REFLEX CONTROL OF THE HEART IN COMPLETE A-V BLOCK, WITH SPECIAL REFERENCE TO THE EXPERIMENTAL CREATION OF ADAMS-STOKES DISEASE.

摘要: Abstract The cardiac sympathetics and parasympathetics were directly reflexly activated in dogs having complete heart block. Activation of the vagus produced a very slight decrease ventricular rate blood pressure. had no direct effect upon ventricles. It was concluded that vagal fibers may supply bundle His its branches but not muscle. Contrasted to almost negligible effects striking positive inotropic chronotropic stimulation sympathetics. carotid sinus (carotid hypertension) induced negative effect. This mediated by reflex inhibition sympathetics, played role. ventricle A-V block is primarily under control Ventricular asystole with activation cessation pacemaking. Similar mechanisms nay be active production Adams-Stokes attacks man.