Retrograde dissection of the left main coronary artery after endarterectomy: a rare complication

Area of Science:

• Cardiovascular Surgery
• Pathology
• Interventional Cardiology

Background:

• Coronary artery bypass grafting and endarterectomy are procedures to restore blood flow in blocked coronary arteries.
• Complications can arise, necessitating thorough post-mortem examination to understand fatal outcomes.

Observation:

• A 72-year-old woman experienced intraoperative death following bypass grafting and endarterectomy of the left anterior descending coronary artery.
• Autopsy revealed a significant intramural dissection of the left anterior descending artery.

Findings:

• The dissection extended from the endarterectomy site to the left main coronary artery ostium.
• Clotting occurred in the false lumen of the dissection and within the bypass graft.
• A myocardial infarct was present, directly linked to the dissection and clotting.

Implications:

• Intramural dissection is a critical, potentially fatal complication of coronary revascularization procedures.
• Understanding the mechanism of dissection, false lumen thrombosis, and graft failure is crucial for surgical technique refinement.
• This case highlights the importance of recognizing and managing iatrogenic arterial dissections in cardiovascular surgery.