Heart palpitations: the beat is usually fine; the attention is the problem.

Extra beats happen in almost every heart. Whether you feel them, and how much they frighten you, is decided somewhere else.

This page is about understanding the condition and the role the brain and nervous system can play in it. It is not a diagnosis. Your own clinicians know your case.

What heart palpitations are

Palpitations are an awareness of your own heartbeat as abnormal: a skip, a thud, a flutter, a pause followed by a hard beat. Most are caused by premature beats, extra contractions that start outside the heart's normal pacemaker circuit, in the atria or ventricles. Almost everyone has them. Most people never notice. The ones who do often describe the pause and the forceful beat that follows, which is the heart resetting after the early one.

Isolated extra beats are usually not a cause for concern, and they are well known to increase with anxiety, caffeine, alcohol, poor sleep, fever and stimulant medication. But palpitations can also be the symptom of a true arrhythmia, such as atrial fibrillation or a supraventricular tachycardia, or of thyroid disease or anaemia. That is why prolonged episodes, palpitations with fainting, chest pain or breathlessness, or palpitations in someone with known heart disease need proper evaluation, usually with an ECG, blood tests and a wearable monitor.

The puzzle most people with palpitations end up in is this: the monitor comes back showing a normal rhythm, or a few harmless extra beats, and the frightening sensation carries on regardless.

The neuroplastic contribution

Neuroplastic symptoms are real symptoms produced by learned pathways in the brain and nervous system rather than by ongoing disease in the body. The heart is a good example of how this works. Your brain is constantly receiving signals from the heart and deciding which to bring to awareness. When the brain has flagged the heart as a source of danger, it turns the volume up: ordinary beats are felt, extra beats are felt intensely, and each one triggers a jolt of adrenaline that makes the next one more likely. The sensation is genuine. It is not imaginary and not 'all in your head'. And because the volume setting is learned, it can be turned down.

The ATNS Index of Neuroplastic Symptoms is measured about palpitations. It notes that isolated extra beats are common and usually benign, that they can be associated with anxiety, and that prolonged episodes should be diagnostically evaluated. Its position is that when palpitations are frequent enough to concern you, evaluation for neuroplastic symptoms can sometimes be helpful, along with the medical evaluation for other causes. Both tracks, at the same time.

The loop that keeps neuroplastic palpitations going:

• A beat is felt, and the brain reads it as a threat.
• Adrenaline rises, which increases the chance of another premature beat and makes the heart pound harder.
• Attention locks onto the chest, so more beats are noticed.
• Checking the pulse, searching symptoms and avoiding exercise confirm to the brain that the heart is unsafe.

This is the same fear-avoidance cycle seen in chronic pain, transferred to the heart. Our guide to central sensitization explains the amplification. Related pages: PACs and PVCs, ectopic heartbeats and racing heart.

What the research shows

The gap between what the heart does and what people feel is one of the best-documented findings in this area. A 2025 study of patients with frequent premature ventricular contractions, published in a cardiology journal, found that a direct relationship between the palpitations people reported and the extra beats the monitor recorded could be established in only a minority of patients, and reviewed earlier work showing only a weak link between palpitations and recorded cardiac irregularities on ambulatory monitoring.

A 2025 cross-sectional study of people undergoing 24-hour Holter monitoring asked whether self-perception of cardiac symptoms relates to psychological profile. Anxiety was significantly associated with self-reported cardiac symptoms, but not with whether arrhythmias were actually present on the recording. In other words, anxious patients felt more palpitations without having more arrhythmia. The authors still recommended thorough cardiac assessment for anxious patients, which is the right balance.

A review of the diagnostic value of Holter monitoring in palpitations describes a cohort of patients referred for monitoring who could be sorted into three groups: those with panic disorder, whose symptoms came from sympathetic nervous system arousal; those who had begun to suspect heart disease after a life event and were somatizing; and those with clinically significant arrhythmias. Roughly 90 percent of people with panic disorder experience palpitations, and in a small share, real psychiatric and cardiac problems coexist. That is why the ATNS index says to evaluate both: the brain's contribution is common, and it does not rule out the heart's.

Signs the brain may be part of the picture

• Your ECG, blood tests and monitor are normal or show only occasional benign extra beats.
• You feel palpitations most at rest, in bed, or in quiet moments when attention turns inward.
• Episodes are worse with stress, worry, caffeine or poor sleep, and absent when absorbed in something.
• You have cut back on exercise or activity out of fear, and the palpitations have not improved.

A solution that addresses it

Pain and symptom reprocessing is an approach built to lower the nervous system's alarm. For palpitations it means education about neuroplastic symptoms, somatic tracking (noticing a beat with curiosity rather than dread), reducing fear and the sense of threat, a graded return to exercise and the situations you have been avoiding, emotional awareness and expression, and acceptance and commitment skills. Trained clinicians deliver it, and digital programs now make it more accessible. It sits alongside cardiology care and any treatment your doctor recommends.

Cindra is a daily AI companion built around these approaches, with daily check-ins, short practices and plain-language lessons for people whose symptoms have a neuroplastic component. If your palpitations have outlasted a clean heart monitor, you can join the waitlist.

What to do next

1. Get the heart evaluated. See a clinician for an ECG, blood tests including thyroid, and a wearable monitor if episodes are frequent. Palpitations with fainting, chest pain, breathlessness, a sustained very fast rate, or in someone with known heart disease or a family history of sudden death need urgent care.
2. Reduce the obvious triggers. Caffeine, alcohol, stimulants and sleep loss all raise extra beats. Do not stop a prescribed medication without asking the prescriber.
3. If the heart is clear, ask the question. 'Could my nervous system be amplifying this?' The ATNS index says evaluating for neuroplastic symptoms can help when palpitations are frequent enough to worry you.
4. Retrain the response. Stop pulse-checking, return gradually to exercise with your clinician's blessing, and practise the exercise below. Our somatic and mindfulness exercises can help too.

This article is for general education and is not medical advice, and it does not diagnose or treat any condition. Persistent symptoms deserve a proper medical assessment to rule out disease or injury before a neuroplastic explanation is considered. If your symptoms are new, changing, or come with red-flag signs such as fever, unexplained weight loss, numbness or weakness, chest pain, or loss of bladder or bowel control, see a clinician promptly.