Heart rate change sensor

Details Heart rate change sensor Heart rate change sensor

1976-05-18

1978-01-03

Kamm, William E.

Surgery

Truss

Perineal

A61B 504

Patent

active

040660699

ABSTRACT:
A reference heart beat is recirculated for comparison with an actual heart beat. First and second voltages are respectively produced with magnitudes representing the rates of recirculation of the reference heart beat and the actual heart beat. A voltage controlled oscillator produces a signal having a variable frequency dependent upon the differences in the first and second voltages. This signal is used to synchronize the rate of the reference heart beat with the rate of the actual heart beat.
The actual heart beat may be separated into progressive segments. The characteristics of the actual heart beat in the progressive segments are compared with the characteristics of the reference heart beat in corresponding segments. An output indication is provided when the characteristics of the actual and reference heart beats in the progressive segments do not coincide. An output indication is also produced when the amplitude of the signals representing the differences between the rates of the actual and reference heart beats experiences abrupt changes.

REFERENCES:
patent: 3524442 (1970-08-01), Horth
patent: 3654916 (1972-04-01), Neilson
patent: 3759248 (1973-09-01), Valiquette
patent: 3779237 (1973-12-01), Goeltz et al.
patent: 3789159 (1974-01-01), Feit et al.
patent: 3824990 (1974-07-01), Baule

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