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Left anterior fasicular block
- QRS duration 0.10 to 0.11 s
- Left axis deviation usually greater than 60 degrees
- Small r wave in II, III, and aVF
- Small q wave in I and aVL
- QRS duration 0.10 to 0.11
- Frontal QRS axis rightward of +90 degrees absent other causes of right axes deviation such as cor pulmonale.
