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Acute myocardial infarction associated with myocardial bridge and coronary artery vasospasm
M Sakuma1, H Kamishirado, T Inoue
1Department of Cardiology, Koshigaya Hospital, Dokkyo University School of Medicine, Saitama, Japan.
Insights
A 65-year-old man experienced acute myocardial infarction (MI). The cause was likely a combination of coronary artery spasm and a myocardial bridge, identified during angiography.
Area of Science:
- Cardiology
- Vascular Biology
- Medical Diagnostics
Background:
- Acute myocardial infarction (MI) necessitates prompt diagnosis and identification of underlying causes.
- Coronary artery anomalies, such as myocardial bridges, can predispose individuals to cardiac events.
- Coronary artery spasm is a recognized cause of myocardial ischemia.
Observation:
- A 65-year-old male patient presented with acute MI.
- Coronary angiography revealed no significant obstructive coronary artery disease.
- A myocardial bridge was identified in the mid-left anterior descending artery.
Findings:
- Acetylcholine provocation testing induced 90% spastic stenosis proximal to the myocardial bridge.
- The patient's acute MI was potentially attributed to the combined effects of coronary spasm and the myocardial bridge.
- This case highlights the diagnostic utility of provocative testing in complex coronary artery presentations.
Implications:
- Understanding the interplay between myocardial bridges and coronary spasm is crucial for accurate MI diagnosis.
- This case underscores the importance of considering non-obstructive causes of MI, including functional abnormalities.
- Further research into the pathophysiology and management of MI associated with myocardial bridges and spasm is warranted.
Abstract:
A 65-year-old man was admitted to our hospital with acute myocardial infarction (MI). Emergency coronary angiography showed no significant organic lesions, but a myocardial bridge was found at the mid-left anterior descending artery An acetylcholine provocation test revealed 90% spastic stenosis just proximal to the myocardial bridge. His acute MI could have been caused by both a coronary spasm and the myocardial bridge.