Basic Dysrhythmia Exam 2026

Basic Dysrhythmia

1.Sinus Rhythm: 60-100bpm
Present P-wave
PRI 0.12-0.20 seconds
QRS 0.12> seconds
2.Sinus Bradycardia: 40-60bpm
Present P-wave
PRI 0.12-0.20 seconds
QRS 0.12> seconds
3.Sinus Tachycardia: 100-160bpm
Present P-wave
PRI 0.12-0.20 seconds
QRS 0.12> seconds
4.Sinus arrhythmia: Irregular
Normal or slow
Present P-Wave
PRI 0.12-0.20 seconds
QRS 0.12> seconds
5.Sinus Arrest/Exit block: Regular rhythm w/
pause
P-wave not seen until next complex
6.Atrial Fibrillation (A-Fib): Grossly irregular
400< ventricular varies

Wavy P-wave
PRI not measureable
QRS 0.12> seconds
7.Atrial Flutter: Regular or Irregular
250-400 (depending on conduction)




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, Basic Dysrhythmia

"Saw-tooth" P-waves PRI not
measureable
QRS 0.12> seconds
8.Paced Atrial: "Spike" before P-wave


9.1° AVB: Rate determined by rhythm
1 P-wave to each QRS
PRI prolonged >0.20 seconds
QRS 0.10>
10. 2° AVB Type I (Wenkebach): "Long, Long, Longer, Dropped... then you have a
Wenkebach" Persistent P-waves until not included
PRI progressively lengthen
QRS 0.10>
11. 2° AVB Type II (Mobitz): Irregular ventricular
P-wave before each QRS until no QRS
PRI normal until no QRS
QRS 0.10>
12. 2° AVB 2:1: Every other beat has a lone P-wave
13. 3° AV Block (Complete Heart Block): P-save has no relation to QRS

PRI varies greatly
QRS normal-wide
14. Bundle Branch Block (BBB): Rate determined by rhythm
Normal P-wave
PRI 0.12-0.20
QRS wide 0.12<
15. Bigeminy: every other beat is premature




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