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Adaptive filter results during arrhythmia induction. Identification of premature ventricular contractions (PVC) (a) and transient complete atrioventricular (AV) block (b) was enhanced in the corrected ECG waveforms. In (b), Q=normal QRS, V=ventricular escape beat, T=T wave, and |-|= interval of complete atrioventricular block. See text for details.
