Examples for usage of the online calculator tool. A patient with age of 70 years, normal weight, no history of coronary artery disease or myocardial infarction, metabolic equivalent of task > 4, intermediate risk of surgery according to the European Society of Cardiology, elective surgery, planned duration of surgery of 100 min, no anaemia, normal level of thrombocytes, and a high-sensitivity cardiac troponin T of 3 ng/L has a risk of perioperative myocardial infarction/injury of 1.6% (A). A patient with age of 75 years, underweight, history of coronary artery disease without myocardial infarction, metabolic equivalent of task < 4, intermediate risk of surgery according to the European Society of Cardiology, elective surgery, planned duration of surgery of 150 min, mild-to-moderate anaemia, normal level of thrombocytes, and a high-sensitivity cardiac troponin T of 12 ng/L has a risk of perioperative myocardial infarction/injury of 20.7% (B). A patient with age of 80 years, overweight, history of coronary artery disease with myocardial infarction, metabolic equivalent of task < 4, high risk of surgery according to the European Society of Cardiology, urgent surgery <24 h, planned duration of surgery of 60 min, mild-to-moderate anaemia, thrombocytosis, and a high-sensitivity cardiac troponin of 30 ng/L has a risk of perioperative myocardial infarction/injury of 44.5% (C). PMI, perioperative myocardial infarction/injury; BMI, body mass index; CAD, coronary artery disease; MI, myocardial infarction; MET, metabolic equivalent of task; ESC, European Society of Cardiology; WHO, World Health Organization.