Rhythm Abnormalities

Question 1

Criteria for AV/Junctional rhythm.

Answer 1

40-60 bpm
narrow QRS
P inverted
Regular

Question 2

Criteria for ventricular pacemaker- Purkinje.

Answer 2

Regular
15-40 bpms
Wide, Notched QRS
More Ps
T in opposite directions.

Question 3

Criteria for ventricular pacemaker- bundle of his.

Answer 3

Regular
40-60 bpm
QRS borderline
More Ps

Question 4

Compare Single and multifocal Atrial Tachycardia.

Answer 4

Single
1 abN P shape, fast and regular,

Mulitfocal
Variety, fast and irregular

both QRS complexes are narrowed.

Question 5

Compare monomorphic and polymorphic Ventricular Tachycardia.

Answer 5

M:
Regular
Wide identical QRs
Occasional P wave
P:
Irregular
Wide mixed QRS
Seldom P wave

Both are fast,

Question 6

Atrial Flutter

Answer 6

Single circuit
sawtooth, regular, narrow QRS and Block 2:1, 3:1

Question 7

Atrial Fibrillation

Answer 7

Multiple circuits
Squiggly baseline (P waves), irregular (R-R interval) and narrow QRS

Question 8

Difference between a MAT and Atrial Fibrillation.

Answer 8

One is ectopic and the other is Re-entry
MAT has p wave before QRS
and the A FIb doesn’t.

Question 9

AVNRT

Answer 9

Very fast
regular
narrow QRS and short PR

Question 10

AVRT

Answer 10

Fast
regular
narrow or wide
Short PR
delta