The Long Term ST Database is a work in progress, begun in 1995 and expected to be completed in early 2001. Five complete recordings are available here. The measurements in the .16a files were used to construct an ST deviation function for each signal. Since differing criteria may be appropriate depending on the application, three sets of ST episode annotations are provided.
Participants meet several times annually to obtain the consensus reference annotations.
These marks serve as guideposts for the automated ST level measurement algorithm that performs the next step. These are used to construct a piecewise linear baseline ST level function, which may vary over time as a result of body position changes or other factors unrelated to ischemia, especially in subjects with prior myocardial infarctions. Local references are placed before and after each such episode, and the episodes are annotated next. For further details, see reference 4 below. Software for producing printed documentation of the Long-Term ST Database is available for Linux or Unix.