EKG exam 1 complete questions and answers | verified 2026
1. 1st degree
AV block
5.
2. 2nd degree
AV block
Type 1
(Wenckebac
h)
3. 2nd degree
AV Block
Type 2
4. 3rd degree
AV block
(complete
heart block)
1/
7
, EKG exam 1 complete questions and answers | verified 2026
Normal sinus rhythm but l is *consistent and normal*
PR interval is prolonged multiple dropped beats
PR interval > .20 seconds QRS regular width
- conduction is delayed at
AV node
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
More P waves than QRS regular atrial activity and regular ventricular activity, but the activities are
PR interval not coordinated with each other.
progressively
increases in a cycle
until P appears w/o
QRS occasional
dropped beat
RR intervals not regular
More P waves than QRS
P
R
i
n
t
e
r
v
a
1/
7
1. 1st degree
AV block
5.
2. 2nd degree
AV block
Type 1
(Wenckebac
h)
3. 2nd degree
AV Block
Type 2
4. 3rd degree
AV block
(complete
heart block)
1/
7
, EKG exam 1 complete questions and answers | verified 2026
Normal sinus rhythm but l is *consistent and normal*
PR interval is prolonged multiple dropped beats
PR interval > .20 seconds QRS regular width
- conduction is delayed at
AV node
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
More P waves than QRS regular atrial activity and regular ventricular activity, but the activities are
PR interval not coordinated with each other.
progressively
increases in a cycle
until P appears w/o
QRS occasional
dropped beat
RR intervals not regular
More P waves than QRS
P
R
i
n
t
e
r
v
a
1/
7
