Iatrogenic left main coronary artery stenosis

Area of Science:

• Cardiovascular Surgery
• Interventional Cardiology
• Cardiac Surgery Complications

Background:

• Iatrogenic left main coronary artery stenosis is a rare but serious complication following cardiac valve replacement.
• Perfusion cannula injury during surgery is the primary cause of this stenosis.
• Early recognition and intervention are critical for patient survival.

Observation:

• Three patients developed severe left main coronary artery stenosis post-valve replacement surgery.
• All patients had previously normal coronary arteries before the procedure.
• Presenting symptoms included rapidly worsening angina and intractable ventricular arrhythmias.

Findings:

• Coronary angiography confirmed severe stenosis in the left main coronary artery in all three cases.
• The stenosis was directly linked to the preceding cardiac valve surgery.
• All patients underwent successful coronary artery bypass grafting.

Implications:

• This case series highlights the importance of considering iatrogenic left main coronary artery stenosis in patients with new-onset angina or arrhythmias after valve surgery.
• Prompt diagnosis through repeat coronary angiography is essential.
• Early surgical revascularization via coronary artery bypass grafting offers a successful treatment strategy.