Arrangement for determining a heart rate by automatically...

Details Arrangement for determining a heart rate by automatically... Arrangement for determining a heart rate by automatically...

2005-01-04

2005-01-04

Schaetzle, Kennedy (Department: 3762)

Surgery

Diagnostic testing

Cardiovascular

C607S014000, C607S005000, C607S009000

Reissue Patent

active

RE038680

ABSTRACT:
An arrangement for determining the heart rate (fRR) or the refractory time of the cardiac tissue, particularly for detecting tachycardia or fibrillation, has an electrode (E) for sensing heart action signals (SIG), an input stage, connected to the electrode, for processing the heart action signals, a refractory member for ascertaining a refractory time value of the arrangement, in each case after a predetermined segment of a heart action signal, and a processing device, connected to the output of the input stage or of the refractory member, for determining the rate of the heart action signals, processed with blanking of the component that occurs during the refractory time, or for determining the refractory time value of the cardiac tissue. The arrangement further includes a device which is connected at least indirectly to the output of the processing device or of the input stage for automatically adjusting the refractory time of the refractory member as a function of a previously determined value of the heart rate or of a signal parameter of a previously determined heart action signal.

REFERENCES:
patent: 4393877 (1983-07-01), Imran et al.
patent: 4577633 (1986-03-01), Berkovits et al.
patent: 4895151 (1990-01-01), Grevis et al.
patent: 4967746 (1990-11-01), Vandegriff
patent: 5129393 (1992-07-01), Brumwell
patent: 2853642 (1980-06-01), None
Medical & Biological Engineering & Computing, Jan. 1978, 16, pp. 121-123.

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