Coronary ischemia due to subclavian stenosis after arterial revascularization

Carlo Zebele1, H Ibrahim Ozdemir, Mohamed A Soliman Hamad

  • 1Department of Cardiothoracic Surgery, Catharina Hospital, Eindhoven, The Netherlands. aasmsn@cze.nl

Insights

Coronary-subclavian steal syndrome occurred 16 years after bypass surgery due to left subclavian artery stenosis. A reoperation successfully restored blood flow, resolving coronary ischemia.

Area of Science:

  • Cardiovascular Surgery
  • Vascular Surgery
  • Interventional Cardiology

Background:

  • Coronary artery bypass grafting (CABG) using internal thoracic artery (ITA) grafts is a standard procedure.
  • Long-term complications of CABG can include graft failure or issues related to adjacent vasculature.
  • Coronary-subclavian steal syndrome (CSSS) is a rare complication affecting arterial grafts.

Observation:

  • A 60-year-old male presented with progressive ischemic symptoms 16 years post-CABG.
  • The patient had undergone CABG with bilateral in-situ internal thoracic artery grafts.
  • Angiography demonstrated patent arterial grafts but significant stenosis of the left subclavian artery.

Findings:

  • The patient exhibited symptoms consistent with coronary-subclavian steal syndrome.
  • The underlying cause was identified as subtotal stenosis of the left subclavian artery, compromising flow to the left internal thoracic artery graft.
  • Surgical intervention involved a reoperation using a vein graft to bypass the disrupted proximal left internal thoracic artery.

Implications:

  • Successful revascularization resolved the coronary ischemia, highlighting the importance of recognizing and treating CSSS.
  • This case underscores the potential for late complications even with widely patent arterial grafts.
  • Management strategies for CSSS may involve revascularization of the affected subclavian artery or bypass grafting to the compromised ITA.

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