Title:
IRREGULAR PULSE DETECTOR USING CONVERTING POINT OF DELTA MODULATED ELECTROCARDIOGRAM WAVE
Document Type and Number:
Japanese Patent JP2648543
Kind Code:
B2
Abstract:
PURPOSE: To discriminate irregular pulse conditions of the heart, by measuring a period existing an isoelectric segment within a prescribed period range with continuing non-inclining signals and positive or negative inclining signals.
CONSTITUTION: A digital signal sequence to express electrocardiogram signals is loaded in a 8-bit register, a microprocessor counts the number of 0 in the 8-bit digital word to classify them into a non-inclination part, a positive- inclination part, and a negative-inclination part. The microprocessor uses a finite-state machine to count the number of periods which an isoelectric segment exists in the electrocardiogram signals based on a series of positive-inclination signals, negative-inclination signals, or non-inclination signals. While a specific transition is generated between states, the increment of a line count value is assigned to the transition, the line count value is accumulated in a range of 2 seconds. By comparing the accumulated line count value with two threshold values, whether the electrocardiogram signal is showing the ventricular fibrillation, the ventricular tachycardia, or the supraventricular tachycardia can be discriminated.
Inventors:
JINCHUI FUSAN
Application Number:
JP18512792A
Publication Date:
September 03, 1997
Filing Date:
July 13, 1992
Export Citation:
Assignee:
KAADEIATSUKU PEESUMEEKAAZU INC
International Classes:
A61B5/361; A61B5/363; A61B5/364; A61N1/37; G06F17/00; (IPC1-7): A61B5/0452
Domestic Patent References:
| JP5244089A |
Attorney, Agent or Firm:
Motohiko Fujimura (1 outside)