The ECG pp 105-116 | Cite as

Fascicular Blocks

  • Marc Gertsch


The concept of fascicular blocks is based on the predominantly trifascicular infrahisarian ventricular conduction system, the right bundie branch on one side, and the left anterior and left posterior fascicle (forming the left bundle branch) on the other. The expression “fascicular block’ is a synonym of the older expression ‘hemiblock’. In some patients fascicular blocks progress to bifascicular/bilateral blocks and then to complete atrioventricular (AV) block. Thus they represent potential precursors of complete infrahissian AV block, which is generally associated with syncope and increased mortality.


Aortic Valve Disease Intraventricular Conduction Inferior Myocardial Infarction Inferior Infarction Endocardial Cushion Defect 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Marc Gertsch
    • 1
  1. 1.Department of Cardiology, Swiss Cardiovascular Center BernUniversity Clinic InselspitalBernSwitzerland

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