Dysrhythmia

Question 0

Sinus tachycardia

Answer 0

More frequent impulse discharge from the SA node than NSR
HR: >100 bpm
Rhythm: regular
P, P-R, QRS: all normal

Question 1

Sinus bradycardia

Answer 1

Slow impulse discharge from the SA node
HR <60 bpm
Rhythm: regular
P, P-R, QRS: all normal

Question 2

Sinus arrhythmia

Answer 2

Irregular discharge from the SA node with an irregular R-R interval
HR: 60-100 bpm
Rhythm: irregular
Distance between shortest R-R and longest R-R is >0.12 sec
P, P-R, QRS: all normal

Question 3

Sinus arrest/ sinus pause

Answer 3

SA node fails to discharge, then resumes
Electrical activity resumes either when SA node resets itself or when a lower latent pacemaker begins to discharge. 
The pause/arrest time interval is not a multiple of the normal P-P interval
Rate: normal to slow
P: normal except in area of pause/arrest
Rhythm: irregular whenever pause occurs
PR: normal
QRS: normal

Question 4

SA block

Answer 4

The block results in a dropped beat that is a multiple of the P-P interval, after that dropped beat, the rhythm continues regularly.
P: normal, except in areas of dropped beats
Rhythm: irregular whenever SA block occurs
PR: normal
QRS: normal

Question 5

Name the 5 SA node arrhythmias

Answer 5

S. Bradycardia
S. Tachycardia
S. Arrhythmia
S. Arrest/ pause
SA block

Question 6

Name the 8 atrial arrhythmias

Answer 6

• Wandering pacemaker
• Premature atrial contraction (PAC)
• Atrial tachycardia
• Supra ventricular tachycardia (SVT)
• Paroxysmal supra ventricular tachycardia (PSVT)
• Atrial flutter
• Atrial fibrillation
• Wolff-parkinson-white syndrome (WPW)