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MED239 Chapters11&12
| Question | Answer |
|---|---|
| basic function of a pacemaker | To initiate depolarization |
| Atriobiventricular pacing | stimulates both ventricles to contract |
| Dual-chamber pacemaker | pacemaker has pacing electrodes in both the right atrium and the right ventricle |
| Dual-chamber pacemaker Provides for | coordination of the atria and ventricles. |
| Electronic pacemaker | A synthetic source of electrical current causing depolarization of the myocardium |
| Loss of capture | The pacing activity continues to occur without evidence that the electrical activity has depolarized |
| Electrical capture | Evidence on an ECG tracing, including the spacing of spikes and waveforms |
| Mechanical capture | The heart's ability to respond to electrical impulses delivered by a natural or electronic pacemaker |
| Atriobiventricular pacing | A sequential pacemaker stimulation of the atria and then both ventricles |
| pacemaker codes for programmability, rate-responsiveness | IV |
| Electronic pacemaker is also known as | an artificial pacemaker |
| patient is experiencing a bradycardic dysrhythmia, what is the artificial pacemaker rate typically set at | 70-72 beats per minute |
| Pacing spike | denotes the discharge of electric current from the pacemaker |
| Atrioventricular pacing | provides direct stimulation of the atria and right ventricle in a sequence pattern |
| Unipolar pacemaker | single contact with the heart |
| pacemaker delivers ventricular pacing, the pacing spike will be followed by what | A wide QRS complex |
| Inherent rhythm | patient's own heart rhythm |
| What type of batteries do pacemaker generators use | Lithium |
| entire rhythm strip displays an atrioventricular paced rhythm | 100% atrioventricular pacing |
| beta blockers | drugs used to treat hypertension |
| gamma camera | camera that records gamma radiation emitted by radioactive tracers in the blood |
| maximal exercise | THR of 220 minus the age of the patient |
| skin rasp | used to abrade the skin prior to electrode placement |
| submaximal exercise | THR of 220 minus the age multiplied by a percentage between 60 and 85 |
| cardiologist | physician who specializes in the study of the heart |
| radiologist | physician who specializes in the use of radioactive substances to diagnose or treat disease |
| noninvasive procedure | procedure that does not require entrance into a body cavity, tissue, or blood vessel |
| rate pressure product | systolic blood pressure multiplied by the heart rate |
| target heart rate |
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