A method 100, an apparatus, and a computer program product for constructing a runtime symbol table SymTbl for a computer program are disclosed. A central lumen of the sheath is configured to permit introduction of the lead and includes a flexible, kink-resistant section smooth on its outer surface with a helical pleat defining a helical groove enabling a conductor extending from the mapping probe to the pacing system analyzer to be received in the helical groove of the sheath. A sensor cap is provided for closing an inboard end of the outer member and has an insert nut embedded therein.