Replacing your heart device is typically easier and quicker than your first implant procedure. Your doctor makes an incision, removes your current heart device, and checks to see if your leads are still in good working condition. If not, your doctor will implant new leads. Your doctor connects the leads to the new heart device, tests it, and implants it — usually in the same place as your previous heart device. Your doctor then closes the incision and programs the features of your new heart device.