P Wave detection system

Details P Wave detection system P Wave detection system

1982-07-12

1985-04-16

Cohen, Lee S.

Surgery

Truss

Pad

A61B 504

Patent

active

045109451

ABSTRACT:
A system for detecting P waves samples a cardiac signal during first and second time periods set by a clock signal. Comparators determine whether the signal increases in voltage during the time periods by a predetermined value, testing whether the slew rate of the signal falls within a range corresponding to the slew rate of a P wave. Latches responsive to the comparators provide input to a logic circuit whose output clocks a counter. Three successive positive samples input into the counter will cause the counter to generate a signal indicating a P wave has been detected.

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Parsonnet, Myers and Kresh, "Characteristics of Intracardiac Electrograms II: Atrial Endocardial Electrograms", PACE, Jul.-Aug. 1980, vol. 3, pp. 406-417.

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