in guinea-pig langendorff hearts , a benzotriazinium derivative , 2-n-propyl-4-p-tolylamino-1,2,3-benzotriazinium iodide ( tnpbi ) , increased the ventricular refractory period , increased the ventricular fibrillation threshold to electrical stimulation and converted persistent ventricular fibrillation to sinus rhythm .
C0018787
hearts
C0018827
ventricular