[Tests concerning the usefulness of serum myoglobin levels for the diagnosis of reperfusion in patients with imminent myocardial infarction].

Blood myoglobin, CPK and CK-MB activities were assayed in 32 patients with the acute myocardial infarction up to 360 minutes following the start of thrombolytic therapy. Plasma myoglobin, CPK and CK-MB activities increased significantly less in 18 patients in whom reperfusion of the coronary artery has been noted. Maximum increase in myoglobin levels preceded an increase in CPK and CK-MB activities and it may be an early marker of reperfusion.