ECG's Made Easy/ Barbara Aehlert/Pacemaker Rhythms Chapter 8 Study Test.

ECG's Made Easy/ Barbara Aehlert/Pacemaker Rhythms Chapter 8 Study Test. 1. Demand pacemaker Pacemaker that discharge only when the patient's heart rate drops below the preset rate 2. Failure to capture A pacemaker malfunction that occurs when the artificial pacemaker stimulus is unable to depolarize the myocardium/heart 3. Failure to pace A pacemaker malfunction that occurs when the pacemaker fails to deliver an electrical stimulus at its programmed time. 4. Fixed-rate pacemaker Pacemaker that continuously discharges at a preset rate regardless of the patient's intrinsic activity 5. Oversensing A pacemaker malfunction that results from inappropriate sensing of extra- neous electrical signals 6. Sensitivity The extent to which an artificial pacemaker recognizes intrinsic cardiac electrical activity 7. Threshold The minimum amount of voltage needed to obtain consistent capture 8. Pacemaker system consists of a pulse generator( the power source) and pacing leads. 9. Pacing lead Carries information about the heart's electrical activity back to the pacemak- er. 10. Symptoms that may result from decrease in Cardiac Output 11. Acutely altered Lightheadedness Mental status Palpitations Dizziness Pulsations in the neck Exercise intolerance Seizures Fainting Shortness of breath Fatigue Tightness in chest Heart failure Implantable Cardioverter-Defibril- lators(ICD's) 12. Dual-Chamber Pace- makers 13. A single-chamber pacemakers Store information about the activities of the patient's heart, as well as information about the device itself. Uses 2 leads: One lead is places in the right atrium and the other in the right ventricle/ Truck that has dual pipes therefore 2 pacemakers firing ott Paces the ventricles but it cannot coordinate pacing