Test 4: Heart Block

Question 1

First Degree HB

Answer 1

Wife @ home, husband home late every night

Always have p-wave
Long PR interval (>12 seconds)
Do nothing

Question 2

Second Degree HB

Answer 2

T1
- Wife @ home, husband comes home later and later until not home at all
- QRS is longer and longer, then missing
Needs work up*

T2/Mobile 2
- Husband sometimes comes home, sometimes does not, but when he does its the same time
- SA node fires but does not go anywhere
- More p-waves = NEEDS PACING

Question 3

Third Degree HB

Answer 3

Wifre not home, husband isn’t really home either
No communication, both marching at own rhythm

• QRS is wide and bizaar due to firing from ventricle
• NO t-wave
• Complete block
• Lots of p-waves, random QRS - usually slow HR

Needs pacing and perm PM