Surgical reconstruction of the left main coronary artery with patch-angioplasty
1Department of Cardiothoracic Surgery, Philipps University Marburg, Germany. martinov@med.uni-marburg.de
Insights
Surgical reconstruction using patch-angioplasty offers a safe and effective alternative for left main coronary artery (LMCA) stenosis. This method avoids drawbacks of conventional bypass grafting and preserves native coronary flow.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
Background:
- Conventional coronary artery bypass grafting (CABG) is standard for left main coronary artery (LMCA) stenosis.
- CABG can lead to graft consumption due to competitive flow.
- Surgical reconstruction of LMCA with patch-angioplasty presents an alternative to mitigate these issues.
Purpose of the Study:
- To evaluate the safety and efficacy of surgical reconstruction with patch-angioplasty for isolated LMCA stenosis.
- To assess long-term outcomes and graft patency after LMCA patch-angioplasty.
Main Methods:
- Retrospective analysis of 37 patients with isolated LMCA stenosis undergoing surgical ostial reconstruction.
- 27 patients (73%) underwent patch-angioplasty.
- Clinical follow-up, transesophageal echocardiography (TEE), and coronary angiography were utilized.
Main Results:
- No early mortality or perioperative myocardial infarctions were observed.
- In 25 patients, TEE confirmed a widely patent left main coronary artery post-procedure.
- One-third of patients initially suspected of LMCA stenosis were found not to have it.
Conclusions:
- Surgical reconstruction with patch-angioplasty is a safe and effective treatment for proximal and middle LMCA stenosis.
- This technique preserves antegrade flow and spares arterial grafts.
- Cardio-CT may be useful in diagnosing catheter-induced coronary spasm in cases of suspected LMCA stenosis.
Background:
Conventional coronary artery bypass grafting (CABG) has been established as the treatment of choice for left main coronary artery (LMCA) stenosis However, the conventional grafting provides a retrograde perfusion to extensive myocardial area and leads prospectively to competitive flow of the non-occluded coronaries thus consuming the grafts. Surgical reconstruction of the LMCA with patch-angioplasty is an alternative method that eliminates these drawbacks.
Methods:
Between February 1997 and July 2007, 37 patients with isolated LMCA stenosis were referred for surgical ostial reconstruction. In 27 patients (73%) surgical angioplasties have been performed. All patients were followed up clinically and with transesophageal echocardiography (TEE) and coronary angiography when required.
Results:
In 10 patients (27%) a LMCA stenosis could not be confirmed. There were no early mortality or perioperative myocardial infarctions. The postoperative course was uneventful in all patients. In 25 patients, TEE demonstrated a wide open main stem flow pattern one to six months after reconstruction of the left main coronary artery with one patch mild aneurysmal dilated.
Conclusions:
The surgical reconstruction with patch-angioplasty is a safe and effective method for the treatment of proximal and middle LMCA stenosis. Almost one third of the study group had no really LMCA stenosis: antegrade flow pattern remained sustained and the arterial grafts have been spared. In the cases of unclear or suspected LMCA stenosis, cardio-CT can be performed to unmask catheter-induced coronary spasm as the underlying reason for isolated LMCA stenosis.
