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Author Question: What is implied by an abnormally prolonged PR interval? a. Atrioventricular block b. ... (Read 127 times)

rachel9

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on: Jul 16, 2018
What is implied by an abnormally prolonged PR interval?
 
  a. Atrioventricular block
  b. Bundle-branch block
  c. Myocardial infarction
  d. Valvular detachment

Question 2

What is the normal period of time for the PR interval?
 
  a. Not longer than 0.20 sec
  b. Not longer than 0.30 sec
  c. Not longer than 0.45 sec
  d. Not longer than 0.50 sec


Anonymous

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
PR intervals longer than 0.20 sec suggest that the impulse is abnormally delayed at the AV node and a block is present.

Answer to Question 2

ANS: A
Normally, the PR interval represents a period no longer than 0.20 sec.


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