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[Two cases of reoperative coronary bypass grafting through a small left thoracotomy]
1Division of Cardiovascular Surgery, Mitsui Memorial Hospital, Tokyo, Japan.
Insights
Minimally invasive direct coronary artery bypass (MIDCAB) reoperations can be safe and effective when focusing solely on the left anterior descending artery (LAD). This approach minimizes complications in complex cases, offering a viable option for select patients needing repeat coronary artery surgery.
Area of Science:
- Cardiovascular Surgery
- Minimally Invasive Cardiac Surgery
Background:
- Reoperations for coronary artery disease present unique challenges.
- Minimally invasive direct coronary artery bypass (MIDCAB) offers a less invasive alternative for repeat procedures.
Observation:
- Two patients underwent MIDCAB reoperation, one with prior left ventricular rupture repair and another post-coronary artery bypass grafting.
- The left internal thoracic artery was used and anastomosed to the left anterior descending artery (LAD) via a small left thoracotomy.
Findings:
- One patient required postoperative coronary angioplasty due to anastomotic stenosis but recovered fully.
- Focusing MIDCAB reoperation solely on the LAD can minimize surgical and postoperative complications, especially with expected adhesions or unavailable circumflex targets.
Implications:
- This targeted MIDCAB approach is effective for carefully selected reoperative coronary artery bypass patients.
- It provides a potentially safer strategy by avoiding complex dissection in areas like the circumflex artery.
- Careful patient selection is crucial for optimizing outcomes in MIDCAB reoperations.
Abstract:
A reoperation by a MIDCAB (minimally invasive direct coronary artery bypass) was performed on 2 patients, including one who had undergone a surgical repair of a left ventricular rupture and another who had undergone a coronary artery bypass operation. In both patients, the left internal thoracic artery was isolated by a left small thoracotomy and then was anastomosed to the LAD (left anterior descending artery). One patient showed stenosis at the site of anastomosis and thus required coronary arterioplasty postoperatively, but was discharged without any further complications. When performing a reoperation by MIDCAB, complications such as injuries to the heart and patent graft during surgery and postoperative complications can be minimized by only performing a bypass to LAD. Such a bypass is usually sufficient in cases in which either marked adhesion is expected in the area of the circumflex artery or if anastomosable branches are not available in the area of the circumflex artery. This surgical technique was found to be an effective modality for a reoperation of the coronary artery, if suitable cases are carefully selected.