Accession Number : AD0719800

Title :   Research in Models of Respiratory Control of Heart Rate.

Descriptive Note : Final rept. 3 Jan 68-16 May 70,

Corporate Author : TEXAS UNIV AUSTIN ELECTRONICS RESEARCH CENTER

Personal Author(s) : Womack,Baxter F. ; Chick,Donald R. ; Galloway,D. Graham ; Hinderer,James H.

Report Date : DEC 1970

Pagination or Media Count : 172

Abstract : Several mathematical techniques were applied in a study of respiratory sinus arrhythmia, the phenomenon by which respiration modulates heart rate in normal human beings and in many animals. Based on the information gained, computational algorithms were written to suppress the respiratory influence on heart rate and thus facilitate future study of other influences on beat-to-beat heart rate. Three different modeling approaches were applied. The first assumed a linear model corrupted by noise, and used the fast Fourier transform (FFT) to convert long segments of controlled rate breathing data into a frequency domain model. The second modeling approach assumed a general nonlinear sampled data model with the output corrupted by additive noise as well as by many nonrespiratory influences. The third modeling approach used elimination regression as an identification technique. A three-path nonlinear model was developed which simulates heart rate response to sinusoidal and step-breathing maneuvers. (Author)

Descriptors :   (*PULSE RATE, CONTROL), (*RESPIRATION, MATHEMATICAL MODELS), (*ARRHYTHMIA, CONTROL), PARANASAL SINUSES, ELECTROCARDIOGRAPHY, HEART, RESPONSE(BIOLOGY), CORRELATION TECHNIQUES

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE