Patent Document ID: 7937149
Application ID: 10727074
Patent Flag: 1

Claim One:
1. An implantable medical device for detection of changes in physiologic parameters, comprising: means for generating measured physiologic parameters; means for generating an adaptive baseline trend of the measured physiologic parameters corresponding to a first time period; means for generating a short term trend of the measured physiologic parameters corresponding to a second time period less than the first time period; means for generating a metric of physiologic parameter change between the adaptive baseline trend and one of a most recent measured physiologic parameter and the short term trend of the measured physiologic parameters; and means for updating the adaptive baseline trend by setting the adaptive baseline trend equal to a previous adaptive baseline trend reduced by a predetermined downdrift in response to the current adaptive baseline trend being greater than the current short term trend, and by setting the adaptive baseline trend equal to the previous adaptive baseline trend increased by a predetermined updrift in response to the current adaptive baseline trend being less than the current short term trend, the downdrift and the updrift having respective first values in response to a decline in the measured physiologic parameters being associated with decomposition, and respective second values different from the first values in response to an increase in the measured physiologic parameters being associated with decomposition.