Inadequate coronary blood flow quickly results in reduced blood flow in the affected area. The position and degree of the infarct determine the effects on cardiac function. Inadequate blood supply depresses cardiac function and generates autonomic nervous system responses that exacerbate the relation between myocardial oxygen supply and demand. Continuous ischemia leads to tissue necrosis and scar tissue formation, with enduring loss of myocardial contractility in the affected area. Cardiogenic shock may develop because of insufficient CO from decreased myocardial contractility and pumping capacity. The pain and anxiety linked to myocardial infarction, triggers the sympathetic nervous system, which leads to systemic vasoconstriction and cardiac
