@hpboss84 Good place to come for information. Please though let your EP or cardiologist guide you in what you should be doing and not doing. My EP did not want me to wear a arm sling. Said could cause shoulder to freeze up from non activity and something he did not want me to have to go through. He is the Director of EP/Pace Clinic at Mayo Clinic Jacksonville.

I am on my 3rd ICD/Pacemaker. The first is always the worse. You will have some pain in the area and you need to limit moving your arm above your head as well as back and forth. I spent the night (24 hour watch) each time I had it done. Mine used a glue to close wound so healed quite quickly.

A ICD is a life safer. At first I was really afraid of it and having it in my body. My EP said to me "It is like having your own EMS there to give you life saving shock." And that is correct it will monitor your heart rymthm and take action if it does not resolve itself. The shock (I used to have many but medication have stopped that) is quite pronounced but it saves your life. Most of the time a EMS cannot get to you in time to save you or a long time to get to you.
Most of mine came after I fainted (tachacardyia). Are you having a pacemaker also? Mine was put in to help with heart rymthm. It will pace your heart on a regular basis which helps prevent tachacardia and low pulse problems or arrymthmia.
Bottom line it is a life saver and have grown to give me peace of mind kowing it is there to bring me back.