Are myocardial infarctions curable?

No. A myocardial infarction is an acute event in which a portion of the heart is irreversably destroyed, usually by a blocked artery. The major lesson is that this damage is potentially avoided if people come to an er promptly when they have symptoms, which have been discussed elsewhere. We have a short time window to use modern treatment to save the heart and prevent complications and death.
Yes and no. Well if you truly had a myocardial infarction, some of the heart muscle has been damaged and that is not curable. But you may do well if it is just a small amount of muscle. And even if it is a larger amount, medications can improve the symptoms so that you may di fine even if there is not a cure.