Isolation of ventricular extrasystrolic signals from the preceding heart activity by adaptive filtering

Noninvasive 3-dimensional localization of the origin of ventricular extrasystoles (VES) is possible from multichannel MEG data after separation of VES onset from the preceding repolarization activity. An adaptive filter algorithm for signal separation is suggested. Compared to conventional digital subtraction, the adaptive filter saves interactive computer time, and first experiences with multichannel MCG data indicate that the result is more accurate.