Obi Veterinary Education
Obi Veterinary Education
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Electrocardiology

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  1. Basics of ECG Interpretation
    11 Topics
  2. Normal ECG Parameters
  3. ECG Interpretation of Chamber Enlargement
    4 Topics
  4. Dysrhythmias
  5. Bradycardia
  6. Heart Block
    3 Topics
  7. Sick Sinus Syndrome
  8. Tachycardia
    8 Topics
  9. Hyperkalemia
  10. Myocardial Hypoxia/Ischemia
  11. Low Amplitude QRS Complex
  12. Wide QRS Complex
  13. Bundle Branch Block
  14. Differentials for ECG Abnormalities

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Electrocardiology ECG Interpretation of Chamber Enlargement Right Ventricular Enlargement
Lesson 3, Topic 4
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Right Ventricular Enlargement

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Dog:

  • Presence of an S wave in leads I, II, and III.
  • MEA in the frontal plane shifted to the right (pointing to the right ventricle): 100o to – 75o
  • Deep S wave in lead V3; S >= 0.7 mV
  • S>R in lead V3

If all 4 criteria are present, there is strong evidence of right ventricular enlargement. The presence of 1 or 2 criteria is still strongly suggestive of right ventricular enlargement

Cat: MEA in the frontal plane shifted to the right (points to the right ventricle): 160° to -75°

Right ventricular enlargement in a dog – slide bar to highlight abnormalities

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