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Acute Myocardial Infarction with Severe ST Segment Elevation Treated with Percutaneous Coronary Intervention More than Two Days after Onset: A Case with Remarkable Recovery.

The patient was a 65-year-old man with marked ST-elevation myocardial infarction. Cardiac catheterization revealed an occluded middle portion of the left anterior descending artery and no collateral circulation. Percutaneous coronary intervention (PCI) was performed, and ST elevation improved 5 days after PCI. Almost all electrocardiogram (ECG) findings were normal 6 months later. Echocardiographic findings were also normal. This case was very successful and unusual in that no ventricular aneurysm formed despite ST elevation continuing for a few days and that ECG and left ventricular function were nearly normal after PCI performed days after the onset in a case without collateral circulation.