Despite comparable size of area at risk ( AAR ) ( 38 12 vs. 38 13 % of the LV circumference , respectively , P = 0.89 ) and similar time from onset to intervention ( 249 148 vs. 263 209 min , respectively , P = 0.93 ) in the two groups , PostC did not significantly reduce cardiac magnetic resonance infarct size ( 23 17 and 21 18 g in the treated vs. control group , respectively , P = 0.64 ) .