Patent ID: 6760614
Filing Date: 2004-07-06
Classification: A61B

Abstract:
A method of enhancing detection of p-waves in an ECG input signal train picked up by surface electrodes affixed to a patient in whom a dual channel CRMD has been implanted, comprising the steps of:(a) applying the ECG input signal to first and second signal processing channels, said first channel including a low pass filter having a cut-off frequency capable of attenuating spectral energies characteristic of ventricular depolarization while passing spectral energies characteristic of atrial depolarization, said second channel comprising a signal delay configured to match a signal delay inherent in the low pass filter; (b) normally outputting the ECG input signal from the second channel; and (c) causing the ECG input signal train exiting the first channel to be presented for a predetermined time following a detection of an atrial pace pulse produced by the CRMD.