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[Surgical treatment of coronary artery disease]
1Department of Thoracic and Cardiovascular Surgery, Juntendo University School of Medicine.
Insights
Determining the best treatment for coronary artery disease is complex due to varied patient anatomy and risk factors. Advances in coronary artery bypass graft (CABG) surgery and percutaneous transluminal coronary angioplasty (PTCA) further complicate surgical indications.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
- Clinical Decision Making
Context:
- Coronary artery disease (CAD) presents with diverse anatomical manifestations across three major coronary arteries.
- Patient-specific variables and risk factors further complicate treatment decisions beyond simple classifications (single, double, triple vessel disease).
- The evolution of revascularization techniques, including coronary artery bypass graft (CABG) surgery and percutaneous transluminal coronary angioplasty (PTCA), has influenced treatment indications.
Purpose:
- To discuss the complex indications for revascularization surgery in patients with coronary artery disease.
- To review the historical development and comparative benefits of CABG and PTCA.
- To highlight the challenges in conducting large-scale randomized studies comparing PTCA and CABG.
Summary:
- The complexity of coronary artery disease (CAD) indications for revascularization surgery stems from the myriad anatomical variations and patient-specific factors.
- Advancements in CABG surgery, including improved conduits like the internal mammary artery, have enhanced outcomes over two decades.
- The advent of PTCA has introduced a new treatment modality, necessitating comparative studies with CABG, though such research faces significant challenges.
Impact:
- Understanding the nuances of CAD presentation and treatment options is crucial for optimizing patient care.
- The ongoing development of revascularization techniques requires continuous evaluation of their comparative efficacy and safety.
- This paper provides insights into the historical context and challenges in defining optimal surgical indications for CAD, referencing established guidelines.
Abstract:
The indication in revascularization surgery is quite complicated, as the manifestation of the anatomical disease in the major three coronary arterial trees are innumerable and different as the face of each patient. Even though it is simply grouped into three categories as single, double and triple vessel disease, the combination of the degree and position of the obstructive lesions and the status of left ventricular function is varied in each instance. Adding further the patient's specific variables and risk factors to the anatomical variance, the situation becomes more complex. During the first decade of revascularization surgery, several large scale clinical studies were carried out in the United States and Europe to define the subsets of patients who were more benefited by revascularization surgery than medical treatment. The technique of aorto-coronary bypass graft (CABG) surgery also rapidly developed during this period and more complete revascularization using more durable conduits such as the internal mammary artery grafts with less surgical morbidity and mortality has been attained in the second decade. The appearance of PTCA (percutaneous transluminal coronary angioplasty) as a new invasive modality of treatment by the cardiologist towards the end of 1970's further complicated the indication of CABG. The comparative benefit of PTCA & CABG should be searched by the objective prospective randomized studies but such studies may be very difficult to be conducted in large scale, and meantime the number of PTCA will continue to increase. Based on the ACC/AHA Task Force Report, "Guideline and Indication for Coronary Artery Bypass Graft Surgery.": JACC Vol. 17, No. 3 March 1, 1991: 543-89, some of the subjects in surgical treatment of coronary artery disease were discussed in this paper.