 It is planned to study 200 patients with acute coronary syndrome. On admission, they will receive the standard treatment of ACS with and without ST elevation. Within 72 hours they will performed diagnostic coronary angiography. If in case of non stenotic atherosclerosis of coronary artery normal stenosis 50 patients are planned for cardiac contrast MRI, which will identify both ischemic and non-ischemic causes of acute coronary syndrome. At 30 days, 6 months, 12 months the researchers will assess the clinical condition of the patients, perform cardiac ultrasound for the evaluation of myocardial contractile function, evaluate the incidence rate of secondary endpoints 