Coronary artery bypass grafting for patients with aortoiliac occlusive disease

Area of Science:

• Cardiovascular Surgery
• Vascular Surgery
• Thoracic Surgery

Background:

• Aortoiliac occlusive disease can necessitate both lower extremity and coronary revascularization.
• The internal thoracic artery (ITA) is a common coronary artery bypass graft conduit.
• Using the ITA in patients with aortoiliac disease carries a risk of leg ischemia due to collateral flow disruption.

Purpose of the Study:

• To report on staged revascularization strategies for patients with aortoiliac occlusive disease requiring both coronary artery bypass grafting (CABG) and lower extremity revascularization.
• To evaluate the safety and efficacy of prioritizing lower extremity revascularization over CABG in specific patient populations.

Main Methods:

• Retrospective review of patients with aortoiliac occlusive disease undergoing staged revascularization.
• Analysis of clinical outcomes, including leg ischemia and graft patency.
• Comparison of outcomes based on the timing of revascularization (lower extremity first vs. CABG first).

Main Results:

• Revascularization of aortoiliac occlusion prior to CABG is feasible in stable patients with appropriate precautions.
• Patients with unstable angina and aortoiliac occlusion with ITA-dependent leg collateralization require CABG without ITA use.
• Prioritizing lower extremity revascularization can mitigate the risk of leg ischemia.

Conclusions:

• Staged revascularization is a viable approach for complex patients with aortoiliac and coronary disease.
• The decision to prioritize lower extremity or coronary revascularization should be individualized based on patient stability and collateral circulation.
• Avoiding ITA use in specific high-risk scenarios is crucial to prevent limb ischemia.