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A case of normal coronary infarction after intracoronary thrombolysis with urokinase
Insights
A myocardial infarction case highlights that coronary thrombi can form in normal arteries, potentially due to minimal atheroma or spasm. Thrombolytic therapy may help recanalize arteries and save heart muscle.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Myocardial infarction (MI) diagnosis often involves identifying coronary artery blockages.
- The etiology of MI in the absence of significant coronary artery disease (CAD) is less understood.
Observation:
- A 50-year-old male presented with ECG findings indicative of inferior wall MI.
- Intracoronary thrombolysis fragmented a thrombus in the right coronary artery.
- Follow-up angiography revealed no abnormalities, and ergonovine testing did not induce spasm.
Findings:
- This case suggests that occlusive thrombi causing MI can arise in angiographically normal coronary arteries.
- Transient changes in minimal atheromatous plaques or coronary artery spasm may precipitate thrombus formation.
Implications:
- Thrombolytic therapy can expedite recanalization of occluded coronary arteries.
- Early intervention may facilitate myocardial salvage even in cases without significant underlying CAD.
- Understanding these mechanisms is crucial for managing MI with unclear etiology.
Abstract:
We report the case of a 50-year-old male who had classical ECG signs of inferior wall myocardial infarction. Intracoronary thrombolysis resulted in fragmentation of a thrombus in the lumen of the right coronary artery. Angiography 1 month later showed no abnormalities at the site of previous thrombus. Ergonovine stress did not produce spasm. We conclude that (1) a mild cardial infarction can occur with an occlusive thrombus arising in angiographically normal coronary arteries; (2) transient change in minimal atheromata or spasm may induce such thrombi; and (3) thrombolytic therapy may be able to expedite recanalization of the occluded artery and salvage the myocardium.