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Left Posterior Fascicular Block aka Left Posterior Hemiblock |
Findings:
| 1. | vertical or rightward axis of at least 60 degrees with qR in II, III and aVF and R III always > R II |
| 2. | delayed intrinsicoid deflection in aVF > 45 ms, or slurred downstroke of R aVF and sometimes V6 also |
| 3. | often secondary T waves: negative in II, III and aVF and upright in 1 and aVL |
| 4. | other causes of right axis deviation must be excluded |