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Left main coronary artery dissection during cardiac catheterization
M J Curtis1, M Traboulsi, M L Knudtson
1Department of Medicine, Foothills Hospital, Calgary, Alberta.
Insights
An acute angle takeoff of the left main coronary artery may increase the risk of dissection during coronary angiography. This rare complication can lead to severe cardiac events, even after surgery.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Pathology
Background:
- Left main coronary artery dissection is a rare but potentially fatal complication during coronary angiography.
- Anatomical variations in coronary artery origins may predispose individuals to iatrogenic injury.
Observation:
- A 70-year-old male experienced fatal left main coronary artery dissection during angiography, despite emergency coronary artery bypass grafting.
- Autopsy revealed an acute angle takeoff of the left main coronary artery, with dissection originating at the aorta junction.
- The patient had severe right coronary atherosclerosis and circumferential subendocardial left ventricular infarction secondary to left main stenosis.
Findings:
- The left main coronary artery exhibited mild atherosclerosis and no cystic medial necrosis.
- An angulated origin of the left main coronary artery was identified as a potential risk factor for dissection during angiography.
Implications:
- This case highlights the importance of recognizing anatomical risk factors for iatrogenic coronary artery dissection.
- Awareness of angulated left main coronary artery takeoff may prompt modified procedural techniques during angiography.
- Further research into pre-procedural risk stratification for coronary angiography complications is warranted.
Abstract:
A 70-year-old man with a downward sloping origin of the left main coronary artery developed left main dissection at coronary angiography and died despite emergency coronary by-pass surgery. Autopsy showed that the left main coronary artery had an acute angle take off and dissection had originated at the junction of the superior wall of the left main and the aorta. The combination of left main stenosis secondary to dissection and severe right coronary atherosclerosis had caused circumferential subendocardial left ventricular infarction. The left main coronary artery had mild atherosclerosis and lacked cystic medial necrosis. An angulated left main coronary artery may be a risk factor for dissection at angiography.