Left anterior fascicular block
Criteria
Diagnostic criteria include[1]:
- Left axis deviation (-45 or more)
- QRS 80-110ms
- rS in II, III, and aVF
- qR in I and aVL
- Increased QRS voltage in the limb leads
LAFB vs LPFB[2]
LAFB | LPFB | |
Axis | Left axis deviation | Right axis deviation |
I and aVL | Upright QRS | Downgoing QRS |
III | Downgoing QRS | Upright QRS |
Significance
See Also
External Links
References
- ↑ Surawicz B, Knilans T. Chou’s Electrocardiography in Clinical Practice (6th edition), Saunders 2008.
- ↑ Mattu A and Brady WJ. ECG's for the Emergency Physician. BMJ Books. Sep 19, 2003.
- ↑ Mandyam MC, et al. Long-term outcomes of left anterior fascicular block in the absence of overt cardiovascular disease. JAMA. 2013; 309(15):1587-1588.