The effects of a new beta-adrenoceptor blocking compound, tolamolol, on haemo-dynamics and myocardial function in man.
1 The effects of tolamolol on haemodynamics and myocardial contractility were investigated in two groups of six patients undergoing diagnostic cardiac catheterization.2 The intravenous administration of tolamolol (0.15 mg/kg) produced a significant fall in heart rate from a control value (87 +/- 7 to 62 +/- 3 beats/min) 5 min after administration and a concomitant fall in cardiac output from 4.7 +/- 0.9 to 3.5 +/- 0.8 litres/minute. There was no significant change in systemic blood pressure, pulmonary artery blood pressure or stroke volume.3 There was no change in left ventricular end diastolic pressure after tolamolol. There was a fall in the maximum rate of rise of the left ventricular pressure (LV dp/dt(max)) and the derived index of the left ventricular contractile state (V(max)).4 These results suggest that tolamolol has a predominantly negative chronotropic but also a lesser negative inotropic action on the heart.
D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage / Q000494:pharmacology*; D000328:Adult; D001549:Benzamides / Q000008:administration & dosage / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects; D006328:Cardiac Catheterization; D002302:Cardiac Output / Q000187:drug effects; D003408:Cresols / Q000008:administration & dosage / Q000494:pharmacology; D006321:Heart / Q000502:physiology*; D006331:Heart Diseases / Q000503:physiopathology; D006334:Heart Function Tests; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D007275:Injections, Intravenous; D008875:Middle Aged; D011412:Propanolamines / Q000008:administration & dosage / Q000494:pharmacology*
D000319:Adrenergic beta-Antagonists; D001549:Benzamides; D003408:Cresols; D011412:Propanolamines