[Reoperation through right thoracotomy for mitral regurgitation after coronary artery bypass grafting; report of a

Takuya Miura1, M Sakaki, T Yasuoka

  • 1Department of Cardiovascular Surgery, Kansai Rosai Hospital, Amagasaki, Japan.

Insights

This study highlights a minimally invasive approach for mitral valve replacement in patients with prior coronary artery bypass grafting (CABG). Right anterolateral thoracotomy offers a safe alternative to sternotomy, preserving bypass grafts.

Area of Science:

  • Cardiovascular Surgery
  • Cardiac Valve Repair and Replacement
  • Minimally Invasive Cardiac Surgery

Background:

  • Severe mitral regurgitation can occur years after coronary artery bypass grafting (CABG).
  • Previous CABG presents challenges for subsequent cardiac surgeries due to graft proximity and risk of injury.

Observation:

  • A 53-year-old male patient with severe mitral regurgitation post-CABG underwent mitral valve replacement.
  • Coronary arteriography confirmed all bypass grafts (left internal thoracic artery and saphenous veins) were patent.
  • Right anterolateral thoracotomy was selected over median sternotomy to minimize risk to bypass grafts.

Findings:

  • Mitral valve replacement was successfully performed via right anterolateral thoracotomy under moderate hypothermia and ventricular fibrillation, without aortic cross-clamping.
  • The patient experienced an uneventful postoperative recovery.
  • This approach demonstrated feasibility and safety in managing mitral regurgitation in a patient with prior CABG.

Implications:

  • Right anterolateral thoracotomy may be a superior surgical approach for mitral valve surgery in patients with a history of CABG.
  • This technique potentially reduces the risk of injury to coronary bypass grafts compared to traditional sternotomy.
  • Further studies are warranted to establish the long-term benefits and broader applicability of this minimally invasive strategy.

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