Couple walking bicycles on a sunny day
Couple walking bicycles on a sunny day

Looking Ahead to Life’s Promise
and Purpose

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Pacemaker and ICD Patients

Learn about the latest Merlin@home™ System cybersecurity updates.

What Is an Arrhythmia?

Arrhythmia is an abnormal heart rhythm that develops when disease or injury causes your heart’s electrical signals to change from normal to abnormal.

Slow heartbeat

Fast heartbeat

Early or extra heartbeat

Tests and diagnoses

Treatment Options

Today’s treatments help more people than ever manage their arrhythmia and improve their quality of life.

Bradycardia treatment

Tachycardia treatment

Premature ventricular contraction treatment

Other treatments

Talking about your options

Getting Treatment

Whether you are getting a pacemaker, ICD or cardiac ablation, you are taking a major step toward feeling better. 

Receiving an implanted device

Cardiac ablation procedures

Recovering after the procedure


Tell us your story

Tell Us Your Story

If you have benefited from one of our products, share your story and contact us.



Find definitions of technical terms in our glossary.

Guides and brochures
Guides and Brochures

Find guides and brochures about cardiac arrhythmias and treatment.


Our Traveling Patient Clinic Locator helps you find clinics in select countries that work with certain St. Jude Medical™ devices.

Safety and use information

Safety and Use

Find important safety and use information for our implantable devices.

Frequently Asked Questions (FAQs)


Find answers to your questions about cardiac arrhythmias.


animations and videos, including patient stories to help you learn about arrhythmia treatment and monitoring.