It can be unsettling when you feel your heart race or skip beats as you drift off to sleep. Fortunately, in most cases, this sensation is harmless. Having nighttime arrhythmias, sudden jerks, or a feeling of falling in bed can be alarming. Yet, knowing what is happening can help ease your worries. Understanding the causes and spotting the signs helps you react calmly and correctly.
Reasons you might feel like your heart jumps when falling asleep.
Several factors can cause the sensation of your heart skipping a beat as you fall asleep. Knowing these triggers can help you find the root cause and relax.
Hypnic Jerks
A common cause of the sensation that your heart jumps as you fall asleep is a hypnic jerk, also known as a “sleep start.” These are involuntary muscle spasms that occur as your body transitions into sleep. Often, you feel like you’re suddenly falling or might even experience flashes of light.
Though hypnic jerks can be surprising, they usually do not pose a threat to health. In fact, around 70% of people experience them. They might sometimes wake you up or surprise your partner if they’re strong, but they aren’t dangerous.
Causes of Hypnic Jerks
The most common causes of hypnic jerks are:
- Too much caffeine or nicotine
- Vigorous exercise
- Not getting enough sleep
- Stress and anxiety
How to Reduce or Prevent Hypnic Jerks
If hypnic jerks are bothering your sleep, find and fix the causes to reduce how often they happen. Various factors can contribute to these sudden movements as you fall asleep:
Caffeine and nicotine
To avoid disrupting your sleep, it’s best to consume caffeine and nicotine earlier in the day. These substances can wake up the brain. They may also disrupt sleep, even if you take them hours before bed.
Exercise
Regular exercise can improve your sleep. Yet, if you do intense workouts late in the day, it might disrupt your rest. This could lead to hypnic jerks. To avoid this, it’s best to schedule runs or dance classes earlier rather than before bedtime.
Not getting enough sleep.
Poor sleep quality, from insomnia or bad habits, can increase hypnic jerks. It can also hurt your focus and mood. Sticking to a regular sleep schedule helps a lot. If you go to bed and wake up at the same time every day, your sleep quality will improve.
Stress and Anxiety
Stress and anxiety can disrupt sleep, causing hypnic jerks. This can happen with both mild and severe cases. To lessen their impact, try relaxation techniques before bed. Also, avoid electronic devices for at least an hour before sleep.
Heart Palpitations
A common reason your heart feels like it jumps when you fall asleep is heart palpitations. You might feel a sudden fluttering or pounding in your chest.
- Pounding
- Fluttering
- Racing heart
- Heart skips a beat
- Extra beats
- Heart-flip
You often feel these sensations more at night. There’s less noise and fewer distractions when you’re in bed. Lying on your left side can sometimes cause heart palpitations. This happens because the heart is closer to the chest wall on that side.
Nighttime heart palpitations are often harmless. Yet, they may indicate heart problems. To stay safe, think about getting an AED for your home. This way, you’ll be ready for any cardiac emergency.
Are heart palpitations dangerous?
Occasional heart palpitations are usually harmless. But if they happen often, they might signal a heart rhythm problem. If your heart rate goes over 100 beats per minute, see a doctor for advice.
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Causes of Heart Palpitations
Heart palpitations can happen for many reasons. Some are easy to manage, but others need medical help.
Lifestyle-Related Causes
- Foods high in sugar, carbohydrates, fat, or monosodium glutamate (MSG)
- Vigorous exercise
- Too much caffeine
- Nicotine
- Alcohol
- Certain drugs (including diet pills, antibiotics, asthma remedies, cough and cold medicines, cocaine, amphetamines, thyroid hormone, and digoxin)
- Stress
- Fever
- Pregnancy
- Dehydration
To reduce palpitations, it’s important to address the underlying causes. To avoid hypnic jerks, skip caffeine, nicotine, and tough workouts. Also, try to relax and reduce stress before bed. Drink plenty of water and avoid alcohol and high-carb foods at night. This can help you feel better.
Heart palpitations are common during pregnancy. They usually aren’t a cause for worry. If you’ve had palpitations before or they continue after childbirth, get a diagnosis.
