group 2 hearts demonstrated impaired subendocardial blood flow after 5 minutes of reflow ( 0.75 +/- 0.06 vs 0.96 +/- 0.04 , endocardial/epicardial flow rates , group 2 vs group 1 ) and persistent elevation of intramyocardial carbon dioxide ( co2 ) tension ( 68 +/- 4 vs 51 +/- 4 mm hg , group 2 vs group 1 ) .
C0018787
hearts
C0014124
endocardial