Question 1

Over sensing or under sensing pacemakers can be detected on an ECG when the pacemaker fails to sense intrinsic _____________.

Accepted Answer

The answer of Over sensing or under sensing pacemakers can...

Question 2

A noticeable apical or peripheral pulse rate is usually the only outward sign that a patient has which of the following?

Accepted Answer

The answer of A noticeable apical or peripheral pulse rate...

Question 3

What type of heart rates occur more commonly in infants, children, and young adults who are anxious or extremely fatigued?

Accepted Answer

Supraventricular tachycardia (SVT) is more common in infants, children, and young adults, especially when they are anxious or extremely fatigued. SVT is a rapid heart rate originating from above the ventricles, which can be triggered by stress or exhaustion.

Question 4

Which of the following weakens an arterial wall and can cause the vessel to rupture?

Accepted Answer

Aneurysms weaken the wall of an artery, which can lead to rupture if not treated.

Question 5

Except for ______________, in the other ventricular arrhythmias, the P wave is non-existent, so there is no atrial depolarization, no atrial contraction, and no atrial kick.

Accepted Answer

The answer of Except for ______________, in the other ventricular...

Question 6

The ECG tracings in Figure 8-18 are very short vertical straight lines which can be as small as 2 ms. What do these tracings represent?

Accepted Answer

The answer of The ECG tracings in Figure 8-18 are...

Question 7

Embolic strokes often form in the heart due to _____________.

Accepted Answer

The answer of Embolic strokes often form in the heart...

Question 8

What type of pacemaker rhythm is shown in the ECG tracing below?

Accepted Answer

The answer of What type of pacemaker rhythm is shown...

Question 9

Failure of the heart to pump oxygenated blood efficiently causing cardiopulmonary arrest, is an example of what type of cardiac compromise?

Accepted Answer

Mechanical malfunction refers to the heart's inability to pump blood effectively, which can lead to cardiopulmonary arrest.

Question 10

The ECG tracing below identifies the sinus P wave and possible P prime (P') wave presentations for what type of rhythm?

Accepted Answer

The answer of The ECG tracing below identifies the sinus...

Question 11

A patient in asystole is not defibrillated as this is what type of condition?

Accepted Answer

Asystole is considered a terminal condition because it represents a state of no electrical activity in the heart, indicating that the heart has stopped beating entirely. Defibrillation is ineffective in asystole because there is no electrical rhythm to reset.

Question 12

When the malfunction is ________________, the ECG will show no pacemaker spikes on the ECG tracing.

Accepted Answer

Failure to pace occurs when the pacemaker does not deliver an electrical stimulus when it is supposed to, resulting in no pacemaker spikes being visible on the ECG tracing.

Question 13

In what type of rhythm will ventricular pacemaker spikes be seen before each QRS complex and normally, no atrial spikes are visible, and   P waves may not be visible, except possibly in precordial lead V1?

Accepted Answer

Ventricular pacing rhythm is characterized by the presence of ventricular pacemaker spikes before each QRS complex, typically without visible atrial spikes. P waves may not be visible, except possibly in precordial lead V1, because the pacing is focused on the ventricles, not the atria.

Question 14

Untreated ischemia causes injury to what part of the heart?

Accepted Answer

Ischemia refers to a lack of blood supply to a part of the body, leading to a shortage of oxygen and nutrients. In the context of the heart, untreated ischemia primarily affects the myocardium, which is the muscular tissue of the heart responsible for pumping blood. This can lead to myocardial infarction (heart attack) if not treated promptly.

Question 15

An ECG tracing from a patient with a pacemaker may have wide or bizarre __________ if the pacemaker captures the chamber it is pacing.

Accepted Answer

Pacemakers primarily affect the QRS complex because they directly stimulate the ventricles, leading to a wider and more bizarre appearance compared to a natural QRS complex. This is due to the artificial and non-physiological pathway of electrical conduction caused by the pacemaker's stimulation.

Question 16

The difference between a pacemaker and the ICD is that the ICD can deliver two levels of electrical__________.

Accepted Answer

The answer of The difference between a pacemaker and the...

Question 17

The treatment for controlling atrial arrhythmias is to first control the heart rate, then use of ______________ to return the atria to a sinus rhythm.

Accepted Answer

The answer of The treatment for controlling atrial arrhythmias is...

Question 18

Which of the following does not allow the heart to rest between contractions (depolarization)?

Accepted Answer

The answer of Which of the following does not allow...

Question 19

Which of the following is the use of high electrical energy to destroy abnormal electrical pathways?

Accepted Answer

Ablation is the procedure that uses high electrical energy to destroy abnormal electrical pathways in the heart, which can cause heart rhythm disorders.

Question 20

Which of the following is considered a very unstable rhythm that is usually a precursor to ventricular fibrillation or sudden cardiac death?

Accepted Answer

Ventricular tachycardia is considered a very unstable rhythm that can be a precursor to ventricular fibrillation or sudden cardiac death. It is characterized by a rapid heart rate originating from the ventricles and can deteriorate into more life-threatening arrhythmias if not treated promptly.

Quiz 8: Recognizing Arrhythmias Pacemakers and Emergencies