CCT Cardiac Monitoring & Emergency Response 3

Question 1

When applying electrodes for a 5-lead bedside monitoring system, where is the chest (C/V) electrode typically placed for the MCL1 equivalent?

Accepted Answer

Right sternal border, 4th intercostal space

Answer

The chest electrode placed at V1 position (right sternal border, 4th ICS) with lead III selected approximates the MCL1 monitoring lead.

Question 2

ST-segment changes are measured from which reference point on the ECG?

Accepted Answer

The J point (end of QRS)

Answer

ST-segment elevation or depression is measured at the J point (junction between the end of the QRS complex and the beginning of the ST segment).

Question 3

A patient with a known history of long QT syndrome is placed on telemetry. Which rhythm is this patient most at risk of developing?

Accepted Answer

Torsades de pointes

Answer

Long QT syndrome predisposes patients to early afterdepolarizations that can trigger torsades de pointes, a polymorphic ventricular tachycardia.

Question 4

Which of the following best describes the correct action after identifying ventricular fibrillation on the monitor?

Accepted Answer

Begin CPR and prepare for unsynchronized defibrillation

Answer

VF is a pulseless rhythm requiring immediate CPR and unsynchronized defibrillation; no R wave exists to synchronize a shock.

Question 5

A QRS complex that measures 0.14 seconds is best described as:

Accepted Answer

Prolonged, indicating bundle branch block

Answer

A QRS duration ≥0.12 seconds (120 ms) indicates intraventricular conduction delay such as bundle branch block; 0.14 s is clearly prolonged.

(CCT) Certified Cardiac Technician Practice Test