Understanding Replacement of an Implantable Heart Device

An implantable cardiac device runs on a battery. This battery usually lasts for several years. The length of your battery life depends on how often your device is working to control your heart rhythm. A battery meter lets your healthcare provider know when the battery is getting low on energy. When it has only a few months of energy left, replacement is recommended. If the battery reaches the end of its life, the device may not work correctly or may revert to a low energy mode. A device may have to be replaced sooner if it stops working correctly, or if you develop an infection.

The replacement procedure is often shorter and simpler than the first implantation. It's often done as an outpatient procedure, and you can go home the same day. In many cases, only the generator needs to be replaced. If the wires (leads) that connect the device to your heart are working correctly, they don't need to be replaced.

During the procedure:

• The skin over the device is sterilized with cleaning solution and draped.

• A new incision (cut) is made over the old incision.

• The device is removed from the pocket.

• The leads are checked to make sure they work correctly.

• The healthcare provider detaches the old device from the leads.

• The healthcare provider attaches the new device to the leads. This is tested to make sure it works correctly.

• The device is put back under the skin.

• The incision is closed.

• The healthcare provider programs the device’s settings to correctly help your heart.

The most common serious risk of this procedure is infection. Other risks include bleeding, severe bruising, or swelling at the incision site.