Question 1

What is a possible serious complication associated with atrial fibrillation?

Accepted Answer

A) pulmonary edema 
B) atrial thrombi 
C) cardiac tamponade 
D) cardiac standstill 
A) pulmonary edema 
B) atrial thrombi 
C) cardiac tamponade 
D) cardiac standstill

Question 2

An occasional premature ventricular complex (PVC) is not of major concern.

Accepted Answer

A) True 
 B)False

Question 3

On inspection of an ECG rhythm strip from an adult patient, you notice the following: regular sawtooth-like waves occurring at a rate of 280/min and a regular ventricular rhythm occurring at a rate of about 140/min. What is the most likely interpretation?

Accepted Answer

A) atrial fibrillation 
B) atrial flutter 
C) ventricular tachycardia 
D) ventricular fibrillation 
A) atrial fibrillation 
B) atrial flutter 
C) ventricular tachycardia 
D) ventricular fibrillation

Question 4

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 5

What is suggested by inverted T waves on the ECG?

Accepted Answer

A) atrial enlargement 
B) myocardial ischemia 
C) ventricular hypertrophy 
D) dextrocardia 
A) atrial enlargement 
B) myocardial ischemia 
C) ventricular hypertrophy 
D) dextrocardia

Question 6

Which of the following clinical conditions is not associated with tachycardia?

Accepted Answer

A) anxiety 
B) hypoxemia 
C) pain 
D) hypothermia 
A) anxiety 
B) hypoxemia 
C) pain 
D) hypothermia

Question 7

What structure normally paces the healthy heart?

Accepted Answer

A) atrioventricular (AV) node 
B) sinoatrial (S
A)  node 
C) bundle of His 
D) Purkinje fibers 
A) atrioventricular (AV) node 
B) sinoatrial (S
A)  node 
C) bundle of His 
D) Purkinje fibers

Question 8

Which of the following medications is used to treat sinus bradycardia?

Accepted Answer

A) atropine 
B) digitalis 
C) propranolol 
D) lidocaine 
A) atropine 
B) digitalis 
C) propranolol 
D) lidocaine

Question 9

Valvular defects in the heart can be detected with a 12-lead ECG.

Accepted Answer

A) True 
 B)False

Question 10

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 11

Sources for the electrical impulse that triggers cardiac contraction that lie outside the sinoatrial node are referred to as ectopic foci.

Accepted Answer

A) True 
 B)False

Question 12

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 13

Why is the electrical impulse temporarily delayed at the atrioventricular (AV) node?

Accepted Answer

A) to allow complete emptying of the ventricles 
B) to allow more sodium buildup in the myocardial cells 
C) to allow better filling of the ventricles 
D) to allow complete filling of the atria 
A) to allow complete emptying of the ventricles 
B) to allow more sodium buildup in the myocardial cells 
C) to allow better filling of the ventricles 
D) to allow complete filling of the atria

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

Exam 17: Interpreting the Electrocardiogram

What is a possible serious complication associated with atrial fibrillation?

An occasional premature ventricular complex (PVC) is not of major concern.

On inspection of an ECG rhythm strip from an adult patient, you notice the following: regular sawtooth-like waves occurring at a rate of 280/min and a regular ventricular rhythm occurring at a rate of about 140/min. What is the most likely interpretation?

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

What is suggested by inverted T waves on the ECG?

Which of the following clinical conditions is not associated with tachycardia?

What structure normally paces the healthy heart?

Which of the following medications is used to treat sinus bradycardia?

Valvular defects in the heart can be detected with a 12-lead ECG.

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

Sources for the electrical impulse that triggers cardiac contraction that lie outside the sinoatrial node are referred to as ectopic foci.

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

Why is the electrical impulse temporarily delayed at the atrioventricular (AV) node?

What is the normal maximum length of the P wave?

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