Atrio-His bundle tracts are very rare, identified in only 2 of 687 histologically studied hearts, and may cause rapid ventricular response to supraventricular arrhythmias.
Observational (n=687)
The atrio-His bundle tracts are very rare; only two have been found in 687 hearts studied histologically. These tracts have a similar appearance to those of the atrioventricular bundle and form a complete bypass of the atrioventricular node. In their presence the electrocardiogram may show a short or normal PR interval. They may be responsible for some cases of very rapid ventricular response to supraventricular arrhythmias.
C Brechenmacher (Fri,) conducted a observational in Atrio-His bundle tracts (n=687). Atrio-His bundle tracts are very rare, identified in only 2 of 687 histologically studied hearts, and may cause rapid ventricular response to supraventricular arrhythmias.