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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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jyxynvaea jyxynvaea
wrote...
Posts: 579
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6 years ago
Which of the following is the first positive deflection seen on the ECG after the P wave?
 
  a. Q wave
  b. R wave
  c. S wave
  d. T wave

Question 2

A(n) _____ _____ is a vertical line on the ECG that indicates the artificial pacemaker has discharged.
 
  Fill in the blanks with correct word

Question 3

The portion of the ECG tracing between the QRS complex and the T wave is called the ____.
 
  a. PR segment
  b. ST segment
  c. TP segment
  d. QT interval

Question 4

Briefly describe parasympathetic innervation of the heart.
 
  What will be an ideal response?
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Replies
wrote...
#1
6 years ago
The answer to question 1  B
If the QRS complex consists entirely of a positive waveform, it is called an R wave. If the complex consists entirely of a negative waveform, it is called a QS wave.

The answer to question 2  pacemaker spike

The answer to question 3  B
The portion of the ECG tracing between the QRS complex and the T wave is the ST segment.

The answer to question 4  Parasympathetic (inhibitory) nerve fibers supply the sinoatrial node, atrial muscle, and the atrioventricular junction of the heart by the vagus nerves.
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