Percutaneous coronary intervention (PCI) is the preferred treatment for myocardial infarction because it directly opens the blocked coronary artery. Using a catheter, doctors inflate a balloon and usually place a stent to keep the artery open, restoring blood flow to the heart muscle. PCI is most effective when performed quickly, ideally within 90 minutes of arriving at the hospital, as early treatment saves heart tissue and improves survival. It is generally safer and more effective than clot-busting medications, with lower risks of recurrent heart attack and major bleeding. The main limitation is that it requires specialized facilities and expertise, so not all hospitals can perform it.