Coronary artery surgery using inverted internal mammary artery

Area of Science:

• Cardiovascular Surgery
• Interventional Cardiology
• Vascular Biology

Background:

• Coronary artery bypass grafting (CABG) is a standard treatment for severe coronary artery disease.
• Graft availability, particularly suitable vein grafts, can be a limiting factor in complex CABG procedures.
• Alternative revascularization strategies are crucial for patients with limited conduit options.

Observation:

• A 56-year-old male patient required multiple CABG but had insufficient suitable vein grafts.
• The surgical team employed a retrograde flow technique utilizing the right internal mammary artery (RIMA) to perfuse the posterior descending coronary artery (PDCA).
• This innovative approach aimed to overcome the limitations of traditional graft supply.

Findings:

• The retrograde RIMA to PDCA bypass was successfully performed.
• Post-operative assessment using thallium-201 scans showed relief of angina symptoms.
• The scans also indicated the resolution of previously non-ischaemic areas, suggesting successful myocardial perfusion.
• This supports the efficacy of the retrograde RIMA technique in this specific clinical scenario.

Implications:

• The retrograde RIMA technique presents a valuable alternative for coronary revascularization in patients with inadequate vein graft availability.
• This method can potentially improve outcomes and expand treatment options for complex coronary artery disease.
• Further research and clinical application of this technique are warranted to establish its broader utility in cardiovascular surgery.