DC Dysrhythmia Equipment & Technology 2

Question 1

What type of pacemaker fires only when the heart's intrinsic rate falls below a programmed set rate?

Accepted Answer

Demand (synchronous) pacemaker

Answer

Fixed-rate (asynchronous) pacemaker

Answer

Biventricular pacemaker

Answer

Epicardial pacemaker

Question 2

In the NASPE/BPEG pacemaker nomenclature code, what does the first letter represent?

Accepted Answer

Chamber(s) paced

Answer

Rate response capability

Answer

Chamber(s) sensed

Answer

Programming features

Question 3

What ECG finding is characteristic of a functioning ventricular pacemaker spike?

Accepted Answer

Wide QRS complex preceded by a pacemaker spike

Answer

Narrow QRS complex preceded by a pacemaker spike

Answer

Delta wave with a short PR interval

Answer

Prolonged PR interval with normal QRS width

Question 4

What is pacemaker failure to capture?

Accepted Answer

A pacemaker spike is present but does not produce myocardial depolarization

Answer

The pacemaker fails to sense intrinsic cardiac activity

Answer

The pacemaker fires at an incorrect rate

Answer

The pacemaker fails to inhibit when intrinsic activity occurs

Question 5

Which condition most commonly causes pacemaker failure to sense?

Accepted Answer

Lead dislodgement or fracture

Answer

Low battery voltage

Answer

Electromagnetic interference

Answer

Increased pacing threshold

Question 6

What is the function of rate modulation (R) in modern pacemakers?

Accepted Answer

Adjusts pacing rate based on physiologic demand such as physical activity

Answer

Prevents pacemaker-mediated tachycardia

Answer

Reduces battery drain during periods of rest

Answer

Synchronizes atrial and ventricular pacing timing