A non-transmural anterior wall infarction due to a subtotal stenosis of the anterior interventricular branch occurred in a 76-year-old man. Angiocardiography 5 weeks later demonstrated an anterior wall infarct with aneurysm. The ECG showed Q waves without any R waves and elevated ST segments in leads V2-V4. Percutaneous transluminal balloon angioplasty (PTCA) of the stenosed artery supplying the infarct area was performed. Two months later the aneurysm was no longer demonstrable by laevocardiography. The ECG changes of the anterior-wall infarct completely regressed over a 5-month period. A second PTCA was later performed because the artery had re-stenosed. The patient has remained free of angina. This case illustrates that even in the presence of ECG signs of a transmural infarct and an angiographically documented ventricular aneurysm indications for recanalization of the infarct vessel by PTCA should be widely set.