CET Rhythm Interpretation & Patient Care 2

Question 1

A patient's ECG shows a regular rhythm with a rate of 150 bpm, narrow QRS complexes, and no visible P waves. What is the most likely rhythm?

Accepted Answer

Supraventricular tachycardia (SVT)

Answer

SVT typically presents with a regular rate of 150-250 bpm, narrow QRS complexes, and absent or hidden P waves.

Question 2

On a rhythm strip, you observe a P wave followed by a progressively lengthening PR interval until a QRS is dropped, then the cycle repeats. What is this rhythm?

Accepted Answer

Mobitz Type I (Wenckebach) block

Answer

Mobitz Type I (Wenckebach) is characterized by progressive PR interval prolongation followed by a dropped QRS beat.

Question 3

A patient with a known pacemaker has a rhythm strip showing pacemaker spikes not followed by QRS complexes. This finding most likely indicates:

Accepted Answer

Pacemaker failure to capture

Answer

Failure to capture occurs when the pacemaker fires but the impulse does not depolarize the myocardium, resulting in spikes without QRS complexes.

Question 4

While performing an ECG on an anxious patient, you notice artifact that mimics atrial fibrillation. What is the most appropriate first action?

Accepted Answer

Ask the patient to relax and hold still, then repeat the tracing

Answer

Muscle tremor artifact from an anxious or trembling patient can mimic AF; calming the patient and retaking the tracing is the correct first step.

Question 5

Which finding on a rhythm strip is most consistent with hyperkalemia?

Accepted Answer

Tall, peaked T waves with widened QRS

Answer

Hyperkalemia classically produces tall, peaked (tent-shaped) T waves and, at higher levels, widening of the QRS complex.

(CET) Certified Electrocardiogram Technician Practice Test

(CET) Certified Electrocardiogram Technician Practice Test

CET Rhythm Interpretation & Patient Care 2