A pacemaker programmer and diagnostic system retrieves information stored within a pacemaker and analyzes the retrieved data in real time. The stored information can be retrieved by means of a telemetry communication link. The pacemaker automatically lengthens a post-ventricular atrial refractory period...http://www.google.com/patents/US6243606?utm_source=gb-gplus-sharePatent US6243606 - Implantable stimulation device and method for determining atrial autocapture using programmable PVARP
