Cardiac impedance signal analysis device

Abstract

The invention relates to a cardiac impedance signal analysis device. The cardiac impedance signal analysis device comprises a cardiac impedance signal data read-in system, a respiratory interference removing system, a cardiac output calculation system, a shock coupling factor calculation system and a cardiac load index calculation system. The cardiac impedance signal data read-in system is used for acquiring the cardiac impedance signals of a subject in the whole evening. The breathe interference removing system is used for removing respiratory interference of the cardiac impedance signals. The cardiac output calculation system is used for calculating the cardiac impedance signals obtained after breathe interference is removed, obtaining the cardiac output time sequence of the subject in the whole evening, and sending the obtained cardiac output time sequence of the subject in the whole to the shock coupling factor calculation system and the cardiac load index calculation system. The shock coupling factor calculation system is used for analyzing the cardiac output time sequence of the subject in the whole evening to obtain a shock coupling factor for evaluating the cardiac compensatory function of the subject, and sending the shock coupling factor to the cardiac load index calculation system. The cardiac load index calculation system carries out coupling calculation according to the cardiac output time sequence of the subject in the whole evening and the shock coupling factor, and a cardiac load index capable of reflecting the cardiac load degree in the sleep process of the subject is obtained.

Description

technical field [0001] The invention relates to the technical field of medical signal processing and analysis, in particular to a cardiac impedance signal analysis device. Background technique [0002] According to statistical results, at least 40% of patients with cardiovascular diseases suffer from obstructive sleep apnea syndrome (Obstructive Sleep Apnea Hypopnea Syndrome, OSAHS); about 50% of patients with OSAHS suffer from cardiovascular diseases at the same time. OSAHS is one of the causes of cardiovascular disease independent of factors such as age, obesity and smoking (Hale, JInsurMed2005), and cardiovascular and cerebrovascular diseases are the main cause of death in OSAHS patients (Lavie, SleepMedRev2003). [0003] Recent studies have shown that the changes of increased sympathetic activity and decreased parasympathetic activity in OSAHS patients are mainly related to nocturnal intermittent hypoxia (Palma et al, Sleep 2013). Investigations show that acute myocardi...

AI Technical Summary

Problems solved by technology

However, at present, many related studies are done by using Doppler ultrasound to simulate breathing force of normal people, and the continuous changes of nocturnal hemodynamics and the impact of respiratory events in OSAHS patients cannot be evaluated, and there is no suitable objective index To comprehensively reflect cardiac load, improvement or deterioration of cardiac function, and risk of cardiovascular events

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