Abstract: Methods and systems for delivering a pacing pulse to an atrium during a cardiac cycle. A retrograde P-wave may be identified during the cardiac cycle, indicative of sub-threshold atrial pacing. Delivery of the pacing pulse to the atrium may be adjusted in a subsequent cardiac cycle in response to identifying the retrograde P-wave. Adjusting delivery of the pacing pulse may involve initiating an atrial capture threshold test, temporarily increasing one or both of the pacing pulse amplitude and pulse width, and/or re-evaluating one or both of the pacing pulse amplitude and pulse width. Adjusting delivery of the pacing pulse may also involve altering the timing of a scheduled atrial capture threshold test. During an atrial capture threshold test, a retrograde P-wave template may be generated in response to atrial non-capture sensed during the atrial capture threshold test, and used to identify subsequent retrograde P-waves.

Abstract: A computer process initiates a pre-analysis of managed objects and corresponding structures for storing object data in a relational database. The pre-analysis yields a set of operational instructions (e.g., a “stored” database procedure) that can be applied at run time to more efficiently initiate a modification to objects and corresponding object data stored in a relational database. After execution of a stored procedure to modify contents of an object and respective contents in a relational database, a synchronizer utilizes an identifier to access a log that stores changes associated with a managed object to which the stored procedure was applied. Based on contents of the log, the synchronizer identifies changes to one or more managed objects and identifies corresponding processes that rely on use of the affected managed objects. The synchronizer then notifies corresponding processes utilizing the affected managed objects of the changes to the relational database and/or managed objects.