1. Bleeding or hematoma, and infection where the implantable cardioverter defibrillator (ICD) was implanted.
2. Allergic reaction to the medications used during the procedure.
3. Damage to blood vessels.
4. Bleeding in the pericardium.
5. The implantable cardioverter defibrillator (ICD) sends abnormal signals to the heart or malfunctions or the leads come loose.
6. Stroke, heart attack, or other serious complications, which are uncommon.
7. Death (rare).

1. Bleeding, swelling or increased pain at the implantation site
2. Fever
3. Dizziness
4. Fainting
5. Chest pain
6. Difficulty breathing

Medication.