Supraventricular tachycardia detection apparatus and methods

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

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A61N 1365

Type

Patent

Status

active

Patent number

055407269

Description

ABSTRACT:
A process and device to control a cardiac pacemaker enslaved to at least one physiological parameter. The pacemaker also possesses a mode of desynchronization of the ventricular stimulation when the atrial rhythm is too rapid for synchronous operation. One compares a detected coupling interval (PP) with an escape interval calculated by the enslavement (EI.sub.ASSERV). The calculated enslavement escape interval is preferably decreased by a prematurity factor (x), for example, 0 to 50%, preferably approximately 37.5%, of the calculated escape interval. After the comparison, one counts the number of cardiac cycles for which the coupling interval detected is less than the calculated escape interval, and one triggers the mode of desynchronization (FALLBACK) when the count exceeds a given threshold (y), for example 50 to 75%, preferably approximately 75% of the total number (N) of cardiac cycles analyzed.

REFERENCES:
patent: 4932406 (1990-06-01), Berkovitz
patent: 5271394 (1993-12-01), Girodo et al.

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