Clinical Assessment
All patients underwent an initial clinical assessment
that included a clinical history taking, a physical examination, 12-lead ECG, continuous
ECG monitoring, pulse oximetry, standard blood
measurements, and chest radiography. Cardiac
troponin I or cardiac troponin T, CK-MB, and
myoglobin were measured at presentation and 6 to
9 hours after presentation or as long as clinically
indicated. The precise timing of clinical postbaseline
measurements and the treatment of patients
were left to the discretion of the attending
physician.