there was no significant difference between groups i and ii with respect to volume of contrast media used per patient ( 125 +/- 35 vs. 140 +/- 45 ml ) , age ( 63.5 +/- 15 vs. 60 +/- 17 years ) , sex ( 74 % male vs. 76 % male ) , ejection fraction ( 55 % vs. 55 % ) , valvular heart disease ( 8 % vs. 9 % ) , prior coronary artery bypass graft surgery ( 5.8 % vs. 5 % ) , or extent of coronary artery disease .
C0010055
coronary artery bypass graft surgery
C0205042
coronary artery