to test directly if veratridine 's positive inotropic effect initiates the bezold reflex , verapamil , which blocks the slow ca ( 2+ ) channels of myocardial cells but leaves intracardiac nerves unaffected , was injected by the intracoronary route to prevent the increased contractility from intracoronary injection of veratridine which also abolished the reflex hypotension , demonstrating conclusively that increasing myocardial contractility and thereby activating lv mechanoreceptors but not chemoreceptors initiates the bezold reflex .
C0225828
myocardial cells
C0027061
myocardial