AACN test DETAILED AND ELABORATED QUESTIONS AND
ANSWERS LATEST UPDATE 2026
Endocardium - Correct Answers inner layer of the heart
Myocardium - Correct Answers thick, middle layer of the heart
Epicardium - Correct Answers outer surface of the heart muscle
RCA - Correct Answers extends to the back of the heart and perfuses the posterior of the heart
ECG prep - Correct Answers alcohol before skin prep
Time it takes the paper to come out of the EKG machine? - Correct Answers 25 mm/s
Vertical axis - Correct Answers voltage--small box = 0.1 mv
Horizontal axis - Correct Answers time--small box = 0.4 sec
How often are tick marks? - Correct Answers every 3 seconds
Isoelectric line - Correct Answers electrical charges in the heart are equal
, 5 lead - Correct Answers smoke over fire, clouds over grass, brown in the middle
QT prolongation - Correct Answers - can cause torsades
- can be affected by drugs (antibiotics, Antidysrhythmic , antipsychotic drugs)
Atrial pacemaker fires... - Correct Answers before the P wave
Ventricular pacemaker fires... - Correct Answers before the QRS complex
Threshold - Correct Answers the lowest amount of energy needed to produce a "capture"
Failure to pace - Correct Answers no pacemaker activity, it is not firing. This could be a
sensitivity problem or a mechanical issue
Failure to capture - Correct Answers 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 - Correct Answers If the pacer spike is in the T wave, it is failure to sense
Over-sensing - Correct Answers - 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 - Correct Answers INCREASE the mV
Under-sensing - Correct Answers - the pacemaker is not sensitive enough
ANSWERS LATEST UPDATE 2026
Endocardium - Correct Answers inner layer of the heart
Myocardium - Correct Answers thick, middle layer of the heart
Epicardium - Correct Answers outer surface of the heart muscle
RCA - Correct Answers extends to the back of the heart and perfuses the posterior of the heart
ECG prep - Correct Answers alcohol before skin prep
Time it takes the paper to come out of the EKG machine? - Correct Answers 25 mm/s
Vertical axis - Correct Answers voltage--small box = 0.1 mv
Horizontal axis - Correct Answers time--small box = 0.4 sec
How often are tick marks? - Correct Answers every 3 seconds
Isoelectric line - Correct Answers electrical charges in the heart are equal
, 5 lead - Correct Answers smoke over fire, clouds over grass, brown in the middle
QT prolongation - Correct Answers - can cause torsades
- can be affected by drugs (antibiotics, Antidysrhythmic , antipsychotic drugs)
Atrial pacemaker fires... - Correct Answers before the P wave
Ventricular pacemaker fires... - Correct Answers before the QRS complex
Threshold - Correct Answers the lowest amount of energy needed to produce a "capture"
Failure to pace - Correct Answers no pacemaker activity, it is not firing. This could be a
sensitivity problem or a mechanical issue
Failure to capture - Correct Answers 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 - Correct Answers If the pacer spike is in the T wave, it is failure to sense
Over-sensing - Correct Answers - 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 - Correct Answers INCREASE the mV
Under-sensing - Correct Answers - the pacemaker is not sensitive enough
