Free CRAT Arrhythmia Recognition, Anatomy, and Physiology Questions and Answers

Question 1

Which of the following rhythms may be characterized by regular P-P and regular R-R intervals occurring at different rates?

Accepted Answer

Complete heart block

Answer

Explanation:
In a complete heart block, there is a dissociation between the atrial and ventricular rates, resulting in regular P-P intervals (atrial rate) and regular R-R intervals (ventricular rate), but occurring at different rates due to the interruption in the electrical conduction between the atria and ventricles.

Question 2

If a dual chamber pacemaker ventricular lead senses a non-cardiac signal, what is MOST LIKELY to occur?

Accepted Answer

Failure to ventricular pace

Answer

Explanation:
If a dual chamber pacemaker's ventricular lead senses a non-cardiac signal, it may incorrectly interpret it as a heartbeat, leading to a failure to deliver the appropriate pacing stimulus to the ventricle. This can result in a failure to ventricular pace, meaning the ventricle does not receive the necessary pacing impulse, potentially leading to symptoms related to bradycardia or other rhythm disturbances.

Question 3

What cardiac rhythm is shown in this presenting rhythm strip from a trans telephonic pacemaker check?

Accepted Answer

Paced atrial rhythm

Answer

Explanation:
In a paced atrial rhythm, regular spikes are seen representing the pacing of the atria by the pacemaker. This is characterized by consistent atrial pacing spikes followed by atrial depolarization.

Question 4

A characteristic of a third-degree AVB is:

Accepted Answer

The conduction of the atrial impulse failing to reach the ventricle

Answer

Explanation:
In third-degree atrioventricular block (AVB), also known as complete heart block, the atrial electrical impulses fail to conduct to the ventricles. This results in an independent rhythm between the atria and ventricles, leading to the characteristic dissociation between P waves and QRS complexes on an ECG.

Question 5

A PVC that occurs during the relative refractory period is referred to as:

Accepted Answer

R-on-T

Answer

Explanation:
A PVC (Premature Ventricular Contraction) that occurs during the relative refractory period, where the ventricles are still in a vulnerable state, is referred to as the R-on-T phenomenon. It's called so because the PVC occurs on the peak of the T wave of the preceding beat, potentially leading to dangerous arrhythmias like ventricular tachycardia or ventricular fibrillation.

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT - Certified Rhythm Analysis Technician Practice Test

Free CRAT Arrhythmia Recognition, Anatomy, and Physiology Questions and Answers