Dual chamber heart stimulator with evoked response detector

Details Dual chamber heart stimulator with evoked response detector Dual chamber heart stimulator with evoked response detector

2006-03-28

2006-03-28

Manuel, George (Department: 3762)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S009000

Reexamination Certificate

active

07020522

ABSTRACT:
A heart stimulator has an atrial and ventricular pulse generator for producing atrial and ventricular stimulation pulses, an atrial sensor for sensing atrial signals and an evoked response detector for detecting the occurrence of incipient fusion beats from measured ventricular signals. A determination unit determines an incipient fusion AV-interval from the sensed atrial signals and the detected fusion beats, and a controller controls the pulse generator to deliver stimulation pulses at a controlled AV-interval which is shorter than the incipient fusion AV-interval. The evoked response detector includes an averaging unit which forms an average amplitude value of the measured ventricular signals during a predetermined time window of each cardiac cycle, and a comparator which compares the average value for each cardiac cycle with a predetermined limit criterion, and supplies the result of the comparison to the determination unit for determining a measured ventricular signal resulted from an incipient fusion beat or a completely stimulated capture.

REFERENCES:
patent: 4702253 (1987-10-01), Nappholz et al.
patent: 5391192 (1995-02-01), Lu et al.
patent: 5507782 (1996-04-01), Kieval et al.
patent: 5534016 (1996-07-01), Boute
patent: 5626620 (1997-05-01), Kieval et al.
patent: 5713930 (1998-02-01), van der Veen et al.

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