Minimally invasive direct coronary artery bypass as a primary strategy for reoperative myocardial revascularization
Lognathen Balacumaraswami1, Nirav C Patel, Hagen Gorki
1From the Department of Cardiothoracic Surgery, Lenox Hill Hospital, New York, New York USA.
Insights
Reoperative minimally invasive direct coronary artery bypass (MIDCAB) surgery offers excellent early outcomes equivalent to primary MIDCAB. This sternal-sparing approach avoids risks associated with conventional reoperative bypass grafting.
Area of Science:
- Cardiovascular Surgery
- Minimally Invasive Cardiac Surgery
- Coronary Artery Bypass Grafting
Background:
- Conventional reoperative coronary artery bypass grafting carries risks like sternal re-entry complications, patent graft injury, and embolization.
- Sternal sparing minimally invasive direct coronary artery bypass (MIDCAB) is a viable alternative when technically feasible, avoiding these specific risks.
Purpose of the Study:
- To evaluate the in-hospital outcomes of reoperative minimally invasive direct coronary artery bypass (MIDCAB) surgery.
- To compare outcomes between reoperative MIDCAB and primary MIDCAB procedures.
Main Methods:
- Prospective standardized data from 369 reoperative MIDCAB cases (1996-2006) were analyzed.
- Comparison was made with 822 primary MIDCAB patients during the same period.
- Preoperative risk profiles and postoperative in-hospital outcomes, including length of stay, were compared.
Main Results:
- Reoperative patients exhibited a significantly higher preoperative risk profile (P < 0.001) including stroke, cerebrovascular disease, aortic calcification, renal failure, and reduced ejection fraction.
- Despite the higher risk profile, there was no significant difference in in-hospital outcomes between reoperative and primary MIDCAB groups.
- Length of hospital stay was also comparable between the two groups.
Conclusions:
- Reoperative MIDCAB provides effective, targeted coronary revascularization while circumventing sternal re-entry hazards.
- This approach avoids graft injury and manipulation, as well as the adverse effects of cardiopulmonary bypass.
- Reoperative MIDCAB facilitates faster recovery and yields early outcomes comparable to primary MIDCAB procedures.
Objective:
: Conventional reoperative coronary artery bypass grafting is associated with risk of sternal re-entry, injury to patent grafts, and embolization from diseased grafts. Sternal sparing minimally invasive direct coronary artery bypass (MIDCAB) avoids such risks in cases where it is technically feasible. We sought to examine in-hospital outcomes of reoperative MIDCAB surgery.
Methods:
: We recorded prospective standardized data from the New York Cardiac Surgical Reporting System database of 369 reoperative MIDCAB cases from 1996 to 2006 and compared with 822 primary MIDCAB patients in the same time period. We compared the preoperative risk profile and postoperative in-hospital outcomes and length of stay for both groups.
Results:
: There was a significantly higher risk profile typical of the reoperative patient population (P < 0.001 for stroke, peripheral/cerebrovascular disease, extensive aortic calcification, renal failure, and left ventricular ejection fraction <40%) compared with the primary MIDCAB group. Despite this fact, there was no difference in the in-hospital outcomes and length of hospital stay between the two groups.
Conclusions:
: Reoperative MIDCAB provides targeted coronary revascularization and avoids hazards of sternal re-entry, graft injury and manipulation, and deleterious effects of cardiopulmonary bypass. This hastens recovery and provides excellent early outcomes equivalent to primary MIDCAB procedures.
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