CRAT Pacemaker Rhythm Analysis 2

Question 1

A pacemaker spike followed by a wide, abnormal QRS complex indicates what type of pacing?

Accepted Answer

Ventricular pacing with successful capture

Answer

Atrial pacing with successful capture

Answer

Failure to capture

Answer

Oversensing

Question 2

Pacemaker failure to capture is identified by which ECG finding?

Accepted Answer

Pacemaker spikes visible without subsequent QRS complexes

Answer

Pacemaker spikes followed by wide QRS complexes

Answer

Absence of pacemaker spikes despite slow heart rate

Answer

Pacemaker spikes occurring at twice the programmed rate

Question 3

Pacemaker oversensing causes which problem?

Accepted Answer

Inappropriate inhibition of pacing pulses due to sensing signals that are not cardiac in origin

Answer

Failure to sense intrinsic cardiac activity

Answer

Pacing at a rate faster than programmed

Answer

Pacing spikes that do not produce QRS complexes

Question 4

The NBG (NASPE/BPEG) pacemaker code uses letters to describe pacemaker function. In a VVI pacemaker, what does the second 'V' indicate?

Accepted Answer

The ventricle is the sensed chamber

Answer

The ventricle is the paced chamber

Answer

The mode is inhibited

Answer

The device is rate-responsive

Question 5

In a DDD pacemaker, what does the first 'D' represent?

Accepted Answer

Both atrium and ventricle are paced (dual chamber pacing)

Answer

Only the atrium is paced

Answer

Only the ventricle is paced

Answer

The device is in triggered mode

Question 6

Pacemaker undersensing is identified by which ECG pattern?

Accepted Answer

Pacemaker spikes firing at inappropriate times during or after intrinsic cardiac beats

Answer

Complete absence of pacemaker spikes

Answer

Pacemaker spikes only during tachycardia

Answer

Pacemaker spikes exactly timed to the R wave