bundle of His

noun
\-ˈhis \

Medical Definition of bundle of His 

: a slender bundle of modified cardiac muscle that passes from the atrioventricular node in the right atrium to the right and left ventricles by way of the septum and that maintains the normal sequence of the heartbeat by conducting the wave of excitation from the right atrium to the ventricles

called also atrioventricular bundle, His bundle

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