down regulation of the beta adrenoceptor is thought to play an important role in the diminished response to catecholamines in heart failure . beta adrenoceptor densities were measured on membrane homogenates of rat right ventricle and lymphocytes 48 h or 7 d after experimental myocardial infarction , and in rats exposed to a continuous infusion of isoprenaline ( 400 micrograms.kg-1.h1 ) .
C0007412
catecholamines
C0022245
isoprenaline