CET Rhythm Interpretation & Patient Care 3

Question 1

A rhythm strip shows no identifiable P waves, an irregularly irregular ventricular response, and a rate of 110 bpm. What rhythm is this?

Accepted Answer

Atrial fibrillation with rapid ventricular response

Answer

Atrial fibrillation with rapid ventricular response presents with an irregularly irregular rhythm, absent distinct P waves, and a ventricular rate above 100 bpm.

Question 2

Which ECG finding indicates ventricular fibrillation?

Accepted Answer

Chaotic, undulating baseline with no identifiable QRS complexes

Answer

Ventricular fibrillation produces a chaotic, disorganized baseline with no discernible P waves, QRS complexes, or T waves.

Question 3

On a 12-lead ECG, ST-segment elevation in leads II, III, and aVF most suggests injury to which territory?

Accepted Answer

Inferior wall

Answer

Leads II, III, and aVF are the inferior leads; ST elevation in these leads indicates inferior wall myocardial injury.

Question 4

A patient's rhythm strip shows regular P waves at 80 bpm, but only every other P wave is followed by a QRS. What is this rhythm?

Accepted Answer

Second-degree AV block, Mobitz Type II with 2:1 conduction

Answer

A 2:1 AV block means every other P wave conducts to the ventricles, which is consistent with Mobitz Type II presenting with 2:1 conduction.

Question 5

Which characteristic best distinguishes ventricular tachycardia (VT) from supraventricular tachycardia (SVT) with aberrant conduction on an ECG?

Accepted Answer

AV dissociation (independent P waves and QRS complexes)

Answer

AV dissociation, where P waves and QRS complexes are independent, is a hallmark of ventricular tachycardia and helps differentiate it from SVT with aberrancy.

(CET) Certified Electrocardiogram Technician Practice Test

(CET) Certified Electrocardiogram Technician Practice Test

CET Rhythm Interpretation & Patient Care 3