Left Main Coronary Artery Compression by Pulmonary Aneurysm
Imaging findings
Coronary CT angiography and catheter angiography demonstrate severe pulmonary arterial hypertension with a giant pulmonary artery aneurysm. The dilated pulmonary artery compresses the origin of the left main coronary artery, causing severe ostial stenosis.
Key takeaways
Left main coronary artery compression is a known, serious complication of giant pulmonary artery aneurysms in severe pulmonary hypertension. The dilated pulmonary trunk exerts extrinsic mass effect on the left main coronary ostium, causing angina or ischemia.
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