no significant correlation was found between the percentage systolic blood pressure fall and the following parameters determined before therapy : systolic blood pressure and its variability , heart rate ( at rest and after stimulation by exercise or isoproterenol ) , cardiac output and total peripheral resistance , renin concentration ( at rest and after stimulation ) and urinary excretion of catecholamines and derivates .
C0022245
isoproterenol
C0007412
catecholamines