Revealing hidden information from unipolar extracellular potentials

摘要

Upper: Schematic overview of the epicardial mapping scheme including the electrode array. The surgeon places the mapping array (shown at right) upon the epicardium of the right atrium (RA), left atrium (LA), posterior LA (PLA), and Bachmann bundle (BB) to record 5 seconds of sinus rhythm and/or 10 seconds of atrial fibrillation. Lower: Comparison of conventional and novel signal processing methodologies of unipolar extracellular potentials. Local activation, annotated by red markers, is defined as any steep deflection in the novel methodology (bottom image) instead of only the steepest deflection within a range of 50ms (conventional methodology, top image). ICV = inferior caval vein; SCV = superior caval vein.