Heart rhythm disorders, also called arrhythmias, affect how fast, slow or regularly the heart beats. Diagnosing an arrhythmia helps your care team understand what’s causing symptoms and choose the most effective treatment.
To diagnose an arrhythmia, your health care provider will review your medical history, perform a physical exam and recommend one or more heart rhythm tests. You may be referred to an electrophysiologist, a doctor who specializes in diagnosing and treating heart rhythm disorders.
Your provider will ask detailed questions about your symptoms and overall health. This information often provides important clues about the type of arrhythmia you may have.
Topics may include:
Understanding patterns in your symptoms helps guide which tests are most useful.
During a physical exam, your provider will:
While a physical exam alone cannot diagnose an arrhythmia, it can point to conditions that increase risk.
Many arrhythmias are intermittent, meaning they come and go. Because of this, more than one test may be needed to capture abnormal heart rhythms.
An ECG is a non-invasive test that records the heart’s electrical activity at a specific moment in time. It can identify rhythm problems such as:
ECGs are usually done at rest, but they may also be performed:
A Holter monitor is a portable ECG device worn for 24 to 48 hours. It continuously records heart rhythm during daily activities.
This test is helpful for detecting arrhythmias that do not appear during a short ECG. You may be asked to keep a diary of symptoms and activities to help identify possible triggers.
An event recorder is similar to a Holter monitor but is worn for several weeks, sometimes up to 30 days. You activate the device when symptoms occur.
Event recorders are useful when symptoms happen less often but are still concerning.
An echocardiogram is a non-invasive test that uses sound waves to create images of the heart.
It shows:
Echocardiograms help identify structural heart conditions that may increase the risk of arrhythmias or affect treatment choices.
An electrophysiology study (EPS) is performed in a cardiac catheterization laboratory. During the test, thin, flexible catheters are guided through blood vessels into the heart.
An EPS allows specialists to:
This test is often used when symptoms are significant, when non-invasive testing is unclear or when planning treatments such as catheter ablation or implantable device placement.
Once testing is complete, your care team uses the results to determine:
Treatment plans are personalized based on symptoms, overall health and lifestyle.
Treatment for arrhythmias may include lifestyle changes, medications or procedures. Some people need only monitoring, while others benefit from targeted therapy.
Healthy habits can reduce symptoms and lower the risk of arrhythmias.
Lifestyle changes may include:
These changes may also help prevent arrhythmias from developing or worsening.
Medications may be used to control heart rate, stabilize rhythm or treat related conditions.
Common medication types include:
When lifestyle changes and medications are not enough, procedures may be recommended.
Cardioversion may be used for arrhythmias such as atrial fibrillation or atrial flutter.
With electrical cardioversion, electrodes placed on the chest deliver a controlled shock that interrupts abnormal electrical signals and restores normal rhythm.
Catheter ablation is a minimally invasive procedure that treats arrhythmias by destroying abnormal electrical pathways.
During the procedure:
Catheter ablation may be recommended for atrial fibrillation, atrial flutter or certain types of ventricular tachycardia.
Newer approaches, such as pulsed field ablation or stereotaxis genesis, may improve safety and precision in select cases.
Learn more about catheter ablation options and how these procedures work.
In some cases, implantable devices are recommended when arrhythmias cannot be controlled with other treatments.
Learn more about implantable devices and other outpatient heart procedures.
Many people with arrhythmias require long-term follow-up. Regular visits help monitor symptoms, adjust treatment and reduce complications.
With proper diagnosis and care, many people with heart rhythm disorders are able to live active, healthy lives.
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