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Figure 3 Individual value bar graph representing coronary flow velocity (CFV) ratio at 20 µg/kg per min of dobutamine infusion (CFV ratio 20) and CFV ratio at peak stress (CFV ratio peak) for group I (development of stress-induced wall motion abnormality at intermediate dose), group II (wall motion abnormality at peak stress) and group III (normal response). Best cutoff line (dotted line) and mean value ± SD are also shown.