system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
AV nodal delay is:
assistant
The correct answer is  Velocity of impulses at different parts of conductive system:

Atrial muscle fibers : 0.3 meter/second
Internodal fibers : 1.0 meter/second
AV node : 0.05 meter/second
Bundle of His : 0.12 meter/second
Purkinje fibers : 4.0 meter/second
Ventricular muscle fibers : 0.5 meter/second

Thus, the velocity of impulses is maximum in Purkinje fibers and minimum at AV node.