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Paradoxical embolism to the left main coronary artery: visualization by transesophageal echocardiography
1Pennsylvania Heart and Vascular Group, Meadowbrook, Pennsylvania 19046, USA.
Insights
A rare case of myocardial infarction was identified, caused by a blood clot traveling from leg veins to the heart's main artery. This paradoxical embolism occurred through a patent foramen ovale, a heart defect.
Area of Science:
- Cardiology
- Vascular Medicine
- Diagnostic Imaging
Background:
- Myocardial infarction (MI) is a leading cause of mortality worldwide.
- Paradoxical embolism, where venous thrombi migrate to the arterial circulation, is a rare but serious complication.
- Patent Foramen Ovale (PFO) is an atrial septal defect that can facilitate paradoxical embolism.
Observation:
- Transesophageal echocardiography (TEE) revealed a thrombus in the left main coronary artery.
- The thrombus was mobile and appeared to originate from a venous source.
- An associated patent foramen ovale was identified as the potential route for embolism.
Findings:
- The left main coronary artery thrombus was visualized in real-time using TEE.
- The case demonstrates a direct link between venous thrombus, PFO, and acute coronary syndrome.
- This finding highlights an unusual etiology for myocardial infarction.
Implications:
- This case underscores the importance of considering paradoxical embolism in the differential diagnosis of myocardial infarction, especially in younger patients or those without typical risk factors.
- Transesophageal echocardiography is a valuable tool for diagnosing complex cardiac thrombus and identifying associated intracardiac shunts.
- Further investigation into the management of venous thromboembolism in patients with PFO may be warranted.
Abstract:
A case of myocardial infarction is described with transesophageal echocardiography visualization of left main coronary artery thrombus arising from paradoxical embolism of mobile venous thrombus by patent foramen ovale.