Page 62 - Basic Monitoring in Canine and Feline Emergency Patients

Table 3.5. Continued.
VetBooks.ir Question Options What does this mean? Examples with rhythm diagnosis
Sinus rhythm
How are P
One P wave
waves
and QRS precedes every (electrical impulse
originated in SA
QRS complex
complexes at consistent node and conducted
related? P-R interval through AV node)

Sinus tachycardia

>1 P wave 2nd or 3rd degree AV
precedes QRS block
complexes
(at least
sometimes)

High-grade 2nd degree AV block (4:1 P:QRS ratio)

P waves are AV dissociation;
present but not suggests either
consistently ventricular ectopy or
related to QRS 3rd degree AV block
complexes

Ventricular tachycardia
No P waves Suggests atrial
present fibrillation or atrial
standstill

Atrial standstill
Do QRS-T QRS–T Past the AV node,
waveforms waveforms electrical impulse
look normal or normal was conducted
abnormal? using specialized
conduction system
(His bundle, bundle
branches, Purkinje
system)
Normal sinus rhythm with single supraventricular
premature complexes

54 J.L. Ward