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[Coronary microembolization in acute coronary syndrome: indicative hypothesis or still unknown phenomenon?
Carmelo A Maugeri Saccà1, Francesco Saporito, Daniela Lo Balbo
1Dipartimento Clinico-Sperimentale di Medicina e Farmacologia, Sezione di Cardiologia, Università degli Studi, Policlinico G. Martino Via Consolare Valeria, 98100 Messina.
Insights
Aggressive thrombolytic therapy for acute myocardial infarction (MI) may paradoxically cause microembolization. This case suggests potent treatments could extend MI damage, highlighting a potential treatment complication.
Area of Science:
- Cardiology
- Vascular Biology
- Interventional Cardiology
Background:
- Acute myocardial infarction (MI) is often caused by atherosclerotic plaque rupture.
- Alternative mechanisms include microembolization during procedures or from ulcerated plaques.
- Effective thrombolytic therapy is crucial for managing MI.
Observation:
- A patient receiving alteplase + abciximab (TIMI 14) for anterior MI showed ST elevation changes.
- Initial anterior ST elevation resolved, replaced by inferior ST elevation and subsequent Q waves.
- Coronary angiography revealed isolated 60% stenosis in the left anterior descending artery.
Findings:
- The observed ST elevation pattern suggests a shift in infarct location or extension.
- The timing of ECG changes coincided with aggressive thrombolytic administration.
- A potential link between potent thrombolysis and microembolic events is proposed.
Implications:
- This case questions whether aggressive thrombolytic treatments can paradoxically cause microembolization.
- It highlights the need to consider iatrogenic causes of MI extension.
- Further research into the risks of microembolization with potent thrombolytics is warranted.
Abstract:
Acute myocardial infarction may result from rupture or fissuring of atherosclerotic plaque in a coronary artery. Sometimes a different pathogenesis occurs like microembolization following lysis from ulcerated plaque or during pharmacological or interventional procedures. We describe a patient with anterior myocardial infarction treated with alteplase + abciximab (TIMI 14). At the end of thrombolytic therapy administration, we observed a marked reduction of anterior ST elevation associated with a simultaneous occurrence of ST elevation in the inferior leads, later followed by inferior Q waves. The coronary angiogram demonstrated an isolated 60% stenosis on the left anterior descending artery. This case raises the question on whether the very effective and aggressive thrombolytic treatment was paradoxically responsible for microembolization resulting in myocardial infarction extension.