Question 1

What condition is often associated with right-axis deviation?

Accepted Answer

A)  Cor pulmonale 
B)  Congestive heart failure (CHF) 
C)  Mitral valve prolapse 
D)  Left ventricular hypertrophy 
A)  Cor pulmonale 
B)  Congestive heart failure (CHF) 
C)  Mitral valve prolapse 
D)  Left ventricular hypertrophy

Question 2

A patient who has been diagnosed with myocardial infarction is getting an ECG. The ECG trace shows a series of nonconducted P waves followed by a P wave that is conducted to the ventricles. The ratio of nonconducted to conducted P waves is fixed at 4:1. What plan for treatment should this patient receive?
1) Rapid defibrillation
2) Atropine
3) Cardioversion
4) Pacemaker

Accepted Answer

A) 1, 2, and 3 only 
B) 2 and 4 only 
C) 3 only 
D) 1, 2, 3, and 4 
A) 1, 2, and 3 only 
B) 2 and 4 only 
C) 3 only 
D) 1, 2, 3, and 4

Question 3

While a patient is receiving an albuterol treatment, the nurse performs an ECG. The ECG shows the patient's heart rate had increased from 98 to 120 beats/min with narrow QRS complexes preceded by a P wave. What is the appropriate course of treatment for this patient?

Accepted Answer

A)  Atropine. 
B)  Activate the rapid response team. 
C)  Lidocaine. 
D)  Discontinue the treatment. 
A)  Atropine. 
B)  Activate the rapid response team. 
C)  Lidocaine. 
D)  Discontinue the treatment.

Question 4

What parameter is measured on the vertical axis of the ECG paper?

Accepted Answer

A)  Time 
B)  Voltage 
C)  Cardiac contraction rate 
D)  Blood flow 
A)  Time 
B)  Voltage 
C)  Cardiac contraction rate 
D)  Blood flow

Question 5

A run of three or more PVCs should be called:

Accepted Answer

A)  ventricular tachycardia. 
B)  ventricular fibrillation. 
C)  atrial tachycardia. 
D)  supra ventricular tachycardia. 
A)  ventricular tachycardia. 
B)  ventricular fibrillation. 
C)  atrial tachycardia. 
D)  supra ventricular tachycardia.

Question 6

At what part of the cardiac conduction system does the electrical impulse travel most rapidly?

Accepted Answer

A)  Bundle of His 
B)  Bundle branches 
C)  Intraatrial pathways 
D)  Purkinje fibers 
A)  Bundle of His 
B)  Bundle branches 
C)  Intraatrial pathways 
D)  Purkinje fibers

Question 7

What is implied by an abnormally prolonged PR interval?

Accepted Answer

A)  Atrioventricular block 
B)  Bundle-branch block 
C)  Myocardial infarction 
D)  Valvular detachment 
A)  Atrioventricular block 
B)  Bundle-branch block 
C)  Myocardial infarction 
D)  Valvular detachment

Question 8

The ECG you are looking at has one P wave for every QRS complex and the PR interval is 0.30 sec. What is your interpretation?

Accepted Answer

A)  First-degree heart block 
B)  Right-axis deviation 
C)  Third-degree heart block 
D)  Atrial hypertrophy 
A)  First-degree heart block 
B)  Right-axis deviation 
C)  Third-degree heart block 
D)  Atrial hypertrophy

Question 9

The QRS of an ECG falls on a dark vertical line of the ECG paper. Subsequent QRS complexes fall on every other dark line (10 mm apart). What is the ventricular rate?

Accepted Answer

A)  300/min 
B)  200/min 
C)  150/min 
D)  100/min 
A)  300/min 
B)  200/min 
C)  150/min 
D)  100/min

Question 10

Which of the following waves represents depolarization of the ventricles?

Accepted Answer

A)  P wave 
B)  QRS wave 
C)  T wave 
D)  U wave 
A)  P wave 
B)  QRS wave 
C)  T wave 
D)  U wave

Question 11

Your patient has a normal ECG reading. What does this finding tell you about the patient's likelihood of having a myocardial infarction in the immediate future?

Accepted Answer

A)  Less than a 10% chance 
B)  Less than a 30% chance 
C)  Less than 50% chance 
D)  No predictive value 
A)  Less than a 10% chance 
B)  Less than a 30% chance 
C)  Less than 50% chance 
D)  No predictive value

Question 12

For which of the following arrhythmias would an electronic pacemaker be indicated?

Accepted Answer

A)  First-degree block 
B)  Sinus tachycardia 
C)  Third-degree block 
D)  Ventricular fibrillation 
A)  First-degree block 
B)  Sinus tachycardia 
C)  Third-degree block 
D)  Ventricular fibrillation

Question 13

What medication is most useful for the treatment of premature ventricular contractions?

Accepted Answer

A)  Digoxin 
B)  Atropine 
C)  Lidocaine 
D)  Digitalis 
A)  Digoxin 
B)  Atropine 
C)  Lidocaine 
D)  Digitalis

Question 14

What is the normal maximum length of the P wave?

Accepted Answer

A)  1 mm 
B)  3 mm 
C)  5 mm 
D)  7 mm 
A)  1 mm 
B)  3 mm 
C)  5 mm 
D)  7 mm

Question 15

Which of the following is NOT a common characteristic of a premature ventricular complex (PVC)?

Accepted Answer

A)  No P wave prior to the QRS complex 
B)  Widened QRS complex 
C)  Bizarre QRS complex 
D)  Narrow QRS complex 
A)  No P wave prior to the QRS complex 
B)  Widened QRS complex 
C)  Bizarre QRS complex 
D)  Narrow QRS complex

Exam 18: Interpreting the Electrocardiogram

What condition is often associated with right-axis deviation?

While a patient is receiving an albuterol treatment, the nurse performs an ECG. The ECG shows the patient's heart rate had increased from 98 to 120 beats/min with narrow QRS complexes preceded by a P wave. What is the appropriate course of treatment for this patient?

What parameter is measured on the vertical axis of the ECG paper?

A run of three or more PVCs should be called:

At what part of the cardiac conduction system does the electrical impulse travel most rapidly?

What is implied by an abnormally prolonged PR interval?

The ECG you are looking at has one P wave for every QRS complex and the PR interval is 0.30 sec. What is your interpretation?

The QRS of an ECG falls on a dark vertical line of the ECG paper. Subsequent QRS complexes fall on every other dark line (10 mm apart). What is the ventricular rate?

Which of the following waves represents depolarization of the ventricles?

Your patient has a normal ECG reading. What does this finding tell you about the patient's likelihood of having a myocardial infarction in the immediate future?

For which of the following arrhythmias would an electronic pacemaker be indicated?

What medication is most useful for the treatment of premature ventricular contractions?

What is the normal maximum length of the P wave?

Which of the following is NOT a common characteristic of a premature ventricular complex (PVC)?

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