individuals needing reoperation tended to be young ( p less than 0.0001 ) and female ( p less than 0.002 ) and to have less extensive coronary artery disease ( p less than or equal to 0.0001 ) , less left ventricular impairment ( p less than 0.0001 ) , less evidence of congestive heart failure ( p = 0.006 ) , and fewer coronary vessel systems bypassed at the first operation ( p less than 0.0001 ) .
C0010054
coronary artery disease
C0489903
vessel systems