When i get my pacemaker/defibrillator changed. am i supposed to be awake? the nurse said i won't feel anything but will be able to answer questions.

Pacemaker change: When a pacemaker or defibrillation generator device is changed, typically light sedation is used for comfort, and topical anesthesia is used in the skin above the pocket (like Lidocaine such as used for stitches and dental work). As long as the pacemaker/defibrillator wires (leads) can still be used for the new one, a generator change is much quicker than the original implantation.

Sleepy: You'll be given medications that will make you drowsy and take away nervousness (such as versed and fentanyl) but you will be awake enough to answer questions. The pacemaker site will be numbed with local anesthetic so all you might feel after the numbing is a bit of tugging but it shouldn't hurt. If it does you'll be awake enough to tell the nurses who will give you more medications.