it is concluded that the effect of isoprenaline in increasing myocardial blood flow is due predominantly to increased cardiac work and oxygen consumption and that practolol , since it has little direct effect on myocardial blood flow yet abolishes the cardiac stimulant and oxygen wasting effects of released catecholamines , has properties which indicate that it should be an effective and safe anti-anginal drug .
C0022245
isoprenaline
C0007412
catecholamines