But you are assuming, I am glad you admitted that. Going back to gunshot wounds which it sounds like you know a lot about, have you ever heard or maybe you have seen a person shot through the heart who continues to move around ?
Of course I am assuming. We are all assuming since we don't have inside knowledge.
Move? Depends on the shot to the heart. I can hit you small caliber in certain areas of the heart you will continue to beat, talk etc...
You won't be moving much once you stop getting oxygen to the brain and muscles and with no beating heart, loss of blood, and missing branches you aren't getting oxygen to the brain or muscles.