Your previous post mentions you have had a heart attack. Are they thinking about giving you a pacemaker due to irregular heart rhythms (atrial fib or flutter)? If so, they may give you a ICD or Implantable Cardioverter Defibrillator. Those are a little bit bigger in size than a regular pacemaker.
If they decide that you require a pacemaker or ICD pay attention to where they will place the device. This is usually the left or right side of your chest. I now have my pacemaker placed just off center of my chest. This avoids the straps rubbing against it when I jump. Not a huge issue, but something to think about.
Best of luck,
BNB