An implantable cardioverter defibrillator (ICD) is a device used to manage tachycardia and protect against sudden cardiac arrest (SCA).
Knowing what an ICD is, how it works, and its risks and potential benefits can help you make decisions about your health with your healthcare team.
What is an ICD?
An ICD is a small, battery-powered electronic device that monitors and regulates the heart’s rhythm. It is implanted under the skin and connected to the heart with thin wires called leads.
Parts of an ICD
An ICD system has two parts: the defibrillator and leads.
- A defibrillator continuously monitors the heart and automatically corrects heart rhythms.
- Leads are thin, soft, insulated wires about the size of a spaghetti noodle. They carry the electrical impulse from the ICD to your heart. They also send information about the heart’s natural activity back to the ICD.
Why would my doctor recommend an ICD?
If your doctor told you that you need an ICD, you may have experienced or may be at risk of experiencing abnormal heart rhythms (arrhythmias) called ventricular tachycardia or ventricular fibrillation. These life-threatening rhythms can cause SCA, and can result in death if not immediately treated.
How does an ICD work?
An ICD is designed to monitor your heart rhythm 24 hours a day. If your heart is beating too fast or irregularly, some ICDs will first send small, painless electrical signals to correct your heart rate, which is called antitachycardia pacing. If the fast heart rate continues, the defibrillator will deliver a shock to restore your heart to a normal rate.
Some ICDs can also treat slow heartbeats by sending electrical pulses to the heart to correct them. Your doctor will program the ICD to deliver the most effective therapies for your specific heart condition.
As with any medical procedure, there are benefits and risks with implantable cardiac device therapy. Talk to your doctor to determine if an ICD is right for you.
What are the potential benefits and risks of ICD therapy?1
Benefits of an ICD
- Monitors your heart 24/7
- Peace of mind
- Return to normal activities
- Remote monitoring
Risks associated with an ICD implant include, but are not limited to:
- Infection at the surgical site and/or sensitivity to the device material
- Failure to deliver therapy when it is needed
- Receiving extra therapy when it is not needed
Steve’s story
Watch Steve’s story of surviving SCA and deciding to get an ICD.
It’s just a huge peace of mind if it does happen again ... I am going to survive it.”— Steve, living with an ICD
Prepare for a discussion with your doctor about getting an ICD.
Read a brochure about getting and living with an ICD and prepare for a discussion with your doctor.
Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.
