changes in pho and the rate of fall of tension during global ischemia were compared under control conditions ( 37 degrees c , heart rate 75 beats/min ) and after exposure to the following interventions : reduced heart rate ( 36 beats/min ) , hypothermia ( 27 degrees c ) , verapamil ( 0.5 microm ) , reduced extracellular ca2+ concentration [ ( ca2+ ] o 0.5 mm ) , norepinephrine ( 0.5 microm ) in normal and catecholamine-depleted preparations , norepinephrine and reduced [ ca2+ ] o , and theophylline ( 4 mm ) .
C0428977
reduced heart
C0039771
theophylline