ECG Chapter 11 Review

What is the advantage of atrioventricular pacing?

• It mimics the normal cardiac conduction system and allows for atrial kick (10-30% cardiac output).

• It reduces the heart rate significantly.

• It eliminates the need for any cardiac medication.

• It increases the size of the heart chambers.

What mode of pacing results in a QRS of normal duration?

• Atrial pacing

• Ventricular pacing

• Dual-chamber pacing

• Biventricular pacing

When would ventricular pacing be used alone?

• When the heart rate is too fast.

• When the AV node or ventricles are not working properly.

• When the patient is experiencing high blood pressure.

• When the atria are contracting normally.

When would atrial pacing be used alone?

• When there are no impulses coming from the atria and the conduction system from the AV node through the ventricles is intact and functioning.

• When the ventricles are not functioning properly.

• When the AV node is blocked.

• When the atria are overactive.

What measurement on the ECG tracing represents how long it takes for the impulse to travel through the ventricular myocardial tissue?

• P wave duration

• QRS duration

• T wave duration

• PR interval

What is the patient's own heart rhythm called?

• Inherent heart rhythm

• External heart rhythm

• Artificial heart rhythm

• Induced heart rhythm

Appearance of a QRS complex after a pacing spike indicates that what has occurred?

• Atrial capture

• Ventricular capture

• Sinus rhythm

• Atrial fibrillation

AV sequential pacing is similar to what characteristic of the heart?

• Normal conduction pathways of the heart

• Heart rate variability

• Blood pressure regulation

• Oxygen saturation levels

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

• Trigger

• Inhibit

• Delay

• Block

What pacemaker code would you use for a pacemaker that is capable of pacing in both chambers, is capable of sensing intrinsic cardiac activity in both the atria and the ventricles, is capable of both triggered pacing (rarely used) and inhibiting itself to sensed cardiac activity, is rate responsive (increasing rate during periods of increased metabolic demand), and is not a multi-site pacemaker?

• DDDR

• VVI

• AAI

• DDDRO