Title:
【発明の名称】植込型刺激システムと心不整脈の停止法
Document Type and Number:
Japanese Patent JPH08503649
Kind Code:
A
Abstract:
A cardiac arrhythmia is terminated by stimulating the heart during the narrow "region of susceptibility" or termination window of the arrhythmia cycle based upon a statistically significant starting value. The present invention will store a plurality of successful critically timed intervals and compute a central value (e.g., average, mean, median, etc.) and a measure of variability (sample range, standard deviation, etc.). The measure of variability is used to determine the termination window size. In one embodiment, the present invention then "scans" symmetrically-centrifugally about the statistically significant starting value. In an alternate embodiment, the present invention employs ranked scanning, that is, scanning according to the frequency of occurrence of previously successful starting values. The number and size of steps could be either programmable, or automatically computed by the pulse generator based upon the termination window size. With each successful termination, the statistically significant starting value is updated, thereby providing an intelligent stimulation device which can adapt itself to the patient's ever-changing needs. Histograms of the data could also be displayed on a screen so that the physician could quickly verify the appropriateness of the computed central value and range.
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Inventors:
Weinberg, Lizapie
Schjorder, The Eason A
Schjorder, The Eason A
Application Number:
JP51036695A
Publication Date:
April 23, 1996
Filing Date:
September 20, 1994
Export Citation:
Assignee:
PACESETTER,INC.
International Classes:
A61N1/365; A61N1/362; A61N1/39; (IPC1-7): A61N1/365; A61N1/39
Attorney, Agent or Firm:
Tomimura Kiyoshi