1. A method for processing physiologic data, comprising: (A) dynamically selecting a first subset of physiologic channels from a plurality of physiologic channels based on a selection criterion at a first time value; (B) retaining a first data associated with the first subset of physiologic channels; (C) dynamically selecting a second subset of physiologic channels from the plurality of physiologic channels based on the selection criterion at a second time value; and (D) retaining a second data associated with the second subset of physiologic channels.