microspectrophotometric analysis of low dose nifedipine and control hearts showed that o2 extraction was greater in occluded than in normal myocardium ( 9.0 , s.d . = 0.9 , ml o2/100 ml blood vs 7.2 , s.d . = 0.7 , respectively ) and that subendocardial extraction exceeded subepicardial .
C0018787
hearts
C0027061
myocardium