Deck 8: Pacemaker Rhythms

Question 1

Identify the following rhythm: _________________________

Answer 1

Ventricular paced rhythm with 100% capture

Question 2

Identify the following rhythm: _________________________

Answer 2

Normal functioning dual-chamber pacemaker at 80 pulses/min

Question 3

The first letter of the pacemaker identification code represents _____.

A) the chamber sensed
B) the chamber paced
C) the mode of response
D) programmable functions

Answer 3

B
The first letter of the code identifies the heart chamber (or chambers)paced (stimulated).A pacemaker used to pace only a single chamber is represented by either A (atrial)or V (ventricular).A pacemaker capable of pacing in both chambers is represented by D (dual).

Question 4

Identify the following rhythm: _________________________

Question 5

In pacing,threshold refers to _____.

A) the ability of a pacemaker to recognize and respond to intrinsic electrical activity
B) the minimum level of electrical current needed to consistently depolarize the myocardium
C) a pacing lead with a single electrical pole at the distal tip of the pacing lead through which the stimulating pulse is delivered
D) the ability of a pacemaker to increase the pacing rate in response to physical activity or metabolic demand

Question 6

Identify the following rhythm: _________________________

Question 7

Your patient has a VVI pacemaker.Briefly explain the meaning of each of these letters.

Question 8

The second letter of the pacemaker identification code represents _____.

A) programmable functions
B) the chamber sensed
C) the mode of response
D) the chamber paced

Question 9

Explain the difference between electrical capture and mechanical capture.

Question 10

In pacing,sensitivity refers to _____.

A) the ability of a pacemaker to recognize and respond to intrinsic electrical activity
B) a pacing lead with a single electrical pole at the distal tip of the pacing lead through which the stimulating pulse is delivered
C) the successful conduction of an artificial pacemaker's impulse through the myocardium,resulting in depolarization
D) the length of time between an atrial sensed or atrial paced event and the delivery of a ventricular pacing stimulus

Question 11

A demand pacemaker is also known as a _____ pacemaker.

Question 12

A(n)_____ _____ is a vertical line on the ECG that indicates the artificial pacemaker has discharged.

Question 13

Your patient has a DDD pacemaker.Briefly explain the meaning of each of these letters.

Question 14

In pacing,rate modulation refers to _____.

A) the ability of a pacemaker to recognize and respond to intrinsic electrical activity
B) the minimum level of electrical current needed to consistently depolarize the myocardium
C) the ability of a pacemaker to increase the pacing rate in response to physical activity or metabolic demand
D) a pacing lead with a single electrical pole at the distal tip of the pacing lead through which the stimulating pulse is delivered.

Question 15

Explain the benefits of a dual-chamber pacemaker.

Question 16

Describe what is meant by the term overdrive pacing.

Question 17

Capture is _____.

A) the electrical stimulus delivered by a pacemaker's pulse generator
B) a vertical line on the ECG that indicates the pacemaker has discharged
C) the time measured between a sensed cardiac event and the next pacemaker output
D) the ability of a pacing stimulus to successfully depolarize the cardiac chamber that is being paced