Shaped lead with electrodes

Details Shaped lead with electrodes Shaped lead with electrodes

A - Human Necessities

61

N

A61N 1/05 (2006.01)

Patent

CA 2469080

In general, an apparatus including a lead body and at least two electrodes. The lead body is so shaped that the lead body brings the first electrode against cardiac tissue yet keeps the second electrode away from contact with the cardiac tissue. These electrodes may be separated by a very small distance. When the lead is implanted in the superior vena cava, each electrode generates a distinct voltage signal as a function of sensed electrical activity. Although each electrode may sense a far-field R-wave in addition to a P-wave, the difference between the signals from the electrodes preserves the P-wave but includes a reduced far-field R-wave.

En règle générale, l'invention concerne un appareil comportant un corps conducteur et au moins deux électrodes. Le corps conducteur est conformé de manière à mettre en contact la première électrode avec le tissu cardiaque, tandis que la seconde électrode est maintenue hors contact. Ces électrodes peuvent être séparées par une distance très faible. A l'implantation du conducteur dans la veine cave supérieure, chaque électrode fournit un signal de tension distinct en fonction de l'activité électrique détectée. Bien que chaque électrode puisse détecter une onde R de champ lointain en plus d'une onde P, la différence entre les signaux fournis par les électrodes préserve l'onde P mais fait intervenir une onde R de champ lointain réduite.

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