bundle branch block

bundle branch block is a topic covered in the Taber's Medical Dictionary.

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ABBR: BBB A defect in the electrical conduction system of the heart in which there is failure of conduction down one of the main branches of the bundle of His. On the surface electrocardiogram, the QRS complex is >0.12 sec. and its shape is altered.
SYN: SEE: bundle branch heart block; SEE: interventricular heart block

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