EKG EXAM 1 WITH CORRECT ANSWERS 2025

EKG EXAM 1 WITH CORRECT
ANSWERS 2025
1. 1st degree AV Normal sinus rhythm but PR interval is prolonged
block PR interval > .20 seconds - conduction is delayed at
AV node




2. 2nd degree AV More P waves than QRS
block Type 1 PR interval progressively increases in a cycle until P appears w/o QRS
(Wenckebach) occasional dropped beat
RR intervals not regular



3. 2nd degree AV More P waves than QRS
Block Type 2 PR interval is *consistent and
normal* multiple dropped
beats
QRS regular width


4. 3rd degree AV
More P waves than QRS;
block (complete
Sometimes the P waves are hidden within the T
heart block)
wave No pattern to PR interval, variable
R-R always regular
No atrial impulses are conducted through the AV node. Heart has regular atrial
activity and regular ventricular activity, but the activities are not coordinated with
each other.


5
. 1/
7

, Ventricular tachy- Tachycardic
rhythm
cardia No P waves
*Wide* QRS
May or may not have a pulse (one of the four pulse-less
rhythms)

6. Atrial flutter Regular rhythm and normal rate usually
P waves are present, but there are *extra ones*
Saw- tooth P waves
QRS normal




7. Sinus Bradycar- Bradycardic
dia rate Regular
rhythm
P waves are
8. PVC (Premature R-R interval
present for not regular (irregular rhythm)
Ventricular Con- each
AbsentQRS.PNo waves
traction) dropped
Wide QRSP greater than 0.12 seconds;
waves
notched and bizarre


9. atrial fibrillation Irregularly irregular
rhythm chaotic electrical
activity No obvious P
waves
No PR interval
QRS normal


1
0. 2/
8