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AACN test With Questions And Answers [distinction guaranteed]
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AACN test With Questions And Answers[distinction guaranteed]
Endocardium - Answer - inner layer of the heart
Myocardium - Answer - thick, middle layer of the heart
Epicardium - Answer - outer surface of the heart muscle
RCA - Answer - extends to the back of the heart and perfuses the posterior of the heart
ECG prep - Answer - alcohol before skin prep
Time it takes the paper to come out of the EKG machine? - Answer - 25 mm/s
Vertical axis - Answer - voltage--small box = 0.1 mv
Horizontal axis - Answer - time--small box = 0.4 sec
How often are tick marks? - Answer - every 3 seconds
Isoelectric line - Answer - electrical charges in the heart are equal
5 lead - Answer - smoke over fire, clouds over grass, brown in the middle
QT prolongation - Answer - - can cause torsades
, - can be affected by drugs (antibiotics, Antidysrhythmic , antipsychotic drugs)
Atrial pacemaker fires... - Answer - before the P wave
Ventricular pacemaker fires... - Answer - before the QRS complex
Threshold - Answer - the lowest amount of energy needed to produce a "capture"
Failure to pace - Answer - no pacemaker activity, it is not firing. This could be a sensitivity problem or a
mechanical issue
Failure to capture - Answer - the pacemaker is firing but no P wave or QRS complex follows the pacer
spike. The impulse is not strong enough to depolarize the heart (increasing the mA will troubleshoot this
problem)
Failure to sense - Answer - If the pacer spike is in the T wave, it is failure to sense
Over-sensing - Answer - - the pacemaker is too sensitive
- ex. pt is coughing and the pace maker thinks it's the pt's HR
- to decrease the sensitivity you must INCREASE the mV
too sensistive - Answer - INCREASE the mV
Under-sensing - Answer - - the pacemaker is not sensitive enough
- ex. fixed pace at 75 but pt is running up the stairs, their HR is climbing, and the pacemaker is not
picking it up
- to increase the sensitivity you must DECREASE the mV
Not sensitive enough - Answer - DECREASE the mV
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