CET Holter Monitoring & Ambulatory ECG 3

Question 1

A Holter monitor uses a modified Mason-Likar lead system. Compared to standard 12-lead ECG limb leads, the limb electrodes are repositioned to:

Accepted Answer

The torso to reduce motion artifact

Answer

In the Mason-Likar system, limb electrodes are moved to the torso to minimize movement artifact during ambulatory monitoring.

Question 2

Which Holter finding is considered a class I indication for permanent pacemaker implantation?

Accepted Answer

Symptomatic sinus pauses greater than 3 seconds while awake

Answer

Symptomatic sinus node dysfunction with documented pauses causing symptoms meets class I criteria for permanent pacing per ACC/AHA guidelines.

Question 3

During ambulatory ECG monitoring, ST-segment depression that occurs without symptoms is termed:

Accepted Answer

Silent myocardial ischemia

Answer

Asymptomatic ST depression meeting ischemic criteria (≥1 mm, horizontal/downsloping, ≥1 min duration) is classified as silent myocardial ischemia.

Question 4

A patient wears a continuous-loop event monitor for 30 days. This device differs from a standard Holter monitor primarily because it:

Accepted Answer

Continuously records but only retains data around patient-triggered events

Answer

A continuous-loop event monitor constantly records but overwrites old data, retaining only the minutes before and after the patient presses the event button.

Question 5

A Holter report shows frequent couplets (pairs of PVCs). What is the minimum number of consecutive PVCs that defines ventricular tachycardia?

Accepted Answer

3

Answer

By definition, three or more consecutive PVCs at a rate ≥100 bpm constitutes ventricular tachycardia.

(CET) Certified Electrocardiogram Technician Practice Test

(CET) Certified Electrocardiogram Technician Practice Test

CET Holter Monitoring & Ambulatory ECG 3