AACN ECG WRITTEN EXAM

AACN ECG WRITTEN EXAM ACTUAL EXAM 100 QUESTIONS
AND CORRECT DETAILED ANSWERS WITH RATIONALES (100%
VERIFIED ANSWERS)
1 small box on horizontal axis= ? seconds; 1 large box? - ANSWER: 0.04; 0.2

The vertical axis represents: - ANSWER: voltage and amplitude

interval between 2 tick marks on top of ECG strip? - ANSWER: 3 seconds

P wave represents what? - ANSWER: atrial depolarization (contraction)

QRS complex represents what? - ANSWER: ventricular depolarization/contraction
(atrial repolarization too but can't see because hidden in QRS complex)

normal PR interval - ANSWER: 0.12-0.20 seconds

T wave represents what? - ANSWER: ventricular repolarization (relaxation)

normal duration of QT interval - ANSWER: 0.36-0.44 seconds

RR interval represents - ANSWER: ventricular rhythm

PP interval represents - ANSWER: atrial rhythm

calculating rate for regular rhythms - ANSWER: 300 divide by # of large boxes
between RR (ventricular rate) or PP (atrial rate) waves

calculating rate for irregular rhythms - ANSWER: (# or P or R waves on a 6 sec strip)
x 10

Normal QRS duration - ANSWER: 0.04-0.12 seconds

Normal ventricular rate - ANSWER: 60-100bpm

Normal atrial rate - ANSWER: 60-100 bpm

in normal conduction, all electrical impulses originate in the AKA what is the primary
pacemaker of the heart? - ANSWER: SA node

options for immediate treatment of symptomatic sinus bradycardia? - ANSWER:
atropine, epinephrine, transcutaneous pacing

treatment for sinus tachy - ANSWER: fluids, blood replacement and stop bleeding if
hemorrhaging, beta blockers, calcium channel blockers