Question 1

The __________ is a combination of all of the electric events that occur in the heart during a single heartbeat.

Accepted Answer

cardiac cycle
The cardiac cycl

Question 2

Sinus arrhythmia is a result of the abnormal flow of the electrical system of the heart.

Accepted Answer

A) True 
 B)False

Question 3

In the case of __________, the patient has general malaise and muscle cramps. The condition may occur if diuretics are used without potassium supplementation.

Accepted Answer

hypokalemia
In the case of hyp

Question 4

Atrial flutter may occur if

Accepted Answer

A)  the electrical charge does not pass out of the SA node. 
B)  the ventricles contract repeatedly. 
C)  ectopic atrial beats occur. 
D)  the patient consumes too much caffeine. 
A)  the electrical charge does not pass out of the SA node. 
B)  the ventricles contract repeatedly. 
C)  ectopic atrial beats occur. 
D)  the patient consumes too much caffeine.

Question 5

The QRS complex shows the contraction of both __________ and also reflects the completion of cardiac depolarization.

Accepted Answer

ventricles
The QRS complex sho

Question 6

Polarization is the same thing as myocardial contraction.

Accepted Answer

A) True 
 B)False

Question 7

The right leg is used to ground the recording of the augmented leads.

Accepted Answer

A) True 
 B)False

Question 8

A cardiac event monitor must be worn at all times, even during bathing, to detect cardiac abnormalities.

Accepted Answer

A) True 
 B)False

Question 9

Six-channel ECG strips must be cut and mounted before they are placed in the patient's medical record.

Accepted Answer

A) True 
 B)False

Question 10

PACs may be recorded in patients who smoke or consume large quantities of caffeine.

Accepted Answer

A) True 
 B)False

Question 11

The electrocardiograph records both the intensity of and the actual time required for each part of the cardiac cycle.

Accepted Answer

A) True 
 B)False

Question 12

The patient must be placed in the supine position for an ECG, even if the person has the symptoms of dyspnea and orthopnea.

Accepted Answer

A) True 
 B)False

Question 13

The most distal portions of the electrical system of the myocardium are the __________.

Accepted Answer

Purkinje fibers
The most dista

Question 14

If the ECG recording appears as a series of irregular, jagged peaks, the medical assistant should

Accepted Answer

A)  check for nearby electric appliances. 
B)  make sure all electrodes are in contact with the skin. 
C)  help the patient relax and stay warm. 
D)  check the cable connections to the electrodes. 
A)  check for nearby electric appliances. 
B)  make sure all electrodes are in contact with the skin. 
C)  help the patient relax and stay warm. 
D)  check the cable connections to the electrodes.

Question 15

Which of the following is seen on the ECG strip of a patient with an MI?

Accepted Answer

A)  Elevated ST segments 
B)  Elevated T waves 
C)  Extended QRST segments 
D)  Absent T wave 
A)  Elevated ST segments 
B)  Elevated T waves 
C)  Extended QRST segments 
D)  Absent T wave

Question 16

On an ECG recording, five 5-mm boxes are seen between the R waves. What is the patient's heart rate per minute?

Accepted Answer

A)  60 
B)  65 
C)  70 
D)  80 
A)  60 
B)  65 
C)  70 
D)  80

Question 17

What information should be documented on the ECG strip?

Accepted Answer

The ECG strip should have the patient's

Question 18

An implanted ICD monitors the heart rhythm and automatically performs __________ if it detects a dangerous tachycardia or fibrillation.

Accepted Answer

cardioversion
An implanted ICD

Question 19

The _________ reflects the time between the end of ventricular contraction and the beginning of ventricular recovery.

Accepted Answer

A)  U wave 
B)  QRS complex 
C)  ST segment 
D)  QT interval 
A)  U wave 
B)  QRS complex 
C)  ST segment 
D)  QT interval

Question 20

During the diastole cardiac cycle, which of the following occur?

Accepted Answer

A)  Atria contract and empty of blood 
B)  Ventricles contract and empty of blood 
C)  The chambers refill with blood 
D)  Both A and B 
E)  All of the above 
A)  Atria contract and empty of blood 
B)  Ventricles contract and empty of blood 
C)  The chambers refill with blood 
D)  Both A and B 
E)  All of the above

Exam 42: Principles of Electrocardiography

The __________ is a combination of all of the electric events that occur in the heart during a single heartbeat.

Sinus arrhythmia is a result of the abnormal flow of the electrical system of the heart.

In the case of __________, the patient has general malaise and muscle cramps. The condition may occur if diuretics are used without potassium supplementation.

Atrial flutter may occur if

The QRS complex shows the contraction of both __________ and also reflects the completion of cardiac depolarization.

Polarization is the same thing as myocardial contraction.

The right leg is used to ground the recording of the augmented leads.

A cardiac event monitor must be worn at all times, even during bathing, to detect cardiac abnormalities.

Six-channel ECG strips must be cut and mounted before they are placed in the patient's medical record.

PACs may be recorded in patients who smoke or consume large quantities of caffeine.

The electrocardiograph records both the intensity of and the actual time required for each part of the cardiac cycle.

The patient must be placed in the supine position for an ECG, even if the person has the symptoms of dyspnea and orthopnea.

The most distal portions of the electrical system of the myocardium are the __________.

If the ECG recording appears as a series of irregular, jagged peaks, the medical assistant should

Which of the following is seen on the ECG strip of a patient with an MI?

On an ECG recording, five 5-mm boxes are seen between the R waves. What is the patient's heart rate per minute?

What information should be documented on the ECG strip?

An implanted ICD monitors the heart rhythm and automatically performs __________ if it detects a dangerous tachycardia or fibrillation.

The _________ reflects the time between the end of ventricular contraction and the beginning of ventricular recovery.

During the diastole cardiac cycle, which of the following occur?

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