“How do you strengthen your heart after a heart attack?”

After a heart attack there is a healing process that ensues. I assume you had a heart cath and balloon and stent to open up the artery. Return of blood flow reduces the damage ultimately but temporarily the showering down stream of blood clot and inflammatory molecules can cause “stunning” of muscle cells and cause reversible dysfunction. Certain medications reduce the likelihood of “negative remodeling” or a healing process that puts strain on the surrounding undamaged muscle. These include beta blockers, ACE inhibitors and statins. Modest exercise and a heart healthy diet rich in anti oxidants is also advisable. Hope this helps!