Myocardial Infarction
Myocardial Infarction (MI), also known as heart attack is caused when blood supply decreases or completely stops to a portion of the myocardium (heart muscle). A heart attack may be silent and go unnoticed; or else it could be fatal resulting in hemodynamic deterioration and sudden death.
Without a blood supply, the oxygen supply to the heart is disrupted. Prolonged lack of oxygen results in heart muscle damage and they begin to die.