What Is The Difference Between A Pacemaker And An ICD?

 

Pacemakers and ICDs are small devices placed under the skin to monitor and support the heart rhythm. They may look similar from the outside, but they are used for different reasons.

A pacemaker is mainly used when the heart beats too slowly. An ICD is used when there is a risk of dangerous fast rhythms that could lead to cardiac arrest.

When A Pacemaker May Be Recommended

A pacemaker may be considered if the heart rate drops too low and causes symptoms such as fainting, dizziness, fatigue, or blackouts.

Common reasons include heart block, sick sinus syndrome, or a slow heart rate caused by medicines that are needed for another rhythm problem.

The pacemaker gives small electrical signals to stop the heart from going too slowly.

When An ICD May Be Recommended

An ICD is used for people at risk of life-threatening ventricular rhythms.

It may be recommended after a cardiac arrest, after sustained ventricular tachycardia, or in people with certain high-risk heart muscle or inherited rhythm conditions.

The ICD can monitor the rhythm and deliver treatment if a dangerous rhythm occurs.

What They Have In Common

Both devices usually need a small procedure, follow-up checks, and a device identification card. Many people can return to daily activities after recovery, with some precautions around driving, strong magnets, and impact to the device area.

A pacemaker supports a heart that is too slow. An ICD protects against dangerous fast rhythms. The right device depends on the rhythm problem and the level of risk.

If symptoms are severe, sudden, or worsening, call 999 immediately.

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