Medically reviewed by Gunjan J. Shukla, MD

If you’re at risk for a dangerous heart rhythm, your doctor may recommend an implantable cardioverter defibrillator (ICD). These devices can help treat sudden cardiac arrest by monitoring your heart and providing treatment when needed.

A newer type of ICD, called an extravascular ICD (EV-ICD), offers the same lifesaving protection while keeping the device’s lead outside the heart and blood vessels.

How Is an EV-ICD Different?

Traditional ICDs use a thin wire, called a lead, that travels through a blood vessel and into the heart.

With an EV-ICD, the lead is placed outside the heart and blood vessels, just beneath the breastbone. Because the lead stays outside the bloodstream, it may help lower the risk of some long-term problems like infection. Additionally, if there is an issue with the wires, they are easier to remove.

What Does the Device Do?

Like all ICDs, an EV-ICD continuously monitors the heart’s rhythm.

If a dangerous rhythm is detected, the device can deliver a shock to help restore a normal heartbeat which saves lives.

The EV-ICD can also use small electrical signals to stop certain fast heart rhythms before a shock is needed. This feature uses small electricals signals to stop some fast heart rhythms and may help patients avoid receiving a shock altogether.

What Are the Benefits of an EV-ICD?

An EV-ICD may offer several advantages, including:

• Protection against life-threatening heart rhythms and sudden cardiac arrest
• A lead that stays outside the heart and blood vessels
• Treatment options that may reduce the need for shocks
• A smaller device that is placed under the arm and may be less noticeable
• A battery that can last more than 10 years for many patients

Is an EV-ICD Right for Everyone?

No. The best device depends on each person’s heart condition, medical history and treatment needs.

Some patients may be better candidates for a traditional ICD, while others may benefit from an EV-ICD. An electrophysiologist can help determine which option is right for you.

More Options for Heart Care

New advances in heart care are giving patients more treatment choices. The EV-ICD is one example of how new technology is helping doctors provide more personalized care.

WMCHealth’s cardiology team offers advanced treatment options for heart rhythm conditions and can help patients understand which therapies may be right for them.

To learn more about advanced heart and vascular care at WMCHealth visit our website.