The process that mediates interactions between a Purkinje myocyte and its surroundings that contributes to the process of the Purkinje myocyte communicating with a ventricular cardiac muscle cell in cardiac conduction. Encompasses interactions such as signaling or attachment between one cell and another cell, between a cell and an extracellular matrix, or between a cell and any other aspect of its environment. [ GOC:BHF GOC:mtg_cardiac_conduct_nov11 ]