Colin Snow
Sleep and sleep disorders play a role in cardiovascular disease (CVD). Waking up with a racing heart can be distressing, but it is not always a sign of something serious. There are many factors that can cause a person to wake up with a racing heart, including stress, sleep deprivation, sleep apnea, and changes in blood sugar levels. Sleep apnea, for instance, increases the risk of irregular heart rate due to lowered oxygen levels and increased stress on the heart. Nightmares and night terrors can also cause people to wake up with a racing heart.
| Characteristics | Values |
|---|---|
| Medical term | Tachycardia |
| Possible causes | Nightmares, night terrors, sleep deprivation, sleep apnea, caffeine, stress, anxiety, changes in blood sugar levels, hormone changes during the menstrual cycle and menopause, fever, heart disease, high cholesterol, high blood pressure, diabetes |
| Symptoms | Fast heart rate, pounding in the chest, shakiness, anxiety |
| Treatment | CPAP therapy, dental splints, reducing caffeine intake |
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What You'll Learn
Sleep apnea
There are many reasons why someone might wake up with a racing heart, and it can be a distressing experience. Often, it is not a sign of something serious, and it may be caused by stress, anxiety, a lack of sleep, or heart arrhythmia. Other common causes include nightmares, night terrors, caffeine, and drastic changes in body temperature. However, one potential cause is sleep apnea, a sleep disorder characterized by repeated stops and starts in breathing during sleep. Obstructive sleep apnea, caused by the throat muscles relaxing and narrowing the airway, is the most common type.
Research has shown that sleep apnea increases the risk of irregular heart rates and hospitalized atrial fibrillation. This is because the sudden drops in blood oxygen levels associated with sleep apnea can raise blood pressure and strain the cardiovascular system. Over time, this can contribute to the development of heart rhythm problems and other cardiovascular issues. Sleep apnea has also been associated with an increased risk of type 2 diabetes, as suggested by a 2019 prospective cohort study and meta-analysis.
The condition can be effectively managed through various treatments, including the use of continuous positive airway pressure (CPAP) machines, oral appliances, or, in some cases, surgery. Lifestyle changes, such as weight loss, sleeping on one's side, or reducing alcohol consumption, can also help improve sleep apnea symptoms. Seeking professional advice and undergoing a sleep study can help individuals determine the most appropriate treatment plan for their specific situation.
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Nightmares and night terrors
Night terrors, on the other hand, are a type of sleep disorder in which a person awakens partially in a state of terror. They are like nightmares, except that nightmares usually occur during rapid eye movement (REM) sleep and are most common in the early morning. Night terrors usually happen in the first half of the night, during non-REM sleep, and are more common in preadolescent boys and children between the ages of 3 and 8. They are generally triggered by fever, lack of sleep, or periods of emotional tension, stress, or conflict. They are characterised by signs of extreme stress, like screaming or waving your limbs, and you probably won't remember them.
Both nightmares and night terrors can cause you to wake up with a racing heart. If you wake up after an upsetting dream or night terror with your heart racing, your heart rate should slow as you calm down. However, if you are concerned about the frequency of your nightmares or night terrors, or if they are affecting your sleep and everyday life, you may consider seeking professional help.
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Stress and anxiety
Sleep is essential for our physical and mental health. However, sometimes we may experience sleep disturbances, such as waking up with a racing heart, which can be distressing and impact our overall well-being. While this can happen to anyone from time to time, if it occurs frequently, it may be a sign of an underlying issue, with stress and anxiety being common culprits.
For example, someone with anxiety may find themselves in a vicious cycle where they worry about not being able to fall asleep, which then triggers their anxiety and makes it even harder to drift off. Over time, this can lead to chronic insomnia, leaving the person feeling exhausted during the day and even more anxious about their ability to sleep the next night. Breaking this cycle can be challenging and may require professional help.
Furthermore, stress and anxiety can also be factors in sleep-related disorders such as sleep apnea. Sleep apnea is a condition where breathing repeatedly stops and starts during sleep due to a relaxation of throat muscles, resulting in narrowed or closed airways. Research suggests that stress and anxiety can increase the risk of sleep apnea, and this disorder is indeed more prevalent in people with mental health issues. Therefore, addressing stress and anxiety through relaxation techniques, therapy, or medication can be an essential part of managing sleep apnea.
