<qa>  What is the percentage increase in vessel diameter from baseline conditions to maximum vessel diameter during hyperaemiaSince changes in periphery are consistent with changes in the coronary vessels Anderson et al. 1995, FMD represent a valuable indicator for cardiac events Gokce et al. 2002, 2003; Widlansky et al. 2003. FMD is defined as percentage increase in vessel diameter from baseline conditions to maximum vessel diameter during hyperaemia de Roos et al. 2003a. 