Left anterior fascicular block

Left anterior fascicular block
Left anterior fascicular block
Specialty	Cardiology

Left anterior fascicular block (LAFB) is an abnormal condition of the left ventricle of the heart,^[1]^[2] related to, but distinguished from, left bundle branch block (LBBB).

It is caused by only the left anterior fascicle – one half of the left bundle branch being defective. It is manifested on the ECG by left axis deviation. It is much more common than left posterior fascicular block.

^ Rebuzzi AG, Loperfido F, Biasucci LM (July 1985). "Transient Q waves followed by left anterior fascicular block during exercise". Br Heart J. 54 (1): 107–9. doi:10.1136/hrt.54.1.107. PMC 481860. PMID 4015909.
^ Chandrashekhar Y, Kalita HC, Anand IS (January 1991). "Left anterior fascicular block: an ischaemic response during treadmill testing". Br Heart J. 65 (1): 51–2. doi:10.1136/hrt.65.1.51. PMC 1024464. PMID 1899584.

[pmid4015909-1] Rebuzzi AG, Loperfido F, Biasucci LM (July 1985). "Transient Q waves followed by left anterior fascicular block during exercise". Br Heart J. 54 (1): 107–9. doi:10.1136/hrt.54.1.107. PMC 481860. PMID 4015909.

[pmid1899584-2] Chandrashekhar Y, Kalita HC, Anand IS (January 1991). "Left anterior fascicular block: an ischaemic response during treadmill testing". Br Heart J. 65 (1): 51–2. doi:10.1136/hrt.65.1.51. PMC 1024464. PMID 1899584.

[1]

[2]