If you suspect that stress or anxiety is impacting your sleep, it is important to seek help. This may involve speaking to a healthcare professional, such as your GP, who can advise you on the best course of action. They may recommend lifestyle changes, refer you to a therapist, or discuss medication options to help manage your stress and anxiety, thereby improving your sleep quality.
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Hormone changes
Moreover, stress and anxiety can also trigger the release of hormones that increase the heart rate. Research suggests that around 31% of heart palpitation cases may be due to mental factors such as stress, anxiety, or internal conflict. Nightmares, night terrors, and sleep disorders can also cause you to wake up with a racing heart. Night terrors are a type of sleep disorder in which a person awakens partially in a state of terror, often with a racing heart. Sleep apnea, a common sleep disorder, can also cause a racing heart when waking up. It occurs when the throat muscles relax, causing the airway to narrow or close, leading to repeated breathing stoppages during sleep. Obstructive sleep apnea (OSA) is a type of sleep apnea that can increase the risk of coronary heart disease and strokes.
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Caffeine consumption
A racing heart and insomnia can be caused by a variety of factors, including stress, sleep deprivation, sleep apnea, and changes in blood sugar levels. Caffeine consumption is also linked to insomnia symptoms. A 2016 study published in the journal Nutrition found that daily caffeine use was associated with insomnia symptoms, with underlying anxiety and differences in race/ethnicity possibly playing a role. The stimulating effects of caffeine can last for many hours after consumption, which can negatively affect sleep.
Caffeine is a natural stimulant commonly found in coffee, tea, and cacao plants. It stimulates the brain and central nervous system, increasing alertness. While some people rely on it to stay awake, too much caffeine can increase heart rate and blood pressure and cause anxiety and nervousness. Consuming large amounts of caffeine can lead to a racing heart, especially in those who are more sensitive to its effects.
In a cross-sectional study of 4,558 Australians, it was found that the prevalence of insomnia, palpitations, tremors, and headaches increased significantly with higher caffeine intake. The study also found that the association between these symptoms and caffeine consumption remained significant after controlling for potential confounding factors such as age, alcohol intake, and occupation. These findings suggest that caffeine consumption can indeed contribute to sleep disturbances and a racing heart.
To improve sleep quality and alleviate insomnia symptoms, experts often recommend reducing or eliminating caffeine consumption. While caffeine may provide a temporary energy boost, excessive intake can disrupt sleep patterns and contribute to insomnia and other issues. It is important to be mindful of caffeine intake, especially for those sensitive to its effects, and to prioritize getting enough sleep to maintain overall health and well-being.
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Frequently asked questions
There are many reasons why someone might wake up with a racing heart, including:
- Stress and anxiety
- Sleep deprivation
- Sleep apnea
- Changes in blood sugar levels
- Hormone changes during the menstrual cycle and menopause
- Nightmares and night terrors
- Caffeine consumption
- Iron deficiency anemia
- Heart disease
If you are concerned about your heart racing when you wake up, it is recommended that you seek medical advice to rule out any serious issues.
Sleep apnea is a sleep disorder in which breathing repeatedly stops and starts while you are asleep. Obstructive sleep apnea (OSA) occurs when the tissue in the back of the throat blocks the airway, preventing oxygen from getting to the lungs. Central sleep apnea (CSA) occurs when the brain fails to tell the lungs to breathe.
Sleep apnea has been linked to higher rates of coronary heart disease and strokes. It can also increase the risk of new-onset atrial fibrillation and irregular heart rate. This is because sudden drops in blood oxygen levels can raise blood pressure and strain the cardiovascular system.
Yes, heart disease can affect your ability to sleep. People with congestive heart failure (CHF) often experience shortness of breath that is made worse when lying down, making it difficult to fall asleep or stay asleep.
Yes, your sleeping position may also affect whether you experience heart palpitations. People who sleep on their backs or sides may be more likely to feel palpitations due to pressure changes in the body.
