الفهرس 
History of Coronary Artery Bypass SurgeryOnly 14 pages are availabe for public view
 |  | from | 205 |  |  |
| | | from | 205 | | |
Abstract
Direct myocardial revascularization with coronary artery
bypass grafting (CABG) has become one of the most commonly
performed operations during the past 20 years and has proved
to relieve angina in more than 85% to 90% of the patients
(Acinapura et a!., 1989). The use of saphenous vein grafts
(SVGs) was initially popularized, and it was hoped that
long-term patency and clinical relief could be achieved.
However, it has become clear since that the initial success is
jeopardized by progression of atherosclerosis in the native
circulation and , more importantly, by its development in
SVGs, as shown by serial angiographic studies (Bical et a!.,
1980 and Bourassa, 1983).
As a result, more attention has been paid to dietary and
pharmacologic control of hyperlipidemia, and the internal
thoracic artery (IT A) has became the conduit of choice for
CABG after many studies confirmed the long-term patency of
ITA compared to SVGs. Up to 5 postoperative years, there is a
10-15% difference in patency rates, with 95% of ITA grafts
patent, compared with 80-85% of vein grafts. However, more
than 5 years after the operation, the attrition rate of venous