Methods and systems for performing pacing interval optimization are
provided. One or more optimum pacing interval is determined for each of a
plurality of different ranges of heart rate, different levels of
autonomic tone, different body temperature ranges, or combinations
thereof. The information (e.g., measures of hemodynamic response)
collected to perform pacing interval optimization can be collected and
stored in a table over disjoint periods of time. Such measures of
hemodynamic performance are preferably relative measures, but can
alternatively be absolute measures.