CRAT Study Guide
3 types of pacemakers - correct answer-1) single (either RA or RV)
2) dual chamber (RA and LV)
3) bi-ventricular (RV and LV --> Congestive Heart Failure)
A-V sequential pacing - correct answer-When the pacemaker paces both the atrium and the
ventricle
Amplitude for one small box - correct answer-?
Cardioversion vs. Defibrillation - correct answer-Cardioversion: to change the heart rhythm
(usually from SVT to sinus)
Defibrillation: only used for pulseless VT and v-fib
Causes of 60-cycle interference - correct answer-Electrodes not properly applied, EKG
machine not properly grounded, r by too many electrical devices nearby.
Causes of somatic tremor artifact - correct answer-Patient keeps moving, Parkinson's
disease
Causes of wandering baseline - correct answer-Respiration or by lotion/sweat on the skin
interfering with the signal
Chart speed - correct answer-25 mm/s
Define intrinsic beats - correct answer-The patient's own heart beat
Failure to capture (loss of capture) - correct answer-No P or QRS after the pacemaker spike
Failure to sense - correct answer-Lack of pacemaker spikes where they should have been.
Battery can be dead.
Gain - correct answer-Normally set to 1
How to fix 60-cycle interference - correct answer-Unplug and re-plug somewhere else.
How to fix somatic tremor artifact - correct answer-Make sure leads are not placed over
muscle and instead placed on bone, help patient relax, give a blanket.
Lead I connects what? - correct answer-Right arm to left arm
Lead I, II, and III are what kind of leads? - correct answer-Bipolar (also frontal because they
only show the front of the heart)
3 types of pacemakers - correct answer-1) single (either RA or RV)
2) dual chamber (RA and LV)
3) bi-ventricular (RV and LV --> Congestive Heart Failure)
A-V sequential pacing - correct answer-When the pacemaker paces both the atrium and the
ventricle
Amplitude for one small box - correct answer-?
Cardioversion vs. Defibrillation - correct answer-Cardioversion: to change the heart rhythm
(usually from SVT to sinus)
Defibrillation: only used for pulseless VT and v-fib
Causes of 60-cycle interference - correct answer-Electrodes not properly applied, EKG
machine not properly grounded, r by too many electrical devices nearby.
Causes of somatic tremor artifact - correct answer-Patient keeps moving, Parkinson's
disease
Causes of wandering baseline - correct answer-Respiration or by lotion/sweat on the skin
interfering with the signal
Chart speed - correct answer-25 mm/s
Define intrinsic beats - correct answer-The patient's own heart beat
Failure to capture (loss of capture) - correct answer-No P or QRS after the pacemaker spike
Failure to sense - correct answer-Lack of pacemaker spikes where they should have been.
Battery can be dead.
Gain - correct answer-Normally set to 1
How to fix 60-cycle interference - correct answer-Unplug and re-plug somewhere else.
How to fix somatic tremor artifact - correct answer-Make sure leads are not placed over
muscle and instead placed on bone, help patient relax, give a blanket.
Lead I connects what? - correct answer-Right arm to left arm
Lead I, II, and III are what kind of leads? - correct answer-Bipolar (also frontal because they
only show the front of the heart)
