Here you go
Allo mate… ICDs (implantable define) will only deliver 6 to 8 (depending on manufacturer) therapies in a row. So if a patient dies before the device is switched off, it’ll deliver 6 shocks only and then do nothing else. But remember, they only shock rhythms that are extremely fast and coming from the main pumping chambers. So if the patients heart stops, it won’t shock them. Most of them also have pacing (delivering small amounts of energy to make the heart contract like a normal pacemaker), and will continue to do so after death. But if the heart is dying or already dead, pacing it won’t do anything either. Basically they abort sudden cardiac death, but if the patient is dying it won’t prevent them from dying.
This is a video of Anthony Van Loo who has an ICD in situ. He has an episode of sudden cardiac death which the ICD shocks him out of