EKG exam 1 questions with complete
solutions7
1st degree AV block - ANSWERS-Normal sinus rhythm but PR interval is prolonged
PR interval > .20 seconds - conduction is delayed at AV node
2nd degree AV block Type 1 (Wenckebach) - ANSWERS-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
2nd degree AV Block Type 2 - ANSWERS-More P waves than QRS
PR interval is *consistent and normal*
multiple dropped beats
QRS regular width
3rd degree AV block (complete heart block) - ANSWERS-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.
Ventricular tachycardia - ANSWERS-Tachycardic rhythm
No P waves
, *Wide* QRS
May or may not have a pulse (one of the four pulse-less rhythms)
Atrial flutter - ANSWERS-Regular rhythm and normal rate usually
P waves are present, but there are *extra ones*
Saw-tooth P waves
QRS normal
Sinus Bradycardia - ANSWERS-Bradycardic rate
Regular rhythm
P waves are present for each QRS. No dropped P waves
PVC (Premature Ventricular Contraction) - ANSWERS-R-R interval not regular (irregular rhythm)
Absent P waves
Wide QRS greater than 0.12 seconds; notched and bizarre
atrial fibrillation - ANSWERS-Irregularly irregular rhythm
chaotic electrical activity
No obvious P waves
No PR interval
QRS normal
Premature Atrial Contractions (PAC) - ANSWERS-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
solutions7
1st degree AV block - ANSWERS-Normal sinus rhythm but PR interval is prolonged
PR interval > .20 seconds - conduction is delayed at AV node
2nd degree AV block Type 1 (Wenckebach) - ANSWERS-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
2nd degree AV Block Type 2 - ANSWERS-More P waves than QRS
PR interval is *consistent and normal*
multiple dropped beats
QRS regular width
3rd degree AV block (complete heart block) - ANSWERS-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.
Ventricular tachycardia - ANSWERS-Tachycardic rhythm
No P waves
, *Wide* QRS
May or may not have a pulse (one of the four pulse-less rhythms)
Atrial flutter - ANSWERS-Regular rhythm and normal rate usually
P waves are present, but there are *extra ones*
Saw-tooth P waves
QRS normal
Sinus Bradycardia - ANSWERS-Bradycardic rate
Regular rhythm
P waves are present for each QRS. No dropped P waves
PVC (Premature Ventricular Contraction) - ANSWERS-R-R interval not regular (irregular rhythm)
Absent P waves
Wide QRS greater than 0.12 seconds; notched and bizarre
atrial fibrillation - ANSWERS-Irregularly irregular rhythm
chaotic electrical activity
No obvious P waves
No PR interval
QRS normal
Premature Atrial Contractions (PAC) - ANSWERS-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
