EKG - Atrioventricular Heart Block

Question 1

If the _ is far from P, then what do we have?

Heart Block Poem

Answer 1

R is far from P
- first degree heart block

Question 2

Longer, longer, longer, drop
then what do we have?

Answer 2

Wenkenback

Question 3

If some ( ) dont get through,
then what do we have?

Answer 3

some Ps
- then we have Mobitz II

Question 4

If ( ) and ( ) don’t agree,
then what do we have?

Answer 4

Ps and Qs
- then we have a third degree

Question 5

How long is the PR interval of a 1st degree AV block?

Answer 5

0.30 seconds

Question 6

What is the reason for a longer PR interval for 1st degree AV block?

Answer 6

delay in transmission from the atria to the ventricles

Question 7

What is the characteristic of a second-degree AV block?

Answer 7

PR interval is constant but QRS is skipped

Question 8

What is another name for a 2nd degree AV block?

Answer 8

Mobitz Type II or Wenckeback

Question 9

What can a Mobitz Type II progress to?

Answer 9

Can rapidly progress to a complete heart block (3rd degree block)

Question 10

What is the characteristic of a 1st degree AV block?

Answer 10

A longer PR interval

Question 11

What is the characteristic of a 3rd degree AV block?

Answer 11

Complete heart block with no association between atrial and ventricular activity

Question 12

What is the cause of 1st degree AV block?

Answer 12

myocarditis
electrolyte imbalance
medication

Question 13

What is the cause of Mobitz type 2?

Answer 13

Cardiac injury
lyme disease
medications
valvular pathologies

Question 14

What is the cause of 3rd degree block?

Answer 14

hypoxia
organ damage

Question 15

What are the sx of 1st degree heart block?

Answer 15

may be asymptomatic

Question 16

What are the sx of a 2nd-degree heart block?

Answer 16

dizziness
syncope
palpitations (chest pain)
SOB
Fatigue
possible exercise tolerance

Question 17

What do we do for 1st degree heart block?

Answer 17

If asx = continue and monitor

Question 18

What are the sx of 3rd-degree heart block?

Answer 18

Really tired
irregular rhythm
Dizziness
Syncope
Cardiac arrest

Question 19

What do we do for a 2nd degree heart block?

Answer 19

reduce intensity and monitor
can get a pacemaker since it is unstable and can quickly get worse

We may not see them until the cause is fixed

Question 20

What do we do for a 3rd degree heart block?

Answer 20

we often don’t treat unless a pacemaker is placed

Question 21

What is the cause of an affected EKG for ischemia?

Answer 21

Decreased blood flow because of lower blood flow to the myocardium
- causes vasospasm, occlusion and thrombus

Question 22

What is the anomaly of an ischemia?

Answer 22

T-wave inversion

Question 23

What are the anomalies of a cardiac injury?

Answer 23

Acute injury = ST segment elevation

Question 24

If ST-segment is elevated, what is the possible prognosis?

Answer 24

acute onset of chest pain (hours) = cardiac emergency and immediate treatment ASAP

Question 25

What are the anomalies of a cardiac infarction?

Answer 25

can’t depolarize normally
can’t conduct an impulse
Q-wave changes are seen