The study will include consecutive patients who present to the cardiology emergency department at Heidelberg University Hospital with symptoms of acute coronary syndrome or a troponin increase (hs-TnT >14 ng/L). Additional inclusion criteria are a minimum age of 18 years and providing informed consent through written consent to participate in the study. The following medical conditions are intended to be distinguished from one another:

• Acute myocardial infarction
• Unstable angina pectoris
• Myocarditis
• Heart failure
• Cardiomyopathies
• Pulmonary embolism
• Renal insufficiency
• Supraventricular and ventricular tachycardias
• Hypertensive crisis
• Non-cardiac chest pain

Exclusion criteria are defined according to GCP (Good Clinical Practice), i.e., mental illnesses/dementia (lack of capacity to provide informed consent), pregnancy/breastfeeding, as well as acute conditions requiring immediate treatment (e.g., cardiogenic shock).