Conduits are provided to direct blood flow from the left ventricle to a coronary artery at a location distal to a blockage in the coronary artery. The method comprises triggering a new OTDR measurement, wherein a previous reference measurement has been made indicating an original state of the PON. In this regard, the system may be configured to exert a radial force on a shaft of the electric motor actuator to lock the actuator. This can result in not knowing which logic state is ultimately written. More specifically, it relates to risk modeling using the inputs of credit bureau data, size of wallet data, and, optionally, internal data.