1. A system for verifying the occurrence of a cardiac event during a manual evaluation of an operating parameter of an implantable cardiac stimulation device, comprising: a template generator that generates an electrogram template standard characterizing the cardiac event; an event marker pattern generator that generates a marker pattern standard representing a desired sequence of cardiac events including the cardiac event; a sensing circuit that senses cardiac activity to provide an evaluation electrogram signal responsive to evaluation of the operating parameter, the template generator generating an evaluation electrogram from the evaluation electrogram signal, the event marker pattern generator generating an evaluation marker pattern from the evaluation electrogram signal, and a cardiac event verifier that compares the evaluation electrogram to the electrogram template standard and the evaluation marker pattern to the marker pattern standard and verifies the occurrence of the cardiac event when the evaluation electrogram matches the electrogram template standard and the evaluation marker pattern matches the marker pattern standard.