Question 1

Generally speaking,what is the normal duration of a QT interval?

Accepted Answer

The duration of the QT interva...

Question 2

In the heart's conduction system,the _____ receive(s) an electrical impulse from the right and left bundle branches and relay(s) it to the ventricular myocardium.

Accepted Answer

A)   AV node
B)   SA node
C)   Purkinje fibers
D)   atrial pacemaker cellsE) All of the above
F) A) and B) C

Question 3

How do you determine whether the atrial rhythm on an ECG tracing is regular or irregular?

Accepted Answer

A)   Compare QT intervals.
B)   Compare PR intervals.
C)   Compare R to R intervals.
D)   Compare P to P intervals.E) A) and B)
F) All of the above

Question 4

MATCHING
-The a in aVR,aVL,and aVF

Accepted Answer

A)  Electrolyte
B)  Voltmeter
C)  Chemical
D)  Ectopic
E)  Reciprocal changesF) AtrialG) Indicative changesH) AmplitudeI) RepolarizationJ) SupranormalK) VentricularL) ReentryM) PositiveN) AugmentedO) A) and E)
P) F) and J)

Question 5

The absolute refractory period begins with the onset of the _____ and terminates _____.

Accepted Answer

A)   P wave; with the end of the QRS complex
B)   QRS complex; at approximately the apex of the T wave
C)   QRS complex; with the end of the T wave
D)   P wave; with the beginning of the QRS complexE) All of the above
F) A) and B)

Question 6

The portion of the ECG tracing between the QRS complex and the T wave is called the ____.

Accepted Answer

A)   PR segment
B)   ST segment
C)   TP segment
D)   QT intervalE) All of the above
F) C) and D)

Question 7

MATCHING
-The stimulus that alters the electrical charges across the cell membrane may be electrical,mechanical,or _____.

Accepted Answer

A)  Electrolyte
B)  Voltmeter
C)  Chemical
D)  Ectopic
E)  Reciprocal changesF) AtrialG) Indicative changesH) AmplitudeI) RepolarizationJ) SupranormalK) VentricularL) ReentryM) PositiveN) AugmentedO) G) and I)
P) J) and L)

Question 8

Which part of the conduction system receives an impulse from the bundle of His and relays it to the Purkinje fibers?

Accepted Answer

A)   SA node
B)   AV node
C)   Right and left atria
D)   Right and left bundle branchesE) None of the above
F) A) and B)

Question 9

List four major electrolytes that influence cardiac function.

Accepted Answer

Sodium,pot...

Question 10

Complete the following chart:
 $$\begin{array} { l l l l } 
\text { Lead } & \text { Positive Electrode } & \text { Negative Electrode } &\text { Heart Surface Viewed } \
\text { Lead I } & & \
\text { Lead II } & & & \
\text { Lead III } & &
\end{array}$$

Accepted Answer

\[\begin{array} { | l | l | l | l }
\hl...

Question 11

On an ECG,what is the first negative deflection seen after the P wave?

Accepted Answer

A)   Q wave
B)   R wave
C)   S wave
D)   T waveE) None of the above
F) A) and B)

Question 12

Depolarization is the same as contraction.

Accepted Answer

A) True 
 B)False

Question 13

Is depolarization the same as contraction? Explain your answer.

Accepted Answer

Depolarization is not the same as contra...

Question 14

On the ECG,the T wave represents _____.

Accepted Answer

A)   atrial contraction
B)   atrial repolarization
C)   ventricular contraction
D)   ventricular repolarizationE) None of the above
F) A) and B) D

Question 15

When the cardiac muscle cell is stimulated,the cell is said to _____.

Accepted Answer

A)   polarize
B)   recover
C)   depolarize
D)   repolarizeE) A) and D)
F) None of the above

Question 16

MATCHING
-Impulse(s) originating from a source other than the SA node

Accepted Answer

A)  Electrolyte
B)  Voltmeter
C)  Chemical
D)  Ectopic
E)  Reciprocal changesF) AtrialG) Indicative changesH) AmplitudeI) RepolarizationJ) SupranormalK) VentricularL) ReentryM) PositiveN) AugmentedO) G) and N)
P) A) and B)

Question 17

Which of the following is the first positive deflection seen on the ECG after the P wave?

Accepted Answer

A)   Q wave
B)   R wave
C)   S wave
D)   T waveE) B) and D)
F) C) and D)

Question 18

MATCHING
-The T wave represents ventricular _____.

Accepted Answer

A)  Electrolyte
B)  Voltmeter
C)  Chemical
D)  Ectopic
E)  Reciprocal changesF) AtrialG) Indicative changesH) AmplitudeI) RepolarizationJ) SupranormalK) VentricularL) ReentryM) PositiveN) AugmentedO) E) and L)
P) I) and M) I

Question 19

If the wave of depolarization (electrical impulse)moves toward the positive electrode,the waveform recorded on ECG graph paper will be upright (positive deflection).

Accepted Answer

A) True 
 B)False

Question 20

The cells of the heart that contain contractile filaments are called _____ cells.

Accepted Answer

The answer of The cells of the heart that contain...

Exam 2: Basic Electrophysiology

Generally speaking,what is the normal duration of a QT interval?

Correct AnswerverifiedThe duration of the QT interva...View AnswerShow Answer

In the heart's conduction system,the _____ receive(s) an electrical impulse from the right and left bundle branches and relay(s) it to the ventricular myocardium.

Correct AnswerverifiedC

How do you determine whether the atrial rhythm on an ECG tracing is regular or irregular?

Correct AnswerverifiedShow Answer

MATCHING -The a in aVR,aVL,and aVF

Correct AnswerverifiedShow Answer

The absolute refractory period begins with the onset of the _____ and terminates _____.

Correct AnswerverifiedShow Answer

The portion of the ECG tracing between the QRS complex and the T wave is called the ____.

Correct AnswerverifiedShow Answer

MATCHING -The stimulus that alters the electrical charges across the cell membrane may be electrical,mechanical,or _____.

Correct AnswerverifiedShow Answer

Which part of the conduction system receives an impulse from the bundle of His and relays it to the Purkinje fibers?

Correct AnswerverifiedShow Answer

List four major electrolytes that influence cardiac function.

Correct AnswerverifiedSodium,pot...View AnswerShow Answer

Correct Answerverified\[\begin{array} { | l | l | l | l } \hl...View AnswerShow Answer

On an ECG,what is the first negative deflection seen after the P wave?

Correct AnswerverifiedShow Answer

Depolarization is the same as contraction.

Correct AnswerverifiedShow Answer

Is depolarization the same as contraction? Explain your answer.

Correct AnswerverifiedDepolarization is not the same as contra...View AnswerShow Answer

On the ECG,the T wave represents _____.

Correct AnswerverifiedD

When the cardiac muscle cell is stimulated,the cell is said to _____.

Correct AnswerverifiedShow Answer

MATCHING -Impulse(s) originating from a source other than the SA node

Correct AnswerverifiedShow Answer

Which of the following is the first positive deflection seen on the ECG after the P wave?

Correct AnswerverifiedShow Answer

MATCHING -The T wave represents ventricular _____.

Correct AnswerverifiedI

If the wave of depolarization (electrical impulse)moves toward the positive electrode,the waveform recorded on ECG graph paper will be upright (positive deflection).

Correct AnswerverifiedShow Answer

The cells of the heart that contain contractile filaments are called _____ cells.

Correct AnswerverifiedShow Answer

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The duration of the QT interva...
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The absolute refractory period begins with the onset of the _ and terminates _.

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Sodium,pot...
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Depolarization is not the same as contra...
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