Patent · US Expired

Heart stimulator having an evoked response detector

US6501989B1 · kind B1 · utility

4Cited by

8References

20Claims

0Family size

Assignee

ST. JUDE MEDICAL AB · SE

Inventors

Asa Uhrenius · Stockholm, SE
Berit Larsson · Danderyd, SE
Peter Andersson · Ängelholm, SE
Goran Budgifvars · Spånga, SE
Feresteh Shojael · Solna, SE

Key dates

Filing date	Mar 21, 2001
Grant date	Dec 31, 2002
Priority date	—
Expiry date	Mar 21, 2021

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B5/377
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A heart stimulator has an evoked response detector which determines evoked response in the presence of polarization. To determine the magnitude of the polarization for different stimulation amplitudes, the electrode signals picked up by a lead after the delivery of a stimulation pulse having a selected amplitude are measured. A polarization signal is obtained from the picked up signals, and this polarization signal, with modification, is subtracted from signals picked up following subsequently emitted stimulation pulses. Dependent on the subtraction result, a determination is made as to whether an evoked response has occurred.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.