Purkinje myocyte tmeehan Specialized cardiac myocyte that is subendocardially interspersed with the regular cardiac muscle cell. They are uninucleate cylindrical cells, associated end-to-end in long rows, continue from the node to the atrioventricular bundle; relatively short compared to ordinary myocytes but are nearly twice their diameter. myocytus conducens cardiacus cell CL:0002068 Purkinje cell fiber BTO:0001032 Purkinje muscle cell FMA:14146 2010-06-28T08:36:15Z specialized cardiac myocyte