Transtelephonic monitoring of multi-channel ecg waveforms

A - Human Necessities – 61 – B

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A61B 5/04 (2006.01) A61B 5/00 (2006.01) A61B 5/0428 (2006.01)

Patent

CA 2402070

Remote monitoring of biological signals such as ECG waveforms, in which an FM encoded version of an ECG waveform is transmitted from a patient's home to a central station where it is analyzed to estimate local frequencies at many more time points than the zero crossovers of the FM signal. A plurality of ECG waveforms is encoded in a composite FM signal any one point of which can represent at the same time a number of ECG waveforms. The composite waveform is analyzed at the central station (30) to extract and reconstruct the individual waveforms by separation in the frequency domain.

L'invention concerne une surveillance à distance de signaux biologiques tels que des formes d'onde ECG, une version codée FM d'une forme d'onde ECG étant émise à partir du domicile du patient vers une station centrale où elle est analysée en vue d'une estimation des fréquences locales à plus de points temporels que de passages par zéro du signal FM. Une pluralité de formes d'onde ECG est codée dans un signal composite FM à n'importe quel point pouvant représenter en même temps un nombre de formes d'onde ECG. La forme d'onde composite est analysée au niveau de la station centrale en vue d'extraire et de reconstruire les formes d'onde individuelles par séparation dans le domaine fréquence.

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