Which of the Following Statements Correctly Describes the Conduction Defect

Multiple Choice

Which of the following statements correctly describes the conduction defect that causes third-degree AV block?

A) Delay in conduction of impulses from the SA node to AV node
B) Conduction defect in the AV node itself
C) Intermittent failure of conduction of impulses below the AV node
D) Complete dissociation of impulses between atria and ventricles