ECG Tutorial

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Bundle Branch Block


Isolated dysfunction or damage of either of the main branches of the bundle of His is commonly observed in clinical practice. The pattern of ECG changes associated with right and left bundle branch block are predictable and you must be able to recognise them on the ECG. Complete right bundle branch block (RBBB) and complete left bundle branch block (LBBB) produce prolongation of the qrs complex and predictable morphological changes on the ECG.