,Blood oxygen drops suddenly, ultimately endangering life.

This article will introduce you to the types of sudden death, explain the fatal mechanism of apnea, and how to effectively reduce the risk through orthognathic surgery and lifestyle adjustments. If you or your family members have long-term sleep disorders or extreme daytime fatigue, please pay attention to the information in this article.

Taipei Fenghua Joint Clinic analyzes the crisis behind it and provides professional advice to help you stay away from risks in your sleep.

Comparison of the two major types of sudden death

Two major causes of sudden death

When it comes to "sudden death", most people think ofHeart attackHowever, sudden death is actually divided intoSudden cardiac death and non-cardiac sudden deathUnderstanding these two types will help us clarify the pathogenic mechanism behind them and then master the prevention measures.

  • Sudden Cardiac Death: refers to sudden death caused by arrhythmia, myocardial infarction, heart failure and other problems, which lead to the inability of the heart to effectively pump blood. This is the most common cause of sudden death, accounting for about 80% of all sudden death cases.

  • Non-cardiac sudden death：Including stroke, respiratory failure,epilepsy, or even sleep apnea. This type of sudden death is often overlooked, especially sleep-related breathing disorders, which are more likely to kill people silently.

Clearly distinguish the source of sudden death, is the first step in developing a prevention strategy, and sleep apnea is a high-risk factor in non-cardiac sudden death that cannot be ignored.

Apnea is the "silent trigger" of sudden death

Many people find it hard to imagine that simple snoring can lead to a fatal crisis.

However,The link between apnea and sudden death has been confirmed in many studiesThis disease often occurs during sleep at night. Repeated interruptions in breathing cause hypoxia in the body, which puts the heart and brain in a state of high pressure for a long time, thereby increasing the risk of sudden death.

What is sleep apnea?

Sleep apnea is a common sleep disorder among modern people., mainly divided into the following two types:

  • blocking type: The most common, caused by relaxation of the muscles at the back of the throat, which causes the airway to collapse and leads to breathing interruption.
  • central type: The brain does not send the correct signals to control breathing. This is less common and is usually related to neurological disease or heart failure.

Regardless of the type,Repeated breathing stops can causeDecreased blood oxygenActivation of the sympathetic nerves poses a serious threat to overall health.

How does sleep apnea affect heart and lung function?

Patients with sleep apnea experience dozens to hundreds of breathing interruptions during sleep, each accompanied byTransient hypoxia and blood pressure fluctuationsThis repeated lack of oxygen can lead to:

  • Increased risk of heart rhythm disorders: Studies have shown that the risk of atrial fibrillation in patients with severe respiratory arrest increases by 2 to 4 times.
  • Hypertension and heart failure: Long-term excitement of the sympathetic nerves leads to high blood pressure and increases the burden on the heart.
    Chronic hypoxia damages the brain and other organs: Causes symptoms such as inattention, memory loss, daytime sleepiness, etc.

According to the Journal of the American Heart Association, patients with severe, untreated sleep apnea haveThe sudden death rate is 2 to 3 times higher than normal people.therefore,Apnea is not just snoring, but a chronic disease that threatens life.

"No sound" at night is not necessarily a good thing: respiratory arrest may be quietly threatening your life

Many family members mentioned when describing the patient's condition before his death: "He slept very quietly and without any sound."

But in fact,"Silence" may not be sleep, but respiratory arrest is happening.

The danger of apnea isIt often goes unnoticed.

What are the common symptoms of respiratory arrest?

Common symptoms of respiratory arrest

The following are common but easily ignored symptoms:

  • Snoring is loud and intermittent, accompanied by gasping or choking sounds
  • Lack of energy during the day, poor concentration, sleepiness
  • Dry mouth and sore throat when waking up
  • Poor sleep quality and frequent awakenings at night
  • Headache, mood swings

If you or your partner observes the above symptoms, it is important to seek medical attention as soon as possible..

