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Author Question: In 2:1 AV block, _____. a. the atrial rhythm (P-P interval) is regular b. the ventricular rhythm ... (Read 147 times)

student77

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on: Jun 25, 2018
In 2:1 AV block, _____.
 
  a. the atrial rhythm (P-P interval) is regular
  b. the ventricular rhythm (R-R interval) is irregular
  c. the PR interval lengthens until a P wave appears with no QRS complex
  d. there is no PR interval because the atria and ventricles beat independently of each other

Question 2

The thick, muscular middle layer of the heart wall that contains the atrial and ventricular muscle fibers necessary for contraction is the __________.
 
  Fill in the blanks with correct word


AaaA

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Reply #1 on: Jun 25, 2018
Answer to Question 1

A
Second-degree 2:1 AV block is characterized by P waves that are normal in size and shape, but every other P wave is not followed by a QRS. The atrial rate is twice the ventricular rate.

Answer to Question 2

myocardium


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