Apparatus for tissue stimulation
AssigneePacesetter, Inc.
InventorsKjell Norén, Jakub Hirschberg, Hans Strandberg
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Abstract
Mathematical functions such as recursive autoregression models which include parameters are used for defining the heart signal and any signals disturbing the heart signal, such as polarization signals. By registering, during a predetermined time interval, the electrode signal for determining the parameters for one or more different mathematical functions, the parameters can be used on their own or in combination to determine the activity of the heart, i.e., whether the registered electrode signal corresponds to a stimulated, spontaneous or absence of heart activity.
Claims13
An apparatus for tissue stimulation comprising a pulse generator which generates stimulation pulses, an electrode connected to said pulse generator and adapted for delivering said stimulation pulses in vivo to tissue, a detector which acquires an electrical signal corresponding to an electrical potential at said tissue during a predetermined time interval following a delivered stimulation pulse,
- a determination unit which determines a value of at least one parameter of a predetermined mathematical function, which produces a best adaptation of said predetermined mathematical function to said electrical signal during said predetermined time interval, and an evaluation unit which compares the at least one parameter with a predetermined corresponding parameter range and which generates a signal indicative of a result of said comparison.
Dependencies are inferred from the claim text.