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Risk factors for sudden death in sleep

If the following physiological changes occur during sleep, the risk of sudden death will be greatly increased:

  • Nocturnal hypoxia(SpO₂ is continuously lower than 90%)
  • Irregular heartbeat：Such as atrial fibrillation, premature ventricular contraction
  • Autonomic imbalance: Abnormal sympathetic nerve activity during sleep

These changesOften closely related to respiratory arrestIf not treated early, it may become a fatal factor during sleep.

Why are most patients not aware of it?

Apnea has the following characteristics that make it easy to be ignored:

  • The patient is unaware of the attack during sleep.
  • Snoring is considered "normal" and not taken seriously
  • Daytime fatigue is often mistaken for work stress orLack of sleep
  • Many symptoms are chronic and not easily linked to respiratory problems

This is one of the reasons why respiratory arrest is called the "silent killer.", reminding the public not to take it lightly.

How does orthognathic surgery improve sleep apnea?

When conservative treatments (eg, CPAP, weight loss, side sleeping) are ineffective,Orthognathic surgery is an effective option for treating moderate to severe obstructive sleep apnea.

This surgery adjusts the position of the upper and lower jaws and improves the airway structure, achieving a fundamental effect of unobstructed breathing.

  • Expand upper airway space: Move the upper and lower jaws forward to expand the airway, soft palate, and space behind the tongue root
  • Reduce airway resistance:Through surgery, airway resistance can be reduced, making breathing smoother and thereby improving the body's oxygen supply. 
  • Improve quality of life and health index: Improved sleep quality after surgery, better spirits during the day, and can improve comorbidities such as hypertension and diabetes

According to many studies, after orthognathic surgery,About 801 patients with TP3T or aboveApnea Hi Index (AHI)Significant declineThis treatment is particularly suitable for severe cases caused by abnormal bone structure.Whether surgery is actually suitable still needs to be determined by a professional doctor after evaluating the jaw structure and sleep examination results..

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Want to prevent sudden death? Start with breathing quality

Rather than worrying about sudden tragedies, it is better to take proactive measures in your daily life.Improving breathing quality is the key starting point to reduce the risk of sudden deathThe following are the specific directions recommended by the physician:

  • Establish a regular work and rest schedule, avoid staying up late and overwork
  • Maintain a healthy weight and reduce airway pressure
  • Quit smoking and avoid excessive alcohol intake
  • Sleeping sideways can reduce airway collapse -> in the future, troublesome airways will be directly changed to "respiratory tracts"
  • Get regular sleep checks and professional assessments

If you have been diagnosed with apnea, it is important to discuss with your doctor the most appropriate treatment.Continuous positive airway pressure (CPAP), oral appliances (anti-snoring braces), orthognathic surgeryEach method has its own indications and limitations.

Don’t ignore the warning signs of snoring and daytime sleepiness, because behind these phenomena may be lurking a chronic but deadly crisis.

If you or your family members have related symptoms, it is recommended that you make an appointment at Fenghua Joint Clinic immediately. The professional team will help you regain healthy sleep and a safe life.

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Snoring treatment success stories

The main visual of a patient with moderate sleep apnea undergoing orthognathic surgery, highlighting the chin and mandibular retrusion.

MMA surgery to treat sleep apnea

This case shares the treatment experience of a patient with moderate sleep apnea (AHI 22.9). The patient had sleep problems due to mandibular and chin retraction, and was unable to adapt to CPAP treatment. Through 3D customized orthognathic surgery, using the treatment method of counterclockwise rotation and forward movement of the upper and lower jaw bones (CCW-MMA), the 6-month follow-up showed that the AHI dropped to 2.7, successfully improving the symptoms of sleep apnea, while improving the Appearance, the patient was quite satisfied with the surgical results.
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A 39-year-old male with underdeveloped upper and lower jawbones underwent bimaxillary orthognathic surgery. Comparison of airway CT scans before and after the surgery.

