isolated working hearts obtained from these two groups were subjected to a 40 % reduction in coronary flow in the presence of a maintained metabolic demand ( hearts were paced at 200 beats/min and perfused at an 80 mmhg ( 1 mmhg = 133.3 pa ) left aortic afterload , 11.5 mmhg left atrial preload ) .
C0018787
hearts
C0018792
atrial