Palpitations: When to See a Doctor

What Are Palpitations, Exactly?

Palpitations are an uncomfortable awareness of your own heartbeat. The sensation may feel like fluttering in the chest, a hard thud, a skipped beat, or a racing that comes on without warning. Some people feel it in the throat or neck rather than the chest.

The experience is subjective. The underlying rhythm during palpitations can be completely normal, mildly irregular, or a clinically significant arrhythmia. That variability is exactly why evaluation matters: you cannot reliably distinguish a benign ectopic beat from atrial fibrillation by sensation alone.

What a Palpitation Actually Feels Like

Patients commonly describe three distinct patterns:

• Flip or thud: a single hard beat followed by a brief pause. This usually represents a premature ventricular contraction (PVC) or premature atrial contraction (PAC).
• Racing: sustained fast heart rate, sometimes regular (supraventricular tachycardia, sinus tachycardia) and sometimes irregular (atrial fibrillation).
• Flutter or quiver: a rapid, low-intensity tremor in the chest. Common with atrial flutter or anxiety-driven sinus tachycardia.

How Common Are They?

Palpitations are one of the most frequent cardiovascular complaints in primary care. A population-based cohort study published in the BMJ estimated that palpitations account for approximately 16% of primary care consultations for cardiac symptoms, with a lifetime prevalence close to 50% in the general adult population [1]. Most episodes are self-limited and benign, but the challenge is separating those cases from the minority that carry real risk.

What Causes Palpitations?

The cause falls into one of four broad categories: lifestyle or environmental triggers, non-cardiac medical conditions, primary cardiac arrhythmias, or structural heart disease. Getting the cause right determines the treatment.

Lifestyle and Environmental Triggers

Caffeine is the most frequently identified dietary trigger. A double-blind crossover trial published in the Journal of the American Heart Association (N=103) found that high caffeine intake did not significantly increase arrhythmia burden versus placebo, but self-reported palpitation frequency was higher in the caffeine arm [2]. Alcohol is a stronger arrhythmia trigger: the HOLIDAY Heart Syndrome, described in the literature since 1978, documents a clear association between acute alcohol consumption and atrial fibrillation in otherwise healthy individuals [3].

Other common triggers include:

• Dehydration and electrolyte depletion (low potassium or magnesium)
• Nicotine and stimulant medications (pseudoephedrine, amphetamines)
• High-intensity exercise, especially in untrained individuals
• Poor sleep and high psychological stress

Non-Cardiac Medical Conditions

Several systemic diseases produce palpitations as a secondary symptom.

Thyroid disease is among the most clinically relevant. Hyperthyroidism drives sinus tachycardia and increases the risk of atrial fibrillation by a factor of roughly three compared with euthyroid individuals, per a Danish registry study of 586,460 patients [4]. Hypothyroidism can produce bradycardia with palpitation-like awareness of the slower rhythm. TSH testing should be part of the standard palpitation workup.

Anemia reduces oxygen-carrying capacity, prompting compensatory tachycardia. A hemoglobin below 8 g/dL is frequently symptomatic.

Hormonal shifts in perimenopause and menopause are a frequently underrecognized cause. Estrogen modulates cardiac ion channels, and falling estrogen levels during the menopause transition alter autonomic tone in ways that increase ectopic beats. The Study of Women's Health Across the Nation (SWAN) found that women in late perimenopause reported palpitations at nearly twice the rate of premenopausal women [5]. For women on hormone therapy, some formulations may reduce palpitation frequency by stabilizing autonomic variability, though the evidence is still accumulating.

Anxiety and panic disorder produce real tachycardia through catecholamine release. This does not mean the palpitations are "just anxiety." The arrhythmia can be genuine sinus tachycardia reaching 150 bpm or higher, and panic disorder has a bidirectional relationship with supraventricular tachycardia that should be assessed rather than assumed.

Primary Cardiac Arrhythmias

When palpitations have a cardiac origin, the most common findings on ambulatory monitoring are:

• Premature ventricular contractions (PVCs): benign in structurally normal hearts. Frequent PVCs (more than 10,000 per 24 hours or more than 10% of total beats) may contribute to PVC-induced cardiomyopathy if persistent.
• Supraventricular tachycardia (SVT): episodic, often abrupt-onset racing that may self-terminate. Responds well to vagal maneuvers or adenosine acutely, and to catheter ablation definitively.
• Atrial fibrillation (AF): the most common sustained arrhythmia, affecting an estimated 6.1 million Americans as of the most recent CDC estimates [6]. AF palpitations are characteristically irregular and may be accompanied by reduced exercise tolerance.
• Ventricular tachycardia (VT): less common but high risk. Requires urgent evaluation, particularly in patients with known structural heart disease or prior myocardial infarction.

