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Exam 11: Pacemaker Rhythms

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Question 21

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A patient known to have an AV pacemaker has been brought to the emergency department of the hospital where you work. The patient is pale, is having difficulty breathing, and is barely conscious. At the physician's request, you perform an immediate ECG. A portion of the tracing is shown here. What may be causing the patient's signs and symptoms?

A) The pacemaker is sending too many impulses, and the patient's heart cannot respond quickly enough.
B) The pacemaker is functioning, but the patient's heart is not depolarizing after every impulse, leading to low cardiac output.
C) The pacemaker has stopped functioning, and the patient is in cardiac arrest.
D) The pacemaker is oversensing, so it is generating impulses at a slower rate than it should, resulting in a slow heart rate and low cardiac output.

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Question 22

Multiple Choice

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Pacemaker generators use what type of batteries to create the electrical impulses?

A) Alkaline
B) Nickel-cadmium
C) Lithium
D) Solar

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Question 23

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What factor on an AV pacemaker tracing is similar to the measurement of the PR interval on a normal rhythm tracing?

Which of the following terms describes what happens when a pacemaker does not detect any cardiac electrical activity and never turns off?

AV pacing is similar to what characteristic of the heart?

If a patient is experiencing hypotension, lightheadedness, blackouts, and bradycardia, what pacemaker complication may be occurring?

Which of the following terms indicates that something caused electrical impulses to occur?

In which pacemaker complication does the tracing show a pacing spike but no waveform immediately after it?

Which of the following most accurately describes evidence of mechanical capture?

What type of pacemaker is evident in this ECG tracing?

When is a ventricular pacemaker used alone?

Before you perform an ECG on your patient, he informs you that he has a pacemaker but isn't sure what kind. A portion of the ECG tracing is shown here. What type of pacemaker does this patient have?

Which of the following is not a typical pacemaker complication?

Which of the following is not one of the questions to ask when evaluating a pacemaker ECG tracing?

Which pacemaker rhythm does not have a pacing spike before P waves?

Which of the following statements best describes an atrioventricular pacemaker?

When the pacemaker delivers ventricular pacing, the pacing spike is followed by a wide QRS complex, which looks similar to which of the following?

Which of the following pacemaker complications may be due to a battery that needs to be replaced?