CET Emergency Cardiac Monitoring 3

Question 1

The Brugada pattern on an ECG is characterized by:

Accepted Answer

Coved-type ST elevation in V1–V2 with RBBB morphology

Answer

The classic Brugada pattern shows a coved-type (downsloping) ST elevation ≥2 mm in V1–V2 with an incomplete or complete RBBB appearance.

Question 2

During an emergency, a patient develops third-degree AV block. The MOST reliable backup pacemaker in this setting originates from the:

Accepted Answer

Purkinje fibers or ventricular myocardium

Answer

In complete heart block with no conduction through the AV node, an escape rhythm arises from ventricular tissue (Purkinje fibers) at a rate of 20–40 bpm.

Question 3

A patient receiving IV amiodarone has a QTc of 560 ms on telemetry. The ECG technician should:

Accepted Answer

Immediately notify the nurse or physician

Answer

A QTc ≥500 ms significantly increases the risk of torsades de pointes and requires immediate clinical notification.

Question 4

Which of the following best describes 'demand' pacemaker function during emergency monitoring?

Accepted Answer

Paces only when the heart rate falls below a programmed rate

Answer

A demand pacemaker senses intrinsic cardiac activity and delivers a pacing stimulus only when the native rate drops below the programmed lower rate limit.

Question 5

On a monitor, a patient shows a regular wide-complex tachycardia at 150 bpm. A useful bedside clue that favors VT over SVT with aberrancy is:

Accepted Answer

AV dissociation visible on the rhythm strip

Answer

AV dissociation — P waves marching independently of QRS complexes — strongly supports ventricular tachycardia as the diagnosis.

(CET) Certified Electrocardiogram Technician Practice Test

(CET) Certified Electrocardiogram Technician Practice Test

CET Emergency Cardiac Monitoring 3