Conduction disorders

Question 1

400 - 600 f-waves per minute
Irreg Irreg
Cause Irreg vent activity

Answer 1

A. fib

Question 2

250 - 350 f-waves per minute
Regular
Cause vent activity in 2:1, 3:1, 4:1

Answer 2

A. flutter

Question 3

160 - 220 p-waves per minute
Regular
Vent response 1:1

Answer 3

SVT / PSVT

Question 4

60 - 100 p-waves per min
Regular
Vent response 1:1
PR normal

Answer 4

NSR

Question 5

< 60 p-waves per min
Regular
Vent response 1:1

Answer 5

Sinus brady

Question 6

> 100 p-waves per min
Regular
Vent response 1:1

Answer 6

Sinus tachy

Question 7

Atrial ectopic activity causes p-wave and p’-wave (random), but overall regular and 1:1
p’-wave has different morphology
QRS is narrow

Answer 7

PAC

Question 8

Ventricular ectopic activity
Random extra QRS that is wide (diff morph than other QRS complexes)
Overall regular and 1:1

Answer 8

PVC

Question 9

100 - 250 ventricular rate
Regular
P waves may (may not) be visible
QRS is wide
> 3 PVCs in a row =

Answer 9

V. tach

looks like series of mountains all the same height; if polymorphic “twisting” = Torsades

Question 10

Chaotic rhythm

Coarse vs fine

Answer 10

V. fib

Question 11

Fixed prolonged PR (>0.20)

Answer 11

1 deg AV block

Question 12

PR progressively longer until drops QRS

Disease of AV node

Answer 12

2 deg AV block (Mobitz Type 1)

Wenkebach - wink with 1 eye

Question 13

PR fixed, ? prolonged, randomly drops QRS

Disease of His-Purkinje System

Answer 13

2 deg AV block (Mobitz Type 2)

Question 14

P-waves regular - independent rhythm of QRS (also regular and independent of P-waves)
P-waves faster

Answer 14

3 deg AV block