Automatic Implantable Cardiovertor Defibrillator
From a procedural point of view there is very little difference between a pacemaker and an ICD. They are implanted in the same way and same place. The ICD box is a little bigger and thicker than a pacemaker box. The leads are slightly different but you will not notice any difference.
The only difference is that usually the ICD is checked to see if it works properly before leaving the theatre. You will be sedated for this part and most likely not remember it.
Again, a dressing is applied over your wound and you will be instructed not to move your arm above shoulder height for a day so you don’t dislodge the lead(s). Your ICD will be check the following morning.