Table 1.

Division of dog groups and MR-derived hyperemic OEF data (rest OEF assumed = 0.6).

Group (n)	Hyperemia	LAD Stenosis	DIR OEF		DW OEF
			Global		Global
Control Dogs
Group 1 (7)	DIP	0%	0.29 ± 0.11		0.32 ± 0.09
			DIR OEF		DW OEF
			LAD	LCx	LAD	LCx
LAD Stenotic Dogs
Group 2 (3)	DOB	50%	0.60 ± 0.06	0.66 ± 0.12	0.61 ± 0.02	0.68 ± 0.15
Group 3 (7)	DOB	70-90%	0.56 ± 0.10	0.52 ± 0.13	0.75 ± 0.08†*	0.60 ± 0.11

DIP, dipyridamole; DOB, dobutamine; LAD, left anterior descending; LCx, left circumflex.

^*P < 0.05 between LAD and LCx or between Group 2 and Group 3.

^†P < 0.01 between DIR and DW methods.