1|Page
CRAT TEST FINAL EXAM AND PRACTICE EXAM QUESTIONS
2025 WITH DETAILED VERIFIED ANSWERS (100% CORRECT
ANSWERS) /ALREADY GRADED A+
Conditions unrelated to respiration may produce sinus arrhythmia, such
as all of the following except? ......ANSWER......Conditions involving
decreased intracranial pressure
Which of the following would be considered the approximate O2
saturation of the blood in the right atrium? ......ANSWER......60-75%
Which of the following would be considered one of the grievance
categories? ......ANSWER......Expedited
Which of the following types of permanent pacemakers are typically
used today? ......ANSWER......Demand
AAI pacemakers are not used in which of the following conditions?
......ANSWER......AV block
What is unique about the T wave on a rhythm strip with ventricular
tachycardia? ......ANSWER......Opposite direction from QRS complex
Which of the following is not a cause of temporary AV block?
......ANSWER......Cardiomyopathy
,2|Page
If ischemia is repaired in the AV node, it will have which of the following
effects? ......ANSWER......Restores normal function
ECG graph paper consists of precisely spaced horizontal lines that
represent time measured in millimeters, 25 mm is equal to which of the
following increments of time? ......ANSWER......1 second
The method of calculating ventricular rate that involves beginning with
the first R wave that peaks on a heavy black line is known as which of
the following? ......ANSWER......Sequence method
Which of the following is not typically one of the causes of ventricular
fibrillation? ......ANSWER......Angina
The approximate delay in seconds between the atria and the ventricle
would be considered __________? ......ANSWER......0.13 seconds
Junctional arrhythmias originate in which of the following
......ANSWER......Atrioventricular junction
One of the five basic changes that are evident on the ECG tracing from
complications that represents failure to depolarize is known as which of
the following? ......ANSWER......Loss of capture
, 3|Page
Which of the following is a disorder of impulse formation that is caused
by a lack of electrical activity in the atrium? ......ANSWER......Sinus arrest
Stimulation of the carotid sinus that causes episodes of asystole
resulting in recurrent syncope is known as which of the following?
......ANSWER......Hypersensitive carotid sinus
Cardiac valves which have half-mooned shaped cusps would be
considered which of the following? ......ANSWER......Pulmonic valves
Which of the following is an advantage of a DDD pacemaker?
......ANSWER......Versatility
Which of the following does the normal slowing of the impulse as it
passes through the AV node cause? ......ANSWER......The atria to fill the
ventricle
The VVI pacemaker paces and senses which of the following?
......ANSWER......Ventricles
Junctional escape rhythms happen on which of the following leads
when the "P" wave occurs? ......ANSWER......Leads 2, 3, and aVF
Third degree AV block is generally which kind of condition?
......ANSWER......Congenital
CRAT TEST FINAL EXAM AND PRACTICE EXAM QUESTIONS
2025 WITH DETAILED VERIFIED ANSWERS (100% CORRECT
ANSWERS) /ALREADY GRADED A+
Conditions unrelated to respiration may produce sinus arrhythmia, such
as all of the following except? ......ANSWER......Conditions involving
decreased intracranial pressure
Which of the following would be considered the approximate O2
saturation of the blood in the right atrium? ......ANSWER......60-75%
Which of the following would be considered one of the grievance
categories? ......ANSWER......Expedited
Which of the following types of permanent pacemakers are typically
used today? ......ANSWER......Demand
AAI pacemakers are not used in which of the following conditions?
......ANSWER......AV block
What is unique about the T wave on a rhythm strip with ventricular
tachycardia? ......ANSWER......Opposite direction from QRS complex
Which of the following is not a cause of temporary AV block?
......ANSWER......Cardiomyopathy
,2|Page
If ischemia is repaired in the AV node, it will have which of the following
effects? ......ANSWER......Restores normal function
ECG graph paper consists of precisely spaced horizontal lines that
represent time measured in millimeters, 25 mm is equal to which of the
following increments of time? ......ANSWER......1 second
The method of calculating ventricular rate that involves beginning with
the first R wave that peaks on a heavy black line is known as which of
the following? ......ANSWER......Sequence method
Which of the following is not typically one of the causes of ventricular
fibrillation? ......ANSWER......Angina
The approximate delay in seconds between the atria and the ventricle
would be considered __________? ......ANSWER......0.13 seconds
Junctional arrhythmias originate in which of the following
......ANSWER......Atrioventricular junction
One of the five basic changes that are evident on the ECG tracing from
complications that represents failure to depolarize is known as which of
the following? ......ANSWER......Loss of capture
, 3|Page
Which of the following is a disorder of impulse formation that is caused
by a lack of electrical activity in the atrium? ......ANSWER......Sinus arrest
Stimulation of the carotid sinus that causes episodes of asystole
resulting in recurrent syncope is known as which of the following?
......ANSWER......Hypersensitive carotid sinus
Cardiac valves which have half-mooned shaped cusps would be
considered which of the following? ......ANSWER......Pulmonic valves
Which of the following is an advantage of a DDD pacemaker?
......ANSWER......Versatility
Which of the following does the normal slowing of the impulse as it
passes through the AV node cause? ......ANSWER......The atria to fill the
ventricle
The VVI pacemaker paces and senses which of the following?
......ANSWER......Ventricles
Junctional escape rhythms happen on which of the following leads
when the "P" wave occurs? ......ANSWER......Leads 2, 3, and aVF
Third degree AV block is generally which kind of condition?
......ANSWER......Congenital
