EKG EXAMS WITH CORRECT
ANSWERS /MULTIPLE CHOICE
1. 1st degree AV block - ANSWER-Normal sinus rhythm but PR
interval is prolonged
PR interval > .20 seconds - conduction is delayed at AV node
2. 2nd degree AV block Type 1 (Wenckebach) - ANSWER-More P
waves than QRS
PR interval progressively increases in a cycle until P appears
w/o QRS
occasional dropped beat
RR intervals not regular
3. 2nd degree AV Block Type 2 - ANSWER-More P waves than QRS
PR interval is *consistent and normal*
multiple dropped beats
QRS regular width
4. 3rd degree AV block (complete heart block) - ANSWER-More P
waves than QRS;
Sometimes the P waves are hidden within the T 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. Ventricular tachycardia - ANSWER-Tachycardic rhythm
No P waves
*Wide* QRS
May or may not have a pulse (one of the four pulse-less
rhythms)
, 6. Atrial flutter - ANSWER-Regular rhythm and normal rate
usually
P waves are present, but there are *extra ones*
Saw-tooth P waves
QRS normal
7. Sinus Bradycardia - ANSWER-Bradycardic rate
Regular rhythm
P waves are present for each QRS. No dropped P waves
8. PVC (Premature Ventricular Contraction) - ANSWER-R-R
interval not regular (irregular rhythm)
Absent P waves
Wide QRS greater than 0.12 seconds; notched and bizarre
9. atrial fibrillation - ANSWER-Irregularly irregular rhythm
chaotic electrical activity
No obvious P waves
No PR interval
QRS normal
10. Premature Atrial Contractions (PAC) - ANSWER-Regularly
irregular
P waves present for each QRS, but are early and upright,
different from sinus
PR: 0.12-0.20 seconds; different from sinus
Ventricular fibrillation (V-fib) - ANSWER-Disorganized, ineffective
twitching of the ventricles, resulting in no blood flow and a state
of cardiac arrest.
No pulse. Can be coarse or fine.
ANSWERS /MULTIPLE CHOICE
1. 1st degree AV block - ANSWER-Normal sinus rhythm but PR
interval is prolonged
PR interval > .20 seconds - conduction is delayed at AV node
2. 2nd degree AV block Type 1 (Wenckebach) - ANSWER-More P
waves than QRS
PR interval progressively increases in a cycle until P appears
w/o QRS
occasional dropped beat
RR intervals not regular
3. 2nd degree AV Block Type 2 - ANSWER-More P waves than QRS
PR interval is *consistent and normal*
multiple dropped beats
QRS regular width
4. 3rd degree AV block (complete heart block) - ANSWER-More P
waves than QRS;
Sometimes the P waves are hidden within the T 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. Ventricular tachycardia - ANSWER-Tachycardic rhythm
No P waves
*Wide* QRS
May or may not have a pulse (one of the four pulse-less
rhythms)
, 6. Atrial flutter - ANSWER-Regular rhythm and normal rate
usually
P waves are present, but there are *extra ones*
Saw-tooth P waves
QRS normal
7. Sinus Bradycardia - ANSWER-Bradycardic rate
Regular rhythm
P waves are present for each QRS. No dropped P waves
8. PVC (Premature Ventricular Contraction) - ANSWER-R-R
interval not regular (irregular rhythm)
Absent P waves
Wide QRS greater than 0.12 seconds; notched and bizarre
9. atrial fibrillation - ANSWER-Irregularly irregular rhythm
chaotic electrical activity
No obvious P waves
No PR interval
QRS normal
10. Premature Atrial Contractions (PAC) - ANSWER-Regularly
irregular
P waves present for each QRS, but are early and upright,
different from sinus
PR: 0.12-0.20 seconds; different from sinus
Ventricular fibrillation (V-fib) - ANSWER-Disorganized, ineffective
twitching of the ventricles, resulting in no blood flow and a state
of cardiac arrest.
No pulse. Can be coarse or fine.
