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Figure 5 Butterfly plot (upper panels) and root mean square (rms) plot (lower panels) of the electrocardiographic mapping data recorded in patient 1. "W" (activation sequences during normal atrioventricular [AV] conduction) morphology is shown in the left column and "A" (activation sequences during adenosine-induced AV block) morphology in the right column. Vertical calipers mark the automatically detected beginning and end of the QRS complex.
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