Inclusion Criteria:  Condition after new onset of ST-elevation myocardial infarction (STEMI) Age 18-80 years HbA1c < 9.0 % Patients with diagnosis of diabetes mellitus according to DDG criteria (i.e. HbA1c ≥ 6.5 % or oral glucose tolerance test) Alternatively: Healthy patients with normal glucose tolerance according to DDG criteria (i.e. HbA1c < 5.9 % and normal OGTT) Patients capable of giving consent, hemodynamically stable, without sedation (e.g. opiates) or other interfering medication (e.g. catecholamines)  Exclusion Criteria:  Diabetes mellitus category 3 A-H (ADA criteria) Current pregnancy Infective diseases / fever Immunsuppressive therapy Severe chronic renal, liver or heart disease (e.g. Creatinin ≥ 1.6 mg/dl, peripheral arterial disease stage 4) Malignant cancer Severe chronic psychiatric illness or addiction Participation in an intervention trial