Clinical work-up results: stress test before discharge positive or negative, transthoracic echocardiography: wall motion abnormalities, LVEF, valvular heart disease, structural heart disease, Endpoint(s): primary safety endpoint defined as survival free of all-cause death, secondary endpoints: survival free of death or MI, survival free of death/MI/re-hospitalisation for ACS, survival free of death/MI/rehospitalisation for non-elective revascularization