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Left Coronary Artery Ligation: A Surgical Murine Model of Myocardial Infarction
Published on: August 9, 2022
A case of left ventricular aneurysm caused by localized myocardial infarction
Tomoyuki Watanabe1, Masumi Iwai-Takano2, Yuriko Ohto3
1Division of Cardiology and Internal Medicine, Health Co-op. Watari Hospital, 34 Nakaecho, Watari, Fukushima, 960-8141, Japan. t-watana@fmc.u-coop.or.jp.
Insights
A 73-year-old man developed a true cardiac aneurysm following an asymptomatic myocardial infarction. Diagnostic imaging confirmed a dyskinetic, low-perfusion cavity in the anterior wall, requiring ongoing echocardiographic monitoring.
Area of Science:
- Cardiology
- Medical Imaging
- Cardiac Surgery
Background:
- Unstable angina pectoris can indicate underlying coronary artery disease.
- Percutaneous coronary intervention is a common treatment for acute coronary syndromes.
- Cardiac aneurysms, though rare, can be a complication of myocardial infarction.
Purpose of the Study:
- To report a case of incidentally discovered true cardiac aneurysm.
- To illustrate the diagnostic utility of multimodal imaging in characterizing cardiac abnormalities.
- To highlight the management and follow-up of asymptomatic cardiac aneurysms.
Main Methods:
- Left ventriculography to visualize cardiac structures.
- Echocardiography to assess wall motion and cavity characteristics.
- Myocardial contrast echocardiography to evaluate myocardial perfusion.
- Myocardial scintigraphy for localized defect assessment.
Main Results:
- Incidental finding of an anterior wall cardiac cavity during left ventriculography.
- Echocardiography revealed a dyskinetic cavity wall with reduced radial strain.
- Myocardial contrast echocardiography demonstrated low perfusion in the cavity wall.
- Myocardial scintigraphy confirmed a localized anterior wall defect.
Conclusions:
- A true cardiac aneurysm was diagnosed in a patient with asymptomatic myocardial infarction.
- Multimodal imaging techniques effectively characterized the aneurysm's features.
- Serial echocardiography is crucial for monitoring asymptomatic cardiac aneurysms.
Abstract:
A 73-year-old man was hospitalized for unstable angina pectoris with no history of myocardial infarction. After undergoing percutaneous coronary intervention, left ventriculography incidentally revealed a cavity in the anterior wall, and echocardiography found the cavity wall to be dyskinetic. Myocardial contrast echocardiography revealed that the wall of the cavity was surrounded by myocardial tissue with low perfusion. Furthermore, radial strain in the wall of the cavity was low. Myocardial scintigraphy showed a localized defect on the anterior wall. The patient was finally diagnosed as true aneurysm after asymptomatic and localized myocardial infarction, and has since been followed up by echocardiography in the outpatient clinic.
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