Figure 2:

Creating the mapping into LE space and populating it with subsequent beats. A) A set of simultaneously recorded time signals from the original signal space, from which we create a mapping using the LE approach to a low dimensional (in this case three) representation. The axes of this LE space are labeled arbitrarily EV1–3 and the loop of white spheres is the parametric representation of the same data, each sphere signifying an instant in time. This loop of white spheres is referred to as the control trajectory. B) Signals recorded during an episode (in this case ischemia) mapped into the same space. The red trajectory shows a single ischemic beat mapped into the LE space using the same mapping that was calculated from the control beat.