Crat Practice Exam 2 UPDATED QUESTIONS
AND CORRECT ANSWERS
When the technician is performing a 12 lead EKG, how many electrodes are used to record
the 12 views of the heart? - CORRECT ANSWER 10
In measuring the ventricular regularity, if there is no R wave present, which of the following
could be measured instead? - CORRECT ANSWER The Q and S wave junction
Which of the following protects the ventricles from the 400-600 erratic atrial impulses that
occur during atrial fibrillation? - CORRECT ANSWER AV node
Generally there is no treatment necessary for bradycardia unless the patient shows symptoms
of which of the following? - CORRECT ANSWER Decreased cardiac output
Which of the following types of permanent pacing requires cardiac surgery to place wires? -
CORRECT ANSWER Epicardial pacing
If the contact on a electrode is not conducting well or the placement is wrong, which of the
following could occur? - CORRECT ANSWER Wandering baseline
Which of the following is the most common ECG electrode misconnection or reversal? -
CORRECT ANSWER Right arm/left arm
accelerated junctional rhythm is only significant if the patient is showing signs of which of
the following? - CORRECT ANSWER Decreased cardiac output
Sinus rhythm is the pacemaker action from which of the following? - CORRECT
ANSWER SA node
In the 1,500 method for calculating atrial rate, the technician should count which of the
following? - CORRECT ANSWER Squares between two consecutive P waves
, Resulting from the blood volume in the ventricles at the end of diastole the passive stretching
of the muscle fibers in the ventricles is called which of the following? - CORRECT
ANSWER Preload
Generally, the chest leads are oriented through which of the following to project through the
patient's back? - CORRECT ANSWER AV node
Sinus tachycardia occurs in approximately what percentage of patients following an acute
myocardial infarction? - CORRECT ANSWER 30%
Which of the following types of sinoatrial block can not be recognized on a rhythm strip? -
CORRECT ANSWER First degree
When evaluating pacemaker function, the evidence seen when viewing the cardiac tracing on
the heart monitor is known as which of the following? - CORRECT
ANSWER Electrical capture
Prolonged PR Intervals are associated with which of the following? - CORRECT
ANSWER Conduction delays
Short PR intervals are associated with which of the following? - CORRECT
ANSWER Pre-excitation syndromes
How many different types of atrial tachycardia are there? - CORRECT
ANSWER Three
Atrial flutter, multifocal atrial tachycardia, and junctional tachycardia are examples of which
of the following? - CORRECT ANSWER Supraventricular tachycardia
A patient with recurrent junctional tachycardia may be treated with which of the following? -
CORRECT ANSWER Ablation therapy
AND CORRECT ANSWERS
When the technician is performing a 12 lead EKG, how many electrodes are used to record
the 12 views of the heart? - CORRECT ANSWER 10
In measuring the ventricular regularity, if there is no R wave present, which of the following
could be measured instead? - CORRECT ANSWER The Q and S wave junction
Which of the following protects the ventricles from the 400-600 erratic atrial impulses that
occur during atrial fibrillation? - CORRECT ANSWER AV node
Generally there is no treatment necessary for bradycardia unless the patient shows symptoms
of which of the following? - CORRECT ANSWER Decreased cardiac output
Which of the following types of permanent pacing requires cardiac surgery to place wires? -
CORRECT ANSWER Epicardial pacing
If the contact on a electrode is not conducting well or the placement is wrong, which of the
following could occur? - CORRECT ANSWER Wandering baseline
Which of the following is the most common ECG electrode misconnection or reversal? -
CORRECT ANSWER Right arm/left arm
accelerated junctional rhythm is only significant if the patient is showing signs of which of
the following? - CORRECT ANSWER Decreased cardiac output
Sinus rhythm is the pacemaker action from which of the following? - CORRECT
ANSWER SA node
In the 1,500 method for calculating atrial rate, the technician should count which of the
following? - CORRECT ANSWER Squares between two consecutive P waves
, Resulting from the blood volume in the ventricles at the end of diastole the passive stretching
of the muscle fibers in the ventricles is called which of the following? - CORRECT
ANSWER Preload
Generally, the chest leads are oriented through which of the following to project through the
patient's back? - CORRECT ANSWER AV node
Sinus tachycardia occurs in approximately what percentage of patients following an acute
myocardial infarction? - CORRECT ANSWER 30%
Which of the following types of sinoatrial block can not be recognized on a rhythm strip? -
CORRECT ANSWER First degree
When evaluating pacemaker function, the evidence seen when viewing the cardiac tracing on
the heart monitor is known as which of the following? - CORRECT
ANSWER Electrical capture
Prolonged PR Intervals are associated with which of the following? - CORRECT
ANSWER Conduction delays
Short PR intervals are associated with which of the following? - CORRECT
ANSWER Pre-excitation syndromes
How many different types of atrial tachycardia are there? - CORRECT
ANSWER Three
Atrial flutter, multifocal atrial tachycardia, and junctional tachycardia are examples of which
of the following? - CORRECT ANSWER Supraventricular tachycardia
A patient with recurrent junctional tachycardia may be treated with which of the following? -
CORRECT ANSWER Ablation therapy
