What Are Heart Palpitations and Why Do They Happen?
Heart palpitations are the sensation of your heart racing, pounding, fluttering, or skipping beats. They occur when you become unusually aware of your heartbeat, often due to extra beats (premature contractions), rapid heart rhythms, or heightened awareness from anxiety or stimulants. Most palpitations are harmless, but some can signal serious arrhythmias.
Palpitations are one of the most common reasons people visit a cardiologist. They can originate from the upper chambers (atria) or lower chambers (ventricles) of the heart. Premature atrial contractions (PACs) and premature ventricular contractions (PVCs) are the most frequent causes and occur in virtually all adults. These extra beats are typically harmless and do not require treatment unless they become very frequent or symptomatic.
Less commonly, palpitations can indicate sustained arrhythmias such as supraventricular tachycardia (SVT), atrial fibrillation, or ventricular tachycardia. These conditions cause more prolonged rapid or irregular heartbeats and may require medical evaluation and treatment. Understanding the difference between benign and potentially serious palpitations helps you decide when reassurance is sufficient and when to seek medical attention.
What Should You Do When You Feel Heart Palpitations?
Stay calm and sit or lie down. Try vagal maneuvers such as bearing down, splashing cold water on your face, or coughing forcefully. If palpitations are brief and occur in isolation without other symptoms, they are usually benign. Seek emergency care if palpitations last more than a few minutes with chest pain, dizziness, or fainting.
Vagal maneuvers stimulate the vagus nerve, which can slow the heart rate and terminate certain types of supraventricular tachycardia. The Valsalva maneuver — bearing down as if having a bowel movement for 10-15 seconds — is the most studied technique and can terminate SVT in up to 20-25% of cases. The modified Valsalva maneuver, where patients are laid supine with legs elevated immediately after straining, increases success rates to approximately 43% according to the REVERT trial published in The Lancet.
Document your palpitation episodes by noting when they occur, what you were doing, how long they last, and any associated symptoms. This information is invaluable for your doctor when determining whether further evaluation is needed. Many smartwatches and smartphone apps can now record a single-lead ECG during episodes, providing objective data about the heart rhythm that can guide clinical decision-making.
The modified Valsalva maneuver increases SVT termination success rates to approximately 43% according to the REVERT trial
What Causes Heart Palpitations?
The most common causes are premature ventricular contractions (PVCs) and premature atrial contractions (PACs), which occur in virtually all adults. Other causes include supraventricular tachycardia (SVT), atrial fibrillation, anxiety and panic attacks, thyroid disorders, anemia, caffeine, alcohol, and certain medications.
PVCs are extra heartbeats originating from the ventricles. They are extremely common — 24-hour Holter monitoring detects PVCs in up to 75% of healthy adults. Most people experience fewer than 1% PVC burden (percentage of total heartbeats), which is considered benign. However, PVC burdens exceeding 15-20% may lead to PVC-induced cardiomyopathy, a reversible form of heart failure. Catheter ablation of the PVC focus can cure this condition with success rates exceeding 80%.
Supraventricular tachycardia (SVT) refers to rapid heart rhythms originating above the ventricles, including AV nodal reentrant tachycardia (AVNRT), AV reentrant tachycardia (AVRT), and atrial tachycardia. SVT typically presents as sudden-onset rapid regular palpitations at rates of 150-250 bpm that end abruptly. AVNRT is the most common type, predominantly affecting young women. Catheter ablation is highly effective for SVT, with cure rates exceeding 95% and low complication rates.
How Are Heart Palpitations Treated?
Treatment depends on the underlying cause and severity. Benign palpitations from PVCs typically need only reassurance and trigger avoidance. SVT may be treated with vagal maneuvers, medications like adenosine or beta-blockers, or curative catheter ablation. Atrial fibrillation requires anticoagulation and rate or rhythm control.
For benign PVCs, the most important intervention is reassurance. Studies show that simply knowing PVCs are harmless significantly reduces symptom burden and anxiety. When treatment is needed for bothersome PVCs, beta-blockers (metoprolol, atenolol) and calcium channel blockers (diltiazem, verapamil) are first-line medications. For PVCs refractory to medication or with high burden (>15%), catheter ablation offers a curative option with success rates of 80-95% depending on the PVC origin.
For SVT, catheter ablation is often recommended as first-line therapy given its high cure rate (>95%) and low risk profile. Medications including beta-blockers, calcium channel blockers, and flecainide are alternatives for patients who prefer medical management or are not candidates for ablation. Acute SVT episodes can often be terminated with vagal maneuvers or intravenous adenosine in the emergency department.
What Lifestyle Changes Help Reduce Heart Palpitations?
Reduce caffeine and alcohol consumption, stay well-hydrated, manage stress through relaxation techniques, get 7-9 hours of sleep, exercise regularly at moderate intensity, and avoid known triggers. These lifestyle modifications can significantly reduce palpitation frequency in many patients.
