Rhythm Interpretation – Veterinary ECG Quiz

Dog - Pomeranian (Recorded with Beecardia)

13 years • Male

Question

Which rhythm diagnosis best fits this tracing?

Sinus arrhythmia with wandering atrial pacemaker

Atrial fibrillation with an irregular ventricular response

Sick sinus syndrome with intermittent sinus pauses

Sinus arrhythmia with frequent atrial premature complexes

Dog - Labrador Retriever (Recorded with Beecardia)

12 years • Male

Question

Is the rhythm sinus throughout, or is a second focus at work?

Sinus tachycardia with frequent atrial premature complexes

Sinus tachycardia interrupted by ventricular ectopy

Sustained monomorphic ventricular tachycardia

Sinus tachycardia with no ectopic complexes

Dog (Recorded with Beecardia)

12 years

Question

Which interpretation best fits this recording?

Sinus rhythm with atrial premature complexes, some non-conducted

Sinus rhythm with ventricular premature complexes

Sinus arrhythmia with intermittent sinus pauses

Sinus rhythm with second-degree AV block dropping sinus beats

Dog - Miniature Schnauzer (Recorded with Beecardia)

3 years • Female • ECG recorded during a diagnostic procedure

Question

Which diagnosis fits the rhythm that persists through most of this recording?

Supraventricular tachycardia

Sinus tachycardia

Atrial flutter

Atrial fibrillation

Dog - Staffordshire (Recorded with Beecardia)

14 years • Female • Presented following syncope

Question

The underlying rhythm here is sinus bradycardia. What is the mechanism of the other beats in this tracing?

Premature beats from an ectopic atrial focus

Sinus beats resuming after a nonconducted P wave

Escape beats arising from the AV junction

Escape beats arising from a ventricular focus

Dog (Recorded with Beecardia)

Female

Question

Second-degree AV block is present on this recording. Which feature on the tracing establishes which type of second-degree block it is?

Progressive PR-interval lengthening in the beats before the blocked P wave

Two or more consecutive blocked P waves producing a prolonged pause

Absence of progressive PR lengthening in the beats before the blocked P wave

Uniformly wide QRS complexes on the conducted sinus beats

Dog - Golden Retriever (Recorded with Beecardia)

7 years • Male

Question

How would you classify this rhythm?

Marked sinus arrhythmia

Atrial flutter with variable AV conduction

Sinus rhythm with frequent atrial premature complexes

Atrial fibrillation

Cat - DSH (Recorded with Beecardia)

12 years • Male

Question

Ventricular ectopy is present in this recording. Which assessment of that ectopy is most appropriate?

Isolated single ectopic beats on a sinus background - a low-burden, uncomplicated pattern

Frequent ectopy grouped into couplets and triplets - a complex, higher-risk pattern

Repeated runs of nonsustained ventricular tachycardia - an urgent ventricular arrhythmia

Ventricular bigeminy through much of the recording - dense, sustained ectopy

Dog - Labrador (Recorded with Beecardia)

9 years

Question

Apart from the isolated ectopy, this recording repeatedly shows runs of several consecutive, uniform wide beats. How should those runs be classified?

Ventricular tachycardia

Ventricular escape rhythm

Intermittent bundle branch block

Accelerated idioventricular rhythm

Dog (Recorded with Beecardia)

11 years • Male

Question

What is the most appropriate next step for this patient?

Rate-control the atrial fibrillation and recheck an ECG in one week.

Initiate monitored antiarrhythmic management for the ventricular tachycardia while continuing rate control for the atrial fibrillation.

Fit an outpatient Holter to quantify the ectopy before starting antiarrhythmic therapy.

Perform echocardiography first and defer antiarrhythmic decisions until the results are available.

Quiz: Rhythm Interpretation

Report a problem

Quiz: Rhythm Interpretation

Your result