Conclusion:
Atherosclerotic coronary artery disease is the main cause of STEMI.
While coronary embolism is rare and often not considered in the
differential of acute coronary syndrome; it is of utmost importance for
clinicians to keep a wide differential of nonatherosclerotic causes of
STEMI especially when the patient is young, without significant cardiac
risk factors, and has no visible atherosclerosis on angiography.