Fast or Slow? – Veterinary ECG Quiz

Dog - Cockapoo (Recorded with Beecardia)

9 years • Male

Question

Which rhythm diagnosis best fits this tracing?

Sinus rhythm

Sinus tachycardia

Sinus arrhythmia

Sinus bradycardia

Cat (Recorded with Beecardia)

An irregular heart rhythm was noted on auscultation during a routine consultation

Question

Before calling this heart rate abnormal, what should you check first?

Average the rate over a longer stretch of the recording

Compare the rate with the resting range expected in a dog

Compare the rate against the normal range for this species

Check whether the rate varies with respiration

Dog (Recorded with Beecardia)

Female

Question

Which rhythm diagnosis best fits this tracing?

Third-degree AV block

Sinus bradycardia

Sinus arrest

Atrial standstill

Cat - Domestic Shorthair (Recorded with Beecardia)

3 years

Question

Which rhythm best explains this tracing?

Normal sinus rhythm

Sinus tachycardia

Atrial fibrillation

Supraventricular tachycardia

Dog - Golden Retriever mix (Recorded with Beecardia)

10 years • Female • Previously diagnosed with dilated cardiomyopathy, thought to be diet-associated; occasional coughing noted

Question

Which diagnosis best fits the ventricular rate and rhythm on this tracing?

Atrial fibrillation

Sinus arrhythmia

Supraventricular tachycardia

Frequent atrial premature complexes

Dog (Recorded with Beecardia)

12 years • Pre-anesthetic (pre-op) ECG evaluation

Question

Which rhythm best fits this tracing?

Atrial fibrillation

Second-degree AV block

Sinus arrhythmia

Sinus rhythm with atrial premature complexes

Dog - Boxer Mix (Recorded with Beecardia)

1 year • Male • Recheck for congestive heart failure due to dilated cardiomyopathy, currently on cardiac medications

Question

How would you classify this rhythm?

Sinus tachycardia

Supraventricular tachycardia

Ventricular tachycardia

Atrial fibrillation

Dog - Miniature Schnauzer (Recorded with Beecardia)

10 years • Female

Question

Which finding shows that the QRS complexes are not being conducted from the atria?

A constant, normal PR interval preceding every QRS complex

Progressive PR lengthening before an occasional dropped QRS complex

An irregularly irregular ventricular response with no discernible P waves

P waves marching independently of the QRS complexes

Dog - Jack Russell Terrier (Recorded with Beecardia)

11 years • Female • Confirmed ACVIM Stage C mitral valve disease with an enlarged left atrium; history of episodic collapse (syncope)

Question

Given the history of collapse, how should this rhythm finding be interpreted?

Clinically significant sinus node dysfunction that warrants further cardiac work-up

Second-degree AV block - trial atropine and recheck the ECG

Bradycardia caused by the mitral valve disease - adjust the cardiac medications

An incidental, benign finding needing no further investigation

Dog (Recorded with Beecardia)

12 years • Male • Recheck ECG during ongoing management of atrial fibrillation; no respiratory difficulty reported at home

Question

Which finding on this tracing is the most urgent concern?

Atrial fibrillation - chronic and manageable on the current routine

Sinus tachycardia - physiologic and not a cause for concern

Ventricular premature complexes - benign and needs no action

Ventricular tachycardia - clinically significant and requires prompt treatment escalation

Quiz: Fast or Slow?

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Quiz: Fast or Slow?

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