Clinical Research Directory

Inclusion Criteria: * Age 65 years or older at hospital admission. * Hospitalization for acute coronary syndrome (ST-elevation myocardial infarction, non-ST-elevation myocardial infarction, or unstable angina) at one of the two participating centers, diagnosed according to applicable clinical guidelines; myocardial infarction must meet the Fourth Universal Definition criteria for type 1 myocardial infarction. * Ability to undergo the baseline functional and nutritional assessment during hospitalization (interview of the patient or caregiver and attempted measurements according to the protocol). Inability to obtain an individual measurement (for example, height, previous body weight or calf circumference) or to complete the Short Physical Performance Battery does not preclude enrollment. * Written informed consent to participate in the study. Exclusion Criteria: * Type 2-5 myocardial infarction, myocardial infarction with non-obstructive coronary arteries (MINOCA), myocarditis, or takotsubo cardiomyopathy. * Inability to provide informed consent or to answer the assessment questions because of cognitive impairment (by the investigator's clinical judgement), severe psychiatric illness, or impaired consciousness. * Acute cerebrovascular event with severe neurological deficit. * Terminal illness or expected survival of less than one month due to cancer or another incurable condition. * Previous enrollment in the study (repeat hospitalization of an already enrolled participant). Patients with cognitive impairment may be included if they retain the ability to understand the study information, provide informed consent, and respond to assessment questions; information about pre-event functional status may be supplemented by a caregiver.