A 39-year-old man's upper and lower jaw bones were underdeveloped and compressed backwards

Let me share the case of a 39-year-old male patient. Due to insufficient development of the upper and lower jaw bones, they were compressed backwards, resulting in airway stenosis, sleep apnea (AHI 22.5), and daytime sleepiness. The patient's airway space was successfully improved through orthognathic surgery on both jaws, nasal septum correction and lower nose clip plasty surgery. Three months after the operation, the AHI dropped to 5.1, the lowest blood oxygen concentration increased to 93%, and the patient's mental state and quality of life were significantly improved.
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Main visual of orthognathic surgery case of a female patient with sleep apnea

Treatment of bucket apnea in women

Discuss the case of sleep apnea treatment in a female patient with long chin. Unlike other patients with mandibular retrusion, her airway obstruction point was located in the retropalatal space and nasal cavity. It was diagnosed that it was caused by maxillary retrusion and stenosis. Through clockwise rotation of both jaws, orthognathic surgery moves the upper jaw forward and simultaneously reduces the thickness of the inferior turbinate, successfully improving respiratory problems. This case shows that sleep apnea has multiple causes and requires accurate diagnosis and customized treatment plans.
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Deep sleep is full of energy! Orthognathic surgery improves sleep structure and turns heavy nights

Deep sleep orthognathic surgery is full of energy! Breathing is smooth and dreams are sweet

A very sleepy patient came to see a doctor with a sleep report. The report showed that he had severe sleep apnea (AHI = 31.4 /hr). Due to the long-term lack of rapid eye movement (REM) sleep, he also developed clinical symptoms such as bad mood, memory deterioration and cognitive dysfunction. Over the years, he has tried positive pressure respirators and anti-snoring mouthpieces, but in recent years he has found it increasingly difficult to adapt to them. He would remove these breathing aids himself during sleep, which naturally had no therapeutic effect, so he hoped to seek more radical surgical treatment. We performed Maxillo-Mandibular Advancement (MMA) to widen his airway. From the CT scan, we can see the location of the obstruction (the suspensory part and the tongue root), which was well opened and widened. The position of the hyoid bone was obviously lifted upward and forward. The postoperative sleep report showed that the sleep apnea index (AHI) dropped from 31.4/hr to 7.5/hr, the minimum blood oxygen concentration increased from 80% to 89%, and the sleep structure was closer to that of healthy individuals. In principle, the treatment goal should be to reduce light sleep N2 and increase deep sleep N3 and the proportion of rapid eye movement (REM). Light sleep N2 dropped from 72.4% to 55.7% (N2 of a healthy individual should account for 55%), deep sleep N3 increased from 9.4% to 12.1% (N3 of a healthy individual should account for 15%), and most importantly, rapid eye movement (REM) increased from 9.4% to 24.8% (REM of a healthy individual should account for 25%). Because of the increase in deep sleep, the patient felt more well-rested and recharged after the operation, his mood was more positive, and he had more energy in life and work.
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Main visual of a case study of a patient with severe sleep apnea undergoing orthognathic surgery on the upper and lower jaws.

Severe sleep apnea: Decided to undergo MMA orthognathic surgery for the sake of the child

A patient with severe sleep apnea (AHI=69.8) decided to seek treatment because of severe snoring that affected his family's quality of life, especially after the birth of his child, and daytime sleepiness. After trying non-surgical methods such as side sleeping, positive pressure respirators, and anti-snoring braces with limited results, I finally chose to undergo MMA orthognathic surgery. After the operation, the AHI dropped from 69.8 to 13, and the minimum blood oxygen concentration during sleep increased from 53% to 83%. This not only improved the mental and physical strength, but also made the family no longer need to wear earplugs to sleep.
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Comparison of facial contour and airway widening before and after orthognathic surgery in patients with sleep apnea

Thunderous snoring is caused by apnea

A patient with moderate to severe sleep apnea had a minimum blood oxygen concentration of only 44% during sleep. Not only did he suffer from severe snoring, but he also experienced dangerous breathing difficulties at night. Through the 3D customized orthognathic surgery performed by Dr. Jiang Houren of Fenghua United Clinic, the maxillary bone was moved forward by 6mm and the mandibular bone was moved forward by 12mm. This not only improved the problem of respiratory tract stenosis, but also solved the problem of facial distortion. After the operation, the patient's sleep quality has been significantly improved, snoring is no longer a problem, and the airway expansion has brought unprecedented smoothness.
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