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Author Question: Which of the following leads should be used to view the right ventricle? a. V3 b. V7 c. V4R d. ... (Read 32 times)

krzymel

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on: Jun 25, 2018
Which of the following leads should be used to view the right ventricle?
 
  a. V3
  b. V7
  c. V4R
  d. V6

Question 2

The period during the cardiac cycle when cells cannot respond to a stimulus, no matter how strong, is called the _____ period.
 
  a. depolarized
  b. supranormal
  c. relative refractory
  d. absolute refractory


Loise Hard

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

C
Leads V1R to V6R are used to view the right ventricle.

Answer to Question 2

D
During the absolute refractory period, the cell will not respond to further stimulation. This means that the myocardial working cells cannot contract and the cells of the electrical conduction system cannot conduct an electrical impulseno matter how strong the stimulus. As a result, tetanic (sustained) contractions cannot be provoked in cardiac muscle. On the ECG, the absolute refractory period corresponds with the onset of the QRS complex to the peak of the T wave.


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