When Should You Worry? Red Flags That Mean Call 911

Most palpitations do not require an emergency response. These ones do. Call 911 immediately if palpitations occur alongside any of the following:

• Chest pain or pressure lasting more than a few minutes
• Syncope (fainting) or near-syncope (feeling like you are about to faint)
• Severe shortness of breath at rest
• New unilateral weakness, facial drooping, or slurred speech (possible embolic stroke from AF)
• Palpitations in a patient with known structural heart disease, prior cardiac arrest, or a family history of sudden cardiac death

The American Heart Association's 2019 guidelines on the evaluation of syncope state: "Syncope occurring during exertion or in the supine position, or associated with palpitations, should prompt immediate evaluation for a potentially life-threatening arrhythmia" [7].

The Scenarios That Are Urgent But Not 911

Go to urgent care or call your physician the same day if:

• Palpitations last more than 30 minutes without resolving
• You have new-onset palpitations and a known diagnosis of heart failure, hypertrophic cardiomyopathy, or coronary artery disease
• Your resting heart rate during the episode is above 150 bpm and does not come down with rest
• You are pregnant and experiencing new palpitations

The Scenarios That Are Routine

Schedule a non-urgent appointment within one to two weeks if palpitations are:

• Brief, infrequent, and self-terminating
• Clearly linked to caffeine, alcohol, or a recent stressful event
• Not accompanied by any red-flag symptoms
• Recurring but previously evaluated with a normal workup

How Are Palpitations Diagnosed?

Diagnosis follows a stepwise approach: history and physical exam, resting ECG, targeted laboratory work, and ambulatory cardiac monitoring if the ECG is non-diagnostic or if symptoms are recurrent.

History and Physical Exam

The history is the most powerful diagnostic tool in palpitation evaluation. Clinicians assess onset, duration, frequency, associated symptoms, triggers, and termination pattern. Abrupt onset and abrupt termination favor a re-entrant arrhythmia such as SVT. A gradual onset and offset favor sinus tachycardia from anxiety or exertion.

Resting 12-Lead ECG

The resting ECG is the first test ordered. It identifies pre-excitation (Wolff-Parkinson-White pattern), QT prolongation, bundle branch block, or evidence of prior myocardial infarction, all of which change the risk classification immediately. The yield of capturing the symptomatic rhythm on a routine ECG is low (under 5%) because most palpitations are paroxysmal.

Laboratory Testing

Standard labs in the palpitation workup include:

• Complete blood count (to screen for anemia)
• Comprehensive metabolic panel (potassium, magnesium, renal function)
• Thyroid-stimulating hormone (TSH)
• Fasting glucose or hemoglobin A1c if diabetes is suspected

In selected patients, urine or serum catecholamines screen for pheochromocytoma, a rare but treatable cause.

Ambulatory Cardiac Monitoring

This is where most diagnoses are made. Options include:

• 24-to-48-hour Holter monitor: captures every beat over the monitoring period. Diagnostic yield for a causative arrhythmia is approximately 35% in patients referred for palpitations, per a systematic review in Annals of Internal Medicine [8].
• Extended Holter (7 to 14 days) or patch monitor: increases yield to over 60% for patients with weekly symptoms.
• Implantable loop recorder (ILR): appropriate for rare, severe, or unexplained syncope-associated palpitations. Records continuously for up to three years.
• Event monitor or smartphone-based ECG: suitable for patients with infrequent but predictable episodes who can activate recording during symptoms.

Echocardiogram

An echocardiogram is not universal in the palpitation workup, but it is ordered when the clinical history, ECG, or arrhythmia type raises concern for structural heart disease. Hypertrophic cardiomyopathy, dilated cardiomyopathy, and valvular disease are structural causes that increase the risk of malignant arrhythmia.

How Are Palpitations Treated?

Treatment depends entirely on the underlying cause. There is no single palpitation medication.

Lifestyle Modification

For benign palpitations triggered by lifestyle factors, targeted changes produce meaningful reduction. Cutting caffeine to below 200 mg per day, limiting alcohol to no more than one standard drink per day, and maintaining adequate hydration (2 to 2.5 liters per day for most adults) addresses the majority of benign cases. Magnesium repletion (310 to 420 mg daily from dietary or supplemental sources) may reduce ectopic beat frequency in magnesium-deficient patients, though large randomized controlled trial data are limited.

