Methods:

This was a prospective study of 1,000 unselected patients who had cardiac troponin I (cTnI) measured on admission. The frequency and features of type 2 myocardial infarction were investigated with the use of novel developed criteria that included conditions reflecting an imbalance between myocardial oxygen supply and demand. Conditions with decreased oxygen supply were: anemia, shock, certain bradyarrhythmias, coronary embolus in the presence of an increased risk of embolism, and respiratory failure. Conditions with increased oxygen demand were: certain ventricular tachyarrhythmias, certain supraventricular tachyarrhythmias, hypertensive pulmonary edema, and arterial hypertension (systolic blood pressure >160 mm Hg) with echocardiographic evidence of left ventricular hypertrophy.