Can Lack of Sleep Trigger Heart Palpitations or Arrhythmias? Causes, Evidence and Warning Signs

Direct answer

Too little sleep can make some people notice a heartbeat. That feeling is not an arrhythmia diagnosis. Longer studies link shorter sleep with atrial fibrillation. Genetic results differ: one 2023 analysis found no clear cause, and a 2025 British result did not repeat in a second population.

1. How too little sleep can affect the heart

A night without sleep can change the nerves that help set the heartbeat. Some people then notice palpitations or an uneven rhythm.

In one group of healthy adults, a full night awake was followed by extra beats in some people (PMID 23179915). Another study found blood pressure rose, while the resting pulse did not change (PMID 22408018). The first study also tested a medicine in that group. This page does not turn that into advice to start or stop a heart medicine.

2. A palpitation is not the same as a diagnosed arrhythmia

A palpitation means the heartbeat feels unusually clear. It may be fast, heavy, skipped, or fluttering. The NHS lists too little sleep, stress, caffeine, alcohol, and some medicines among common reasons, and says most palpitations are not serious (NHS: Heart palpitations).

An arrhythmia is a diagnosis of the heart’s electrical rhythm. It needs an ECG or a recorder a clinician chooses. The NHLBI notes that some people with an arrhythmia have no clear symptom, and some feel palpitations (NHLBI: symptoms).

3. What studies say about sleep and atrial fibrillation

Longer observational studies find a link. In Suita, among 6,898 people, sleeping no more than 6 hours compared with 7 hours had an adjusted hazard ratio of 1.34, and irregular sleep had 1.63 (PMID 35273660). A pool of six observational studies found a risk ratio of 1.06 (PMID 37183080).

Asking about cause gets different answers

In 2023, a genetic analysis did not find a causal effect of short sleep. The confidence interval covered no difference (PMID 37183080).

In 2025, in UK Biobank, a genetic tendency to insomnia symptoms and to short sleep of 6 hours or less versus 7 to 8 hours each carried a hazard ratio of 1.14. Having both together carried 1.08, without evidence that the two multiplied beyond adding their separate risks. The same tests in HUNT2 did not line up (PMID 39913680).

Insomnia studies also disagree. One pooled analysis found a link (PMID 29460411). HUNT did not find a clear link after adjustment (PMID 38284226). A study of younger veterans found a higher risk that should not be applied to the general public (PMID 37791503).

This page does not say short sleep is not a cause, and it does not say short sleep causes atrial fibrillation in everyone. The evidence still differs by method and by population.

4. Paused breathing in sleep is a separate question

Observational studies found the chance of atrial fibrillation rose with the severity of obstructive sleep apnea. In the group without another clear reason, the odds ratio was 1.71 (PMID 35905270). Saying “I did not sleep enough” does not equal that condition. Loud snoring, breathing pauses seen by someone else, or strong daytime sleepiness should be told to a clinician.

5. Other reasons the heartbeat feels more noticeable

The NHS also lists stress, alcohol, caffeine, nicotine, and some medicines. If a drink or a medicine shows up with the symptom, write it down for the clinician. Do not stop a current heart medicine on your own.

6. How clinicians look for a rhythm problem

An ECG is the common test. If the symptom is absent during the tracing, a resting ECG can miss that episode. A Holter records ordinary activity for a shorter time. A longer recorder is for palpitations or fainting that are uncommon, when a clinician sees a reason. Blood tests for salts and thyroid hormone are chosen, not required for everyone (NHLBI: diagnosis).

7. How much sleep most adults are advised to get

Most adults are advised to sleep about 7 to 9 hours a night, according to the NHLBI and the American Heart Association. Needs differ. Sleeping more than 9 hours is not automatically harmful, especially during recovery or illness.

That range is general health advice. It is not a number of hours that guarantees freedom from an arrhythmia.

Separate the feeling from what the studies can answer

This table separates questions. It does not diagnose one person.

Numbers from sources that were read, and the limit on applying them to everyone

What this page takes from the documents that were read

Prepared by Asst. Prof. Dr. Norawit Raatpiboon. Too little sleep can change the nerves that help set the heartbeat, so some people notice palpitations. Longer studies link shorter sleep with atrial fibrillation. A 2023 genetic analysis did not show a clear cause. A 2025 analysis did in a British cohort and did not repeat in a second population. That is not a verdict for every person.

Common questions

Sources

• Mendelian randomization of sleep traits and atrial fibrillation, 2025. PMID 39913680
• Short sleep duration and atrial fibrillation, observational and genetic analysis, 2023. PMID 37183080
• Suita Study and meta-analysis of sleep duration and atrial fibrillation. PMID 35273660
• Sleep quality and incident atrial fibrillation. PMID 29460411
• Insomnia symptoms and atrial fibrillation in HUNT. PMID 38284226
• Insomnia and early atrial fibrillation in younger veterans. PMID 37791503
• Obstructive sleep apnea and atrial fibrillation, dose-response. PMID 35905270
• Heart rate variability after 24 hours without sleep. PMID 23179915
• Blood pressure after 24 hours without sleep. PMID 22408018
• NHS: Heart palpitations
• NHLBI: How much sleep is enough
• American Heart Association: Sleep

A different question

• A pause, then a thump
• Palpitations with arm pain and a normal ECG at the visit

Medical limits

This page is general information. It does not diagnose a group post, and it does not start or stop a heart medicine. Testing belongs to a clinician. If a palpitation comes with chest pain, trouble breathing, fainting, or a feeling of nearly passing out, go to emergency care now.