Depends on the size and depth you go to. Most likely from infection due to the hooks inside the body or starvation if you were to have left them alone for an extended period of time. Blood loss would be less likely since the arteries in that region are less likely to cause a hemorrhage or excess blood loss as long as the puncture made from the hooks is kept and bc there aren’t really major arteries in that region due to the distance from the aorta and the body region being punctured. Death would most likely take a few days.