Underlying Conditions
Some health issues, like heart problems, can make your heart feel like it’s jumping as you fall asleep. These conditions may include:
- Overactive thyroid gland
- Low blood sugar
- Anemia
- Atrial fibrillation
- Arrhythmia (irregular heart rate)
- Tachycardia (fast heart rate)
- Bradycardia (slow heart rate)
- Heart attack
- Heart failure
- Cardiomyopathy
- Heart valve disease
If you often have heart palpitations or a family history of heart problems, see your doctor. They can test for heart disease or other issues. If your heartbeat is irregular, your doctor might recommend a device. This could be an ICD, WCD, or an AED like the LIFEPAK CR2. These devices can help during emergencies.
Tests that Can Detect an Underlying Condition
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When you visit your doctor, they may suggest a series of tests to assist in determining a diagnosis.
- Your doctor might do a physical exam. This exam checks your heart with a stethoscope. It also measures your blood pressure and checks your pulse.
- A blood test is an easy way to find problems like anemia and thyroid issues. Anemia means you have a low red blood cell count.
- An electrocardiogram (ECG or EKG) checks your heart’s electrical activity. It helps find arrhythmias and shows if you have had a heart attack.
- A Holter monitor uses small electrodes attached to your chest. These electrodes connect to a recorder. It continuously tracks your heart’s rhythm for 24 to 48 hours. This helps find any irregularities.
- An ultrasound helps assess your heart’s structure. This helps the doctor find issues like blockages, holes, inflammation, or other problems.
- An exercise stress test is often done when palpitations come with chest pain. It helps doctors check if blood flow to the heart is blocked during exercise.
How to stop heart palpitations.
To treat heart palpitations well, first find the cause. Then, address it. If your doctor finds a condition, they might suggest medication or a device to help your heart. If no heart problems are found, you can use some easy techniques to manage the palpitations.
Food Diary
Track what you eat and drink for a few days. Also, use a pulse oximeter to check your heart rate during the day. Knowing which foods cause palpitations can help you steer clear of them or cut down on how often they occur.
Relaxation Techniques
Include stress relief techniques like meditation and deep breathing in your nightly routine. Seeking counseling can also be beneficial if you’re facing ongoing stressful situations.
Vagal Maneuvers
Vagal maneuvers can help regulate your heartbeat. They stimulate the vagus nerve that links your brain and abdomen. You should only use these techniques if you don’t have any preexisting heart conditions.
Cold Water
Try splashing cold water on your face or taking a cold shower to help refresh yourself.
Bear Down
Tighten your abs and glutes. Press as if you need to use the bathroom.
Knees Against Chest
Gently press your knees to your chest and hold for a minute. This position can be particularly beneficial for babies and children.
Valsalva Maneuver
Gently pinch your nose with your thumb and index finger, then exhale forcefully.
When to Seek Help
If you have heart palpitations and any of these symptoms, get medical help right away.
- Chest pain or tightness.
- Lightheadedness
- Difficulty breathing
- Confusion
- Dizziness
Frequent heart palpitations or a racing heart at bedtime can signal serious risks. These symptoms could mean a higher risk of heart attack, stroke, or sudden cardiac arrest. If these palpitations last more than a few seconds, see your doctor. They can help find the cause and get you treatment in time.

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Talk to a CPR/AED Expert →FAQs
Why does it feel like I’m dying when I fall asleep?
When you fall asleep, you might feel like you’re dying. This can happen due to severe anxiety or heart palpitations. This can be a result of underlying heart conditions or a response to stress. If these sensations persist, it is important to seek medical advice.
Why does your body jerk when falling asleep?
When you experience a body jerk or sudden muscle spasm as you fall asleep, it’s called a hypnagogic jerk. These happen when you go from being awake to sleeping. They are usually harmless. But if they happen often, you should see a doctor.
What causes palpitations during sleep?
Palpitations during sleep can happen for several reasons. Stress, hormonal changes, medication side effects, and heart issues can all play a role. If these happen often or last a long time, a medical checkup can find the cause.
What are hypnagogic jerks, and how are they related to heart palpitations?
Hypnagogic jerks are sudden, involuntary muscle spasms that occur when falling asleep. It’s common for them to happen, and they’re usually not dangerous. But if you notice heart palpitations, see a doctor to check for serious problems.
Conclusion
In short, heart palpitations or hypnagogic jerks while falling asleep usually aren’t worrisome. Yet, you should watch for any recurring or severe symptoms. These sensations can sometimes say health issues that need medical care. If you feel like you’re dying in your sleep, have a racing heart, or notice other concerning signs, contact a healthcare professional. It’s important to keep your heart health in check. Finding and treating issues early can reduce risks and offer peace of mind.
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