Common Arrhythmias – Veterinary ECG Quiz

Dog (Recorded with Beecardia)

Question

Which rhythm best fits this tracing?

Sinus tachycardia

Sinus arrhythmia

Normal sinus rhythm

Atrial fibrillation

Dog - Standard Poodle (Recorded with Beecardia)

12 years • Male • Heart murmur and an arrhythmia noted on examination; echocardiogram consistent with stage B1 myxomatous mitral valve disease

Question

Which rhythm diagnosis best fits this tracing?

Atrial fibrillation

Sinus arrhythmia

Frequent atrial premature complexes

Second-degree atrioventricular block

Cat - Domestic mediumhair (Recorded with Beecardia)

5 months • Female

Question

How would you classify this rhythm?

Sinus arrhythmia

Atrial fibrillation

Sinus tachycardia

Supraventricular tachycardia

Dog - Japanese Spitz (Recorded with Beecardia)

11 years • Male • Stage C myxomatous mitral valve disease with left atrial enlargement and moderate pulmonary hypertension

Question

Which rhythm best describes this tracing?

Normal sinus rhythm

Atrial fibrillation

Sinus rhythm with ventricular premature complexes

Sinus rhythm with atrial premature complexes

Dog (Recorded with Beecardia)

Female

Question

Which rhythm diagnosis best fits this tracing?

Atrial fibrillation

Sinus arrhythmia

Atrial premature complexes

Second-degree AV block

Cat (Recorded with Beecardia)

Male

Question

Which finding best explains the premature beats interrupting the underlying rhythm?

Ventricular premature complexes

Sinus arrhythmia

Atrial premature complexes

Ventricular tachycardia

Cat - DSH (Recorded with Beecardia)

7 years • Male • Recheck evaluation of a cat with hypertrophic cardiomyopathy and a previously identified arrhythmia, currently maintained on antiarrhythmic therapy

Question

Which finding best explains the extra beats on this tracing?

Ventricular premature complexes

Atrial premature complexes

Escape beats

Artifact

Dog - Cocker Spaniel (Recorded with Beecardia)

11 years • Male

Question

Which finding on this tracing argues against sinus tachycardia?

The heart rate exceeds 180 beats per minute

During the fast runs, the rate is fixed with no beat-to-beat variation

Every QRS complex is narrow and uniform

The R-R interval is irregularly irregular

Cat - Domestic Shorthair (Recorded with Beecardia)

12 years • Female

Question

How concerning is the ventricular ectopy on this tracing, and why?

A single ventricular premature complex - an isolated, incidental finding

Sustained ventricular bigeminy for over 30 seconds - dense ectopy warranting follow-up

Occasional ventricular ectopy - a benign, low-burden pattern

A short run of ventricular tachycardia - concerning only if sustained

Dog - American Bulldog (Recorded with Beecardia)

7 years • Male

Question

Which of the following statements about this tracing is true?

This tracing shows supraventricular tachycardia, a fast, regular, narrow-QRS rhythm originating above the ventricles.

This tracing shows atrial fibrillation, an irregularly irregular, narrow-QRS rhythm with no organized P waves.

This tracing shows sinus tachycardia, a fast, regular, narrow-QRS rhythm driven by the sinus node.

This tracing shows ventricular tachycardia, a fast, regular, wide-QRS rhythm originating in the ventricles.

Quiz: Common Arrhythmias

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Quiz: Common Arrhythmias

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