Pharmacologic Treatment

When lifestyle changes are insufficient or when a specific arrhythmia is identified, pharmacotherapy follows:

• Beta-blockers (metoprolol succinate, atenolol): first-line for symptomatic PVCs, SVT prevention, and rate control in atrial fibrillation. Metoprolol succinate at 25 to 100 mg daily is a standard starting dose.
• Calcium channel blockers (verapamil, diltiazem): alternative rate control in AF or SVT when beta-blockers are not tolerated.
• Flecainide or propafenone (class IC antiarrhythmics): used for AF or SVT in structurally normal hearts. Contraindicated after myocardial infarction or with reduced ejection fraction.
• Antithyroid medications (methimazole) or thyroid hormone replacement (levothyroxine): treats thyroid-driven palpitations at the root cause.

For women in perimenopause, addressing the hormonal driver may reduce palpitation frequency. A 2023 review in Menopause journal (the official journal of the Menopause Society) noted that menopausal hormone therapy may reduce autonomic dysregulation that underlies palpitations in this population, though randomized data specifically targeting palpitation frequency as a primary endpoint are still needed [9].

Catheter Ablation

Catheter ablation is the definitive treatment for SVT and for symptomatic, drug-refractory atrial fibrillation. The 2023 ACC/AHA/ACPE/HRS guideline update for the diagnosis and management of atrial fibrillation gives ablation a Class I recommendation (Level of Evidence A) for patients with paroxysmal AF who have failed or are intolerant to antiarrhythmic drug therapy [10]. Success rates for SVT ablation exceed 95% in experienced centers.

For frequent, symptomatic PVCs in structurally normal hearts, ablation is effective when the PVC morphology is consistent and the focus is accessible. Freedom from PVCs at one year post-ablation ranges from 75% to 90% in published series.

Implantable Cardioverter-Defibrillator (ICD)

An ICD is reserved for patients with sustained ventricular tachycardia, prior cardiac arrest, or high-risk structural heart disease (ejection fraction below 35% despite optimal medical therapy). It is not a treatment for typical palpitations in low-risk patients.

Palpitations and Hormones: A Closer Look

The intersection of hormonal health and cardiac rhythm is relevant to a large share of patients seeking care on telehealth platforms.

Perimenopause and Menopause

Estrogen and progesterone influence autonomic tone and cardiac ion channel expression. As both decline during perimenopause, sympathetic activity rises relative to parasympathetic activity. This shift lowers the threshold for ectopic beats and sinus tachycardia. SWAN data showed palpitation prevalence rising from roughly 5% in premenopause to nearly 10% in late perimenopause [5].

Women in this transition benefit from a workup that includes TSH (thyroid disease peaks in this demographic), a 24-hour Holter if symptoms are frequent, and a conversation about whether hormonal optimization is appropriate for their overall symptom burden.

Thyroid Disease

Thyroid disease deserves a dedicated note because it is both common and highly treatable. Overt hyperthyroidism produces a persistent sinus tachycardia at rest (typically 90 to 120 bpm), fine tremor, heat intolerance, and weight loss alongside palpitations. Even subclinical hyperthyroidism (suppressed TSH with normal free T4) increases AF risk by approximately 2.8-fold, per a meta-analysis of 10 prospective cohort studies published in the Archives of Internal Medicine [11]. TSH testing costs under $30 and should not be skipped.

GLP-1 Receptor Agonists and Heart Rate

Patients using semaglutide (Ozempic, Wegovy) or tirzepatide (Mounjaro, Zepbound) sometimes report palpitations, particularly early in treatment. GLP-1 receptor agonists modestly increase resting heart rate by 2 to 4 bpm on average, a class effect documented in the SUSTAIN and STEP trial programs. In the SUSTAIN-6 trial (N=3,297), semaglutide increased mean heart rate by 2.2 bpm versus placebo [12]. This effect is generally benign but can amplify awareness of heartbeat in patients who are already prone to palpitations. Persistent, symptomatic tachycardia on a GLP-1 agent warrants a clinical review rather than automatic discontinuation.

The HealthRX Decision Framework for Palpitations

Use this stepwise approach to guide your next action:

Step 1. Screen for red flags. Chest pain, syncope, or severe dyspnea? Call 911.

Step 2. Assess duration and frequency. Episodes lasting more than 30 minutes, or more than two per week, need same-day or next-day evaluation.

Step 3. Review your medication and supplement list. Stimulants, decongestants, high-dose thyroid medication, and even some herbal supplements (ephedra, bitter orange) can drive palpitations. Bring a complete list to your appointment.

Step 4. Order baseline tests. A resting ECG and TSH are the minimum starting point. Add CBC and metabolic panel if dehydration, anemia, or electrolyte imbalance is plausible.

Step 5. Match monitoring to symptom frequency. Daily symptoms need a 24-to-48-hour Holter. Weekly symptoms need a 7-to-14-day patch. Monthly or less frequent symptoms may need a 30-day event monitor or implantable loop recorder.

Step 6. Treat the identified cause, not the symptom. Benign PVCs in an anxious patient may respond better to addressing the anxiety than to a beta-blocker.