Device for determining tachycardiac heart rhythm disturbances

Surgery – Diagnostic testing – Cardiovascular

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A61B 50468

Patent

active

060352329

ABSTRACT:
A device for determining tachycardial heart rhythm disturbances, comprising: a stimulation pulse generator; a ventricular stimulation electrode; an electrode line; one sensor electrode each in the atrium and ventricle of a heart; an atrial action detecting device; a ventricular action detecting device; a timer; an atrial interval detecting device; a ventricular interval detecting device; a comparator unit which compares the chronological spacings of successive atrial actions and successive ventricular actions and outputs a stimulation inducing signal; an evaluation device for detecting and evaluating changes, caused by the ventricular stimulation pulse in the atrial intervals and for outputting a tachycardia classification signal that characterizes the outcome of the evaluation; and a stimulation control device connected on the output side to the stimulation pulse generator, for controlling the output of a train of stimulation pulses at such intervals as occur between the stimulation pulses of a plurality of spontaneous ventricular actions at a time, with the definition of an interval varying within the train in a predetermined way, of each ventricular stimulation pulse from the preceding or next expected spontaneous ventricular action.

REFERENCES:
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patent: 5379776 (1995-01-01), Murphy et al.
patent: 5383910 (1995-01-01), den Dulk
Jenkins et al, "A Single Atrial Extrastimulus Can Distinguish Sinus Tachycardia from 1:1 Paroxysmal Tachycardia", PACE, vol. 9, Nov.-Dec. 1986, Part II, pp. 1063-1068.

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