P794Sphenopalatine ganglion block as a method to modulate cardiac autonomic tone and suppress premature ventricular beats. (19th March 2018) - Katsaras, D; Arvaniti, C; Flevari, P; Giannopoulos, G; Batistaki, C; Stasinos, V; Kostopanagiotou, G; Deftereos, S; Iliodromitis, E; Leftheriotis, D