Why Would An ICD Deliver A Shock By Mistake?

 

An implantable cardioverter defibrillator (ICD) is designed to detect and treat dangerous heart rhythms. In some cases, it may deliver a shock when it is not required.

This can happen if the device misinterprets electrical signals or detects a rapid heart rate that is not life-threatening.

Common causes include fast rhythms originating in the upper chambers of the heart or electrical interference affecting how the device reads signals.

While these events can be concerning, they do not usually indicate a complete device failure. Instead, they often lead to adjustments in device settings or further monitoring.

Understanding how the device works can help provide reassurance in these situations.

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