EKG EXAM QUESTIONS WITH CORRECT ANSWERS 2025

EKG EXAM QUESTIONS WITH
CORRECT ANSWERS
2025
who invented the first EKG? ( correct answers ) Willem Einthoven

what is the rate of the SA node? ( correct answers )

60-100 bpm what is the rate of the AV node? ( correct

answers ) 40-60 bpm what is the rate of the ventricles?

( correct answers ) 20-40

bpm

what is the unique property that all cardiac cells have?
( correct answers ) automaticity

what is the name of the pathway between the SA node and AV
node?
( correct answers ) internodal pathway

what is the name of the pathway between the SA node and the left
atrium?
( correct answers ) Bachman's bundle

what is the term for when the atria contract which results in the last 30%
of ventricular filling? ( correct answers ) atrial kick

what percentage of ventricular filling is passive? ( correct answers )
70%

what wave of the EKG indicates depolarization of the atria? ( correct
answers ) P wave

what part of the EKG indicates depolarization of the ventricles? ( correct
answers )
QRS complex

what part of the EKG indicates repolarization of the ventricles? ( correct
answers ) T wave

what is
GRADED the normal length of the PRI? ( correct answers ) 0.12-0.20
A+
seconds

what is a normal time for the QRS complex? ( correct answers )
less than 0.12 seconds