An ICD also has the functions of a pacemaker. An ICD comprises a battery (the generator), and leads that connect the generator to the heart muscle.
What is involved in an ICD implantation?
An ICD implantation generally takes about 1 hour. This is usually performed under local anaesthetic and general sedation. A small incision is made below the collar bone and the ICD generator is placed under the skin and fat layers. The leads enter a vein near the collar bone and are guided to the heart using an X-ray machine.
Patients routinely stay overnight following ICD implantation. The battery life of an ICD is about 5-8 years, depending on how often it delivers shocks, and the battery may be replaced when it runs out. Patients with an ICD will need routine follow-up to ensure the ICD is working properly.
When are ICDs considered?
ICDs may be considered in certain patients who have dangerous heart rhythms, and in patients who have significant heart failure who are at risk of abnormal heart rhythms.