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Fig. 5 | BMC Medical Informatics and Decision Making

Fig. 5

From: Evaluation and optimization of novel extraction algorithms for the automatic detection of atrial activations recorded within the pulmonary veins during atrial fibrillation

Fig. 5

Correction of missed AAs for the Rel-En algorithm. Three activations are detected on this time window (dotted vertical lines). The top panel shows the IEGM. Second panel: combined weight functions \(W_{l|n}\). (linear in red, non-linear in blue) Third panel: effect on the output signal (in black) of the linear (red) and non-linear (blue) weights for each interval. The first interval is long (432 ms) compared to the mean value (231 ms) of the AA intervals. The central part of the interval is then amplified and the weighted amplitude is above the detection threshold (horizontal dashed lines), revealing a missed activation. The second interval is short (185 ms), the signal is not amplified and no missed activation is detected. The last panel displays the missed activation in detail. AA, atrial activation; Rel-En, relative energy algorithm

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BMC Medical Informatics and Decision Making

ISSN: 1472-6947

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