Waveform morphology discriminator and method

Details Waveform morphology discriminator and method Waveform morphology discriminator and method

1984-03-12

1985-11-12

Kamm, William E.

Surgery

Truss

Pad

128419PG, A61B 504

Patent

active

045521549

ABSTRACT:
A waveform detection system for use in a pacemaker for distinguishing normal beats from ectopic or abnormal beats for example, such as those involving ventricular tachycardia, ventricular flutter or fribrillation, premature ventricular beats, supraventricular tachycardia, retrograde conduction; and in dual chamber or atrial applications those involving atrial tachycardia and atrial flutter or fibrillation. The term "abnormal" is employed herein to mean all abnormal beats including those specified above. In the system of the illustrated embodiment a sense amplifier is employed for initiating a counter in response to a detected cardiac event and a voltage controlled oscillator is used for converting the instantaneous value of the applied waveform to a bit rate delivered to the counter. The morphology or shape of the physiological waveform is represented by a number present in the counter at the end of the counting cycle which allows for a therapy decision to be made.

REFERENCES:
patent: 3144019 (1964-08-01), Haber
patent: 3524442 (1970-08-01), Horth
patent: 3658055 (1972-04-01), Abe et al.
patent: 3829766 (1974-08-01), Herz
patent: 4388927 (1983-06-01), Schober

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