EKG exam 1 Questions and
Answers Verified Solutions
Latest Update (2026/2027)
Question:
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Normal sinus rhythm but PR interval is prolonged
PR interval >.20 seconds - conduction is delayed at AV node
Choose an answer
2nd degree AV block Type 1
1st degree AV block
(Wenckebach)
Atrial flutter
normal sinus rhythm
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Terms in this set (35)
1st degree AV block
Normal sinus rhythm but PR interval is prolonged
PR interval >.20 seconds - conduction is delayed at
AV node
2nd degree AV block Type 1
More P waves than QRS
(Wenckebach)
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
More P waves than QRS
PR interval is consistent and normal
multiple dropped beats
, QRS regular width
3rd degree AV block (complete
More P waves than QRS;
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.
Tachycardic rhythm
Ventricular tachycardia
No P waves
Wide QRS
May or may not have a pulse (one of the four
pulse-less rhythms)
Atrial flutter
Regular rhythm and normal rate usually
P waves are present, but there are extra ones
Saw-tooth P waves
QRS normal
Bradycardic rate
Sinus Bradycardia
Regular rhythm
P waves are present for each QRS. No dropped P
waves
PVC (Premature Ventricular
R-R interval not regular (irregular rhythm)
Absent P waves
Contraction)
Wide QRS greater than 0.12 seconds; notched and
bizarre
Irregularly irregular rhythm
atrial fibrillation
Answers Verified Solutions
Latest Update (2026/2027)
Question:
Learn
Study with Learn
Normal sinus rhythm but PR interval is prolonged
PR interval >.20 seconds - conduction is delayed at AV node
Choose an answer
2nd degree AV block Type 1
1st degree AV block
(Wenckebach)
Atrial flutter
normal sinus rhythm
Don't know?
Terms in this set (35)
1st degree AV block
Normal sinus rhythm but PR interval is prolonged
PR interval >.20 seconds - conduction is delayed at
AV node
2nd degree AV block Type 1
More P waves than QRS
(Wenckebach)
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
More P waves than QRS
PR interval is consistent and normal
multiple dropped beats
, QRS regular width
3rd degree AV block (complete
More P waves than QRS;
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.
Tachycardic rhythm
Ventricular tachycardia
No P waves
Wide QRS
May or may not have a pulse (one of the four
pulse-less rhythms)
Atrial flutter
Regular rhythm and normal rate usually
P waves are present, but there are extra ones
Saw-tooth P waves
QRS normal
Bradycardic rate
Sinus Bradycardia
Regular rhythm
P waves are present for each QRS. No dropped P
waves
PVC (Premature Ventricular
R-R interval not regular (irregular rhythm)
Absent P waves
Contraction)
Wide QRS greater than 0.12 seconds; notched and
bizarre
Irregularly irregular rhythm
atrial fibrillation
