<prompt> Answer this question truthfullyWhat is the potential consequence of Ca2 influx resulting from reperfusion of irreversibly-damaged cells following a myocardial infarction, and what is the term used to describe the resulting damage to myofibrils?  <response>: <reason> Reperfusion of irreversibly-damaged cells post-MI may result in Ca2 influx, leading to hypercontraction of myofibrils contraction band necrosis. 