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Image Quiz: Common & Easily Mistaken ECG Rhythms

Brian A. Scansen, DVM, MS, DACVIM (Cardiology), Colorado State University

August 2016
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Peer Reviewed
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Web-Exclusive

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8  Questions
Multiple Choice Questions
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Image Quiz: Common & Easily Mistaken ECG Rhythms

Heart rate and rhythm disorders are commonly encountered in veterinary practice and appropriate recognition of these arrhythmias is needed to direct timely and accurate therapies. This quiz provides a pictorial review of arrhythmias seen in small animal practice, offering an opportunity to practice rapid image interpretation. 

Common Abbreviations

  • AV: Atrioventricular 
  • ECG: Electrocardiogram 
  • PAC: Premature atrial complex
  • PVC: Premature ventricular complex

Definitions

  • P wave: Waveform corresponding to atrial depolarization
  • PQ interval: Interval from onset of atrial depolarization to onset of ventricular depolarization; reflective of atrioventricular conduction time
  • QRS complex: Waveform corresponding to ventricular depolarization
  • T wave: Waveform corresponding to ventricular repolarization
Take this quiz by answering the following multiple choice questions.
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Clinician's Brief

Fig 1. Lead II ECG from a 16-year-old dog, recorded at 25 mm/sec paper speed and 20 mm/mV calibration.

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
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Clinician's Brief

 

 Figure 2. Lead II ECG from a 16-year-old dog, recorded at 25 mm/sec paper speed and 20 mm/mV calibration. 

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
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Clinician's Brief

 

Figure 3. Lead II ECG from a 10-year-old treeing feist dog recorded at 50 mm/sec paper speed and 10 mm/mV calibration. 

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
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Clinician's Brief

 

Figure 4. Lead II ECG from a West Highland white terrier, recorded at 25 mm/sec paper speed and 10 mm/mV calibration.

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
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Clinician's Brief

 

Figure 5. Leads I, II, and III from a 14-year-old domestic shorthair cat, recorded at 25 mm/sec paper speed and 20 mmm/mV calibration. 

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
6/8  Questions
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Clinician's Brief

 

Figure 6. Six lead ECG from a 3-year-old domestic shorthair cat, recorded at 50 mm/sec paper speed and 20 mm/mV calibration. 

What abnormality does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
7/8  Questions
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Clinician's Brief

Figure 7. Six lead ECG from an 8-year-old dog at 50 mm/sec paper speed and 10 mm/mV calibration. 

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
8/8  Questions
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Clinician's Brief

 

Figure 8. Lead II ECG from a 9-year-old dog recorded at 25 mm/sec paper speed and 20 mm/mV calibration. 

What rhythm does this ECG demonstrate?

Select one of the above choices and click submit.
Image Quiz: Common & Easily Mistaken ECG Rhythms
8/8  Questions
Multiple Choice Questions
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Image Quiz: Common & Easily Mistaken ECG Rhythms

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