A device for correlating trend data with respect to a patients weight ankle displacement can identify conditions indicative of congestive heart failure. A weight scale or similar device coupled with imaging mechanism operable to measure ankle displacement collects a plurality of measurements over a period of time. Over time trend analysis of both the patients weight and the ankle displacement measurements can be obtained and compared to identify whether over a particular sample period an increase in a patients ankle displacement is or is not correlated with an increase in the patients weight. When an increase in ankle displacement is identified as not correlating to a corresponding change in the patients weight an alert can be issued of conditions indicative of congestive heart failure.
