<unk>  is caused by interruption of the<unk>  division of the left bundle branch. This fascicle is fragile, easily  exposed to damage, and has a single blood supply (the left<unk>  descending coronary artery).
Left anterior fascicular block
Left posterior fascicular block
Fascicular VT
Bundle branch block
Atrioventricular dissociation
Mahaim type preexcitation
Pre-excitation syndrome
Left bundle branch block