Maximum Conducting velocity is of?: (A) Purkinje fibers, (B) Bundle of His, (C) SA Node, (D) AV bundle
Answer is A. Ans. a (Purkinje fibers). (Ref. Ganong, Physiology, 21st ed., Table 28-1)CONDUCTION SPEEDS IN CARDIAC TISSUETissueConduction Rate (m/s)SA node0.05Atrial pathways1AV node0.05Bundle of His1Purkinje system4Ventricular muscles1