Question

On an EKG, AV Nodal Block is indicated by: A. inverted P-wave B. flat T-wave C....

On an EKG, AV Nodal Block is indicated by:

A. inverted P-wave

B. flat T-wave

C. prolonged PR-Interval

D. enlarged R-wave

E. inverted QRS wave

Science   Anatomy-And-Physiology   
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Answer #1

Answer

Option C) Prolonged PR interval

  • PR interval is the distance between P and R waves in the electrocardiogram.
  • PR interval indicates the time taken for an elecrical impulse to travel from SA node to the AV node (Interval between atrial depolarization and beginning of the ventricular depolarization).
  • As AV node is a relay center to trasmit impulses from atria to ventricles, if PR interval is delayed for more than 0.20 second, it indicated AV Nodal Block.
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