- Basics of ECG Interpretation11 Topics
- Normal ECG Parameters
- ECG Interpretation of Chamber Enlargement4 Topics
- Dysrhythmias
- Bradycardia
- Heart Block3 Topics
- Sick Sinus Syndrome
- Tachycardia8 Topics
- Hyperkalemia
- Myocardial Hypoxia/Ischemia
- Low Amplitude QRS Complex
- Wide QRS Complex
- Bundle Branch Block
- Differentials for ECG Abnormalities
Lesson 3, Topic 1
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Large P waves
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- An electrocardiographic criterion of left atrial enlargement is a P wave that is too wide in lead II.
- Dog: P > 0.04 sec
- Cat: P > 0.04 sec
- An electrocardiographic criterion of right atrial enlargement is a P wave that is too tall in lead II.
- Dog: P > 0.4 mv
- Cat: P > 0.2 mv
- An electrocardiographic criterion of biatrial enlargement is a P wave that is too tall and too wide in lead II.
Comment: The sensitivity and specificity of the ECG criteria for atrial enlargement are low.
