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Limited-access coronary artery bypass grafting. The Texas Heart Institute experience
N G Talwalkar1, D A Cooley, D A Ott
1Division of Cardiovascular Surgery, Texas Heart Institute, St. Luke's Episcopal Hospital, Houston 77030, USA.
Insights
Limited-access coronary artery bypass grafting offers benefits like smaller incisions and faster recovery. However, its use is best reserved for select high-risk patients due to potential challenges and unknown long-term outcomes.
Area of Science:
- Cardiovascular Surgery
- Minimally Invasive Cardiac Procedures
Background:
- Limited-access coronary artery bypass grafting (CABG) is increasingly performed without cardiopulmonary bypass.
- Indications for this minimally invasive approach are not well-established.
Purpose of the Study:
- To evaluate the outcomes and define indications for limited-access CABG.
- To compare limited-access CABG with conventional CABG.
Main Methods:
- Retrospective analysis of 84 patients undergoing limited-access CABG between February 1996 and June 1998.
- Patients were divided into high-risk (n=56) and low-risk (n=28) groups based on disease complexity and comorbidities.
Main Results:
- 2 perioperative deaths (2%) occurred exclusively in the high-risk group.
- Complications included myocardial infarction (2), revascularization for recurrent angina (2), and multisystem dysfunction (1).
- Limited-access CABG demonstrated advantages over conventional CABG: smaller incision, fewer arrhythmias, less blood loss, reduced inotropic support, shorter hospitalization, lower cost, and quicker recovery.
Conclusions:
- Limited-access CABG may be suitable for high-risk patients with complex disease requiring single-vessel bypass.
- Challenges exist with anastomosis in small, calcific, or intramyocardial target arteries.
- Nonselective use is not justified due to potential technical difficulties and unknown long-term results.
Abstract:
Limited-access coronary artery bypass grafting, without the aid of cardiopulmonary bypass, is being performed with increased frequency, but its indications are not well defined. To determine the outcome of, and indications for, this procedure, we analyzed our experience with limited-access coronary artery bypass grafting. Between February 1996 and June 1998, 84 patients underwent limited-access coronary artery bypass grafting at our institution. We retrospectively divided these patients into 2 groups: a high-risk group with complex disease and multiple comorbidities (n = 56), and a low-risk group with uncomplicated disease (n = 28). There were 2 perioperative deaths (2%), and both of them occurred in high-risk cases. Early and late complications included myocardial infarction (2 cases), recurrent angina necessitating revascularization (2 cases), and multisystem dysfunction (1 case). Compared with conventional bypass grafting, limited-access coronary artery bypass grafting offered a smaller skin incision, fewer arrhythmias, less blood loss, less need for inotropic drugs, shorter hospitalization, lower cost, and quicker recovery time. Limited-access coronary artery bypass grafting might have a role in treating high-risk patients who have complex disease and require single-vessel bypass. Anastomosis can be challenging, however, if the target coronary artery is small, calcific, or intramyocardial. Moreover, the long-term results are unknown. Therefore, nonselective use of limited-access coronary artery bypass grafting is unjustified.