RT Journal Article SR Electronic T1 Fractional flow reserve: a review JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 949 OP 959 DO 10.1136/hrt.2007.122838 VO 94 IS 7 A1 B De Bruyne A1 J Sarma YR 2008 UL http://heart.bmj.com/content/94/7/949.abstract AB