Stress management is particularly important since anxiety and stress are among the most common palpitation triggers. Techniques including diaphragmatic breathing, progressive muscle relaxation, mindfulness meditation, and cognitive behavioral therapy have demonstrated effectiveness. Regular aerobic exercise at moderate intensity paradoxically reduces palpitation frequency by improving cardiac autonomic tone and reducing resting sympathetic activation. However, some individuals experience palpitations during intense exercise, and this pattern should be evaluated by a cardiologist.
Adequate hydration is often overlooked but important. Dehydration reduces blood volume, causing the heart to compensate with faster or irregular beats. Electrolyte imbalances, particularly low magnesium and potassium, can also trigger arrhythmias. Ensuring adequate intake of magnesium-rich foods (dark leafy greens, nuts, seeds) and potassium-rich foods (bananas, avocados, sweet potatoes) supports normal cardiac electrical function.
What Are the Complications if Heart Palpitations Are Left Unevaluated?
Most palpitations are benign and carry no risk of complications. However, palpitations that are caused by undiagnosed sustained arrhythmias like atrial fibrillation or ventricular tachycardia can lead to stroke, heart failure, or sudden cardiac death if left untreated. Proper evaluation distinguishes harmless from potentially dangerous causes.
Undiagnosed atrial fibrillation is the most common serious condition that presents with palpitations. Without anticoagulation, AFib increases stroke risk fivefold. Some people with AFib have minimal symptoms and may not seek evaluation for years, during which silent strokes and progressive atrial enlargement can occur. This is why any new or persistent palpitations warrant at least a baseline ECG.
Very frequent PVCs (greater than 15-20% of total heartbeats) can occasionally cause PVC-induced cardiomyopathy, a reversible form of heart failure. Catheter ablation of the PVC focus cures this condition with high success rates. Rarely, palpitations may be the first sign of ventricular tachycardia, a potentially life-threatening arrhythmia, particularly in people with structural heart disease. With appropriate evaluation, most serious causes can be identified and effectively treated.
- Stroke from undiagnosed atrial fibrillation without anticoagulation
- PVC-induced cardiomyopathy from very frequent premature ventricular contractions (greater than 15-20% burden)
- Heart failure from sustained tachycardia (tachycardia-induced cardiomyopathy)
- Syncope (fainting) from ventricular tachycardia or severe bradycardia
- Increased anxiety and reduced quality of life from unexplained persistent symptoms
- [Rare] Sudden cardiac death from undiagnosed ventricular tachycardia in patients with structural heart disease
How Can You Live Well With Heart Palpitations?
For most people, living well with palpitations means understanding their benign nature, identifying and avoiding personal triggers, managing stress and anxiety, staying well-hydrated, and maintaining regular sleep habits. Reassurance from a proper medical evaluation is often the most effective treatment.
Diet and hydration play important roles in managing palpitations. Drink adequate water throughout the day, as even mild dehydration can trigger extra beats. Some people benefit from reducing caffeine, though research shows moderate intake is safe for most. Limit alcohol, as it is a known arrhythmia trigger. Eat regular, balanced meals to maintain stable blood sugar levels, which can influence heart rhythm.
Regular moderate exercise improves autonomic balance and typically reduces palpitation frequency over time. Aim for 150 minutes per week of walking, swimming, or cycling. If you notice palpitations only during exercise, discuss this with your cardiologist, as exercise-induced arrhythmias may warrant specific evaluation.
Stress and anxiety management are often the most impactful interventions. Palpitations create anxiety, and anxiety triggers more palpitations, forming a vicious cycle. Breaking this cycle with cognitive behavioral therapy, mindfulness meditation, regular deep breathing practice, and adequate sleep (7-9 hours nightly) can dramatically reduce symptom burden. If your palpitations have been evaluated and deemed benign, trust that reassurance and focus on overall well-being.
What Questions Should You Ask Your Doctor About Heart Palpitations?
Asking specific questions helps you understand whether your palpitations are benign or require further evaluation, what monitoring options are available, and what treatment strategies are most appropriate for your specific situation.
A focused conversation with your cardiologist can provide reassurance about benign palpitations or identify next steps for concerning findings. Bring your palpitation diary and any smartwatch ECG recordings to your appointment for the most productive discussion.
- Should I wear a Holter monitor or event recorder to capture the rhythm during episodes? — Ambulatory monitoring is the most important diagnostic tool for intermittent palpitations
- Is an echocardiogram needed to rule out structural heart disease? — This imaging test evaluates whether the heart muscle and valves are normal
- Are my PVCs frequent enough to warrant treatment or follow-up? — PVC burden above 10-15% may require periodic echocardiographic surveillance
- Could my palpitations be related to anxiety, and should I consider therapy? — Anxiety is one of the most common palpitation causes and responds well to treatment
- Am I a candidate for catheter ablation if medications are not effective? — Ablation offers cure rates above 95% for SVT and 80-95% for symptomatic PVCs
