Propagation Map Calculation and Data Export
Raw AcQMap electrode biopotential signals were visually inspected to identify outlying or corrupted signals, which were then manually excluded. A low pass filter at 100Hz as well as a 50Hz notch filter and smoothing algorithm were applied followed by selection of a QRS-T wave template for subtraction. Three consecutive 10-second mapping segments were created for simultaneous timepoints in both the left and right atria, confirmed relative to the coronary sinus low amplitude pacing spike. This process was repeated to create two 30-second AF maps following splicing together of each 10s segment. Propagation maps were calculated using the default timing method (based on -dv/dt of dipole signals), window width (for isochronal colour bars) of 80ms and time threshold of 70ms (representing presumed minimum refractoriness). AcQTrack propagation patterns were calculated for each segment and data exported for offline analysis.