isolated isovolumic ( balloon-in-lv ) blood perfused rabbit hearts were paced at constant physiological heart rate ( 4 hz ) , given either no drug ( controls , n = 7 ) , isoproterenol ( n = 7 ) , or ouabain ( n = 7 ) , and then subjected to 6 minutes of low flow ischemia ( 75 % reduction of baseline coronary flow ) .
C0225897
lv
C0018787
hearts