Left Subclavian Artery Revascularization in Preparation for Coronary Artery Bypass Grafting
Saum A Rahimi1, Noor Shah, Volodymyr Labinskyy
1Rutgers-Robert Wood Johnson Medical School, New Brunswick, N.J., USA.
Insights
Coronary subclavian steal syndrome, a rare complication after bypass surgery, occurs when a blocked subclavian artery causes reversed blood flow. Surgical management of this condition is crucial for patients with coronary and peripheral artery disease.
Area of Science:
- Cardiovascular Surgery
- Vascular Surgery
- Interventional Cardiology
Background:
- Coronary subclavian steal syndrome (CSSS) is a rare complication following left internal mammary artery (LIMA) to coronary artery bypass grafting (CABG) in patients with a stenotic or occluded left subclavian artery.
- The condition arises from reversed blood flow in the LIMA graft, diverting oxygenated blood away from the myocardium to the upper extremity.
Observation:
- This case involves a patient with triple-vessel coronary artery disease and peripheral arterial disease, including a critical left subclavian artery occlusion.
- The patient presented with poor exercise tolerance, highlighting the functional impact of combined coronary and peripheral vascular disease.
Findings:
- The study presents the surgical management of a complex case involving coronary subclavian steal syndrome.
- Successful surgical intervention was performed to address the underlying left subclavian artery stenosis and manage the coronary artery disease.
Implications:
- Preoperative identification and management of subclavian artery disease are essential to prevent CSSS.
- Alternative surgical strategies, such as subclavian artery revascularization before CABG or using different graft conduits, are important considerations.
- This case underscores the importance of a comprehensive vascular assessment in patients undergoing cardiac surgery.
Abstract:
Coronary subclavian steal syndrome is a rare but important condition that occurs after a left internal mammary artery (LIMA) to coronary artery bypass in the setting of a stenotic left subclavian artery. The lack of blood flow through the subclavian artery causes the reversal of flow in the LIMA so that it essentially steals blood from the myocardium. In order to avoid this complication, many surgeons now opt to either revascularize the stenotic subclavian artery prior to coronary artery bypass grafting or to use an alternate vessel as the bypass graft. Here, we present the case of an asymptomatic patient with poor exercise tolerance who was recently diagnosed with both triple-vessel coronary disease and peripheral arterial disease, which was most notably characterized by occlusion of the left subclavian artery. This case demonstrates the surgical management of this complex clinical entity.
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