CMT Cardiac Dysrhythmias and Arrhythmias 3

Question 1

Which finding on an ECG strip indicates third-degree (complete) AV block?

Accepted Answer

P waves and QRS complexes firing independently with no association

Answer

In third-degree AV block, atria and ventricles beat independently — P waves and QRS complexes have no consistent relationship.

Question 2

Ventricular fibrillation on a monitor appears as:

Accepted Answer

Chaotic, irregular waveforms with no identifiable QRS complexes

Answer

Ventricular fibrillation produces chaotic, irregular undulations with no discernible QRS complexes, representing disorganized ventricular electrical activity.

Question 3

A patient develops a regular wide-complex tachycardia at 180 bpm. The most dangerous assumption to make is that this is:

Accepted Answer

SVT with aberrant conduction

Answer

Assuming a wide-complex tachycardia is SVT with aberrancy is dangerous because the majority are ventricular tachycardia, requiring prompt intervention.

Question 4

What is the escape rate of a junctional (AV nodal) escape rhythm?

Accepted Answer

40-60 bpm

Answer

The AV node has an inherent pacemaker rate of 40-60 bpm and will generate escape beats when higher pacemakers fail.

Question 5

Which arrhythmia is defined as three or more consecutive PVCs at a rate greater than 100 bpm?

Accepted Answer

Ventricular tachycardia

Answer

Ventricular tachycardia is defined as three or more consecutive ventricular beats at a rate exceeding 100 bpm.

(CMT) Certified Cardiac Monitor Technician Practice Test

(CMT) Certified Cardiac Monitor Technician Practice Test

CMT Cardiac Dysrhythmias and Arrhythmias 3