The increase in coronary arterial diameter with 10 % FIO2 occurred only in normal segments ( 2.74 + / - 0.64 vs. 2.97 + / - 0.64 mm ; p < 0.001 ) , but not in diseased segments ( 2.34 + / - 0.57 vs. 2.38 + / - 0.55 mm ; not significant ) .
