ST-segment elevation myocardial infarction in a patient with anomalous origin of left circumflex coronary artery
Masahiro Yamamoto1, Kenichi Tsujita1, Kenshi Yamanaga1
1Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.
Insights
A case of myocardial infarction was linked to an anomalous left circumflex coronary artery. Intravascular ultrasound revealed atherosclerosis and plaque rupture, offering insights into disease development and management strategies.
Area of Science:
- Cardiology
- Vascular Biology
- Medical Imaging
Background:
- Anomalous coronary artery origins can predispose to cardiovascular events.
- Retroaortic course of the left circumflex coronary artery (LCX) is a rare anomaly.
- Understanding atherosclerosis in anomalous coronary arteries is crucial for patient management.
Purpose of the Study:
- To present a case of ST-segment elevation myocardial infarction (STEMI) in the territory of a retroaortic anomalous LCX.
- To elucidate the pathological mechanisms of atherosclerosis in this specific coronary anomaly using intravascular imaging.
- To highlight the role of intravascular ultrasound (IVUS) in assessing disease progression and guiding management.
Main Methods:
- Case report of a patient with STEMI and retroaortic LCX.
- In vivo coronary imaging using intravascular ultrasound (IVUS).
- Analysis of atherosclerotic changes, plaque rupture, and thrombus formation at the culprit lesion.
Main Results:
- IVUS visualized typical atherosclerotic changes, plaque rupture, and thrombus formation in the anomalous LCX.
- Atherosclerosis developed despite the absence of a clear mechanical cause of ischemia in the retroaortic LCX.
- IVUS provided detailed pathological insights into the culprit lesion.
Conclusions:
- Ordinary atherosclerosis can develop in a retroaortic anomalous LCX, independent of mechanical compression.
- IVUS is valuable for understanding the pathophysiology of atherosclerosis in anomalous coronary arteries.
- Findings can inform clinical decision-making for managing patients with anomalous LCX and coronary artery disease.
Abstract:
We present a case of ST-segment elevation myocardial infarction in the territory of an anomalous left circumflex coronary artery running through the retroaortic region. In vivo coronary imaging with intravascular ultrasound visualized the usual atherosclerotic change and subsequent plaque rupture and thrombus formation at the culprit lesion. The clarification of pathologic mechanisms underlying the myocardial infarction case could provide information about pathophysiology of atherosclerotic development in anomalous left circumflex coronary artery, and could help in decision-making regarding the management strategy. <Learning objective: Intravascular ultrasound (IVUS) imaging indicated that ordinary atherosclerosis could develop at retroaortic anomalous course of left circumflex coronary artery (LCX) despite absence of mechanical cause of ischemia. IVUS screening could provide significant information about pathophysiology of atherosclerotic development in anomalous LCX, and could help in decision-making regarding the management strategy. The images and discussion have high educational value for clinical cardiologists alike.>.
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