Situations · Nighttime & Sleep
Heart Palpitations at Night, During Sleep and When Lying Down
Find out why your heartbeat may feel stronger at bedtime, after poor sleep, or when waking suddenly—and when a heart rhythm test may help.
Written by: Dr. Albana Greca, MD, MMedSc, IDF Fellow, Family Physician
Cardiology reviewer profile: Dr. Benard Shehu, Cardiologist
Medical review of this new draft pending
Quick Answer
A noticeable heartbeat at night does not automatically indicate heart disease. Quiet surroundings, sleep position, stress, stimulants, poor sleep and premature beats may contribute. However, intermittent arrhythmias can also occur overnight. New, recurrent or concerning symptoms deserve assessment.
Key Medical Takeaways
- A noticeable heartbeat is not always an abnormal rhythm.
- Sleep, position and medications can affect symptoms.
- Recording rhythm during symptoms can clarify uncertain cases.
- Chest pain, fainting or severe breathlessness require emergency care.
Explore the Nighttime & Sleep Guides
GUIDE 2.1
Heart Palpitations at Night
Understand nighttime sensations, common triggers and the warning signs that matter.
GUIDE 2.2
Heart Palpitations When Lying Down
Explore why position changes heartbeat awareness and what symptoms need evaluation.
GUIDE 2.3
Lack of Sleep and Heart Palpitations
Learn how sleep deprivation, stress and disrupted rest may influence palpitations.
GUIDE 2.4
Heart Palpitations When Lying on the Left Side
Why heartbeats can feel stronger on the left side, and when to seek assessment.
GUIDE 2.5
Waking Up With a Racing Heart
Common reasons for a racing heart on waking, including sleep disruption and arrhythmias.
When Might Monitoring Be Helpful?
A resting ECG shows your rhythm only during recording. When episodes recur but are not captured, a Holter, longer ECG patch or event recorder may help. A clinician may consider testing for anemia, thyroid disease or sleep apnea according to symptoms and examination.
Read our heart palpitation tests and normal results guide for a broader explanation.
Warning Signs
Seek emergency care for chest pain, fainting, severe shortness of breath or collapse accompanying palpitations. Seek timely assessment for recurrent worsening or exertional symptoms.