The use of body surface laplacial mapping for non-invasive detection of cardiac ischemic changes in pigs

摘要

In an experimental study, we induced localized cardiac ischemia and recorded potential maps and bipolar Laplacian maps from the body surface of six female Yorkshire pigs. The electrical changes associated with ischemia were generally localized in a few electrodes in the Laplacian maps (often one or two) but were evident in a large number of electrodes in the potential maps. The localization of activity in the Laplacian maps allows for the discrimination of multiple independent ischemic sites.