How can I tell if an irregular heartbeat I feel is benign or requires a doctor’s visit?

If the sensation is brief, occurs only with activity, and you have no dizziness, chest pain, or fainting, it’s often benign. Seek evaluation if episodes last >30 seconds, happen at rest, or are accompanied by light‑headedness, shortness of breath, or chest discomfort.

My heart suddenly races while I’m sitting still—what should I do right now?

Sit or lie down, try a Valsalva maneuver (hold a breath and bear down gently), and monitor the rate. If the heart rate stays >120 bpm for more than a few minutes, you feel chest pain, dizziness, or faint, call emergency services.

What lifestyle changes have the strongest evidence for preventing atrial fibrillation episodes?

Maintain a healthy weight, limit alcohol (no more than 1‑2 drinks per day), quit smoking, manage blood pressure, treat sleep apnea, and engage in regular moderate‑intensity aerobic exercise (e.g., brisk walking 150 min/week).

How do doctors decide whether I need medication, a pacemaker, or an ablation for my arrhythmia?

They consider the type of arrhythmia, its frequency, symptoms, underlying heart disease, and response to initial drugs. Persistent symptomatic tachyarrhythmias may be treated with medication first; refractory cases or those causing heart‑failure may be referred for catheter ablation or, if the heart’s electrical system is failing, a pacemaker/ICD.

Arrhythmia

Arrhythmias are problems with the rate or rhythm of your heartbeat that can be harmless or require treatment to prevent heart damage.

Overview

What is an arrhythmia?

An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.

When your heart beats faster than normal, it's called tachycardia.
When your heart beats too slowly, it's called bradycardia.
When the signal to beat comes too early, it's called a premature or extra heartbeat. It may feel like your heart skipped a beat.

There are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is atrial fibrillation, which causes an irregular and fast heartbeat.

Some arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a heart‑healthy lifestyle can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias.

Causes & Risk Factors

What causes an arrhythmia?

Many factors can affect your heart's rhythm, such as having had a heart attack, smoking, congenital heart defects, and stress. Other factors that could increase your risk for some types of arrhythmias could include if you:

Have a family history of arrhythmias.
Have certain health conditions, which can include heart and blood vessel diseases, lung diseases, kidney diseases, obesity, and sleep apnea.
Are an older adult.
Have had recent surgery for your heart, lungs, or throat.
Take certain medicines for other health conditions.
Use illegal drugs.

If you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia.

Symptoms

What are the symptoms of an arrhythmia?

You may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your routine checkup. Symptoms of an arrhythmia can include:

Fast or slow heartbeat
Skipping, fluttering, or pounding heartbeats
Chest pain or discomfort
Dizziness or fainting
Shortness of breath
Sweating
Tiredness or weakness

Seek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack.

Diagnosis

How is an arrhythmia diagnosed?

To find out if you have an arrhythmia, your health care provider may order an electrocardiogram (EKG). This test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also:

Ask about your medical history, including your symptoms and lifestyle habits.
Do a physical exam, which includes checking your heartbeat and pulse.
Order blood tests and other heart tests.
Check your legs or feet for swelling.
Look for signs of other health conditions that could cause an arrhythmia, such as thyroid disease.

Treatment & Management

What are the treatments for an arrhythmia?

Treatment may include medicines, an implantable cardioverter‑defibrillator (ICD) or pacemaker, or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia.

The goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life‑threatening.

Prevention

Can arrhythmias be prevented?

To help prevent an arrhythmia, your provider may suggest that you make heart‑healthy lifestyle changes and treat health conditions that may cause arrhythmias.