USMC CACO EXAM QUESTIONS WITH 100% SOLVED CORRECT ANSWERS.

MAYO ECG
PR interval represents: - CORRECT ANSWER-electrical conduction time from the atria
to the AV node

Is atrial flutter benign? - CORRECT ANSWER-no

PR interval - CORRECT ANSWER-.12-.20

QRS interval - CORRECT ANSWER-<.12

What lead do you look at - CORRECT ANSWER-V1

Interventions - CORRECT ANSWER-assess the patient

QRS wave - CORRECT ANSWER-ventricular depolarization

P wave - CORRECT ANSWER-atrial depolarization

AV node purpose - CORRECT ANSWER-delays impulse from atria before it moves to
the ventricles

Where do you place the lead? - CORRECT ANSWER-right sternal border, 4th
intercostal space L!

Rhythm with only p waves - CORRECT ANSWER-Ventricular standstill

SA node - CORRECT ANSWER-the node consisting of specialized cells capable of
automaticity at a rate of 60-100

Sinus Tachycardia - CORRECT ANSWER-a rhythm characterized by 100-160 beats per
minute

Automaticity - CORRECT ANSWER-the ability of the cell to spontaneously initiate an
impulse

Normal SR - CORRECT ANSWER-Impulse that initiates within the SA node at a rate of
60-100 bpm

Escape Rhythm or beat - CORRECT ANSWER-when the sinus node fails and a lower
pacemaker takes over