in canine experiments with recording intraventricular pressure and its first derivative , with electromagnetic flowmetry and thermodilution it has been demonstrated that controlled phentolamine-induced alpha-adrenergic block results in an increase of the cardiac output , heart rate , myocardial contractility index , and , at the same time , in a reduction of the total vascular resistance , arterial pressure , intraventricular pressure and heart work .
C0027061
myocardial
C0018787
heart