A patient with a non-ST segment elevation myocardial infarction (NSTEMI) is receiving heparin. What is the purpose of the heparin?

Platelet aggregation is enhanced by IV heparin infusion.

Heparin will prevent the development of clots in the coronary arteries.

Coronary artery plaque size and adherence are decreased with heparin.

Heparin will dissolve the clot that is blocking blood flow to the heart.