Surgery – Truss – Pad
Patent
1982-08-26
1987-03-24
Kamm, William E.
Surgery
Truss
Pad
A61N 130
Patent
active
RE0323780
ABSTRACT:
An atrial-ventricular demand pacemaker having improved atrial pulse artifact rejection includes a blanking circuit (30, 100) connected in the signal path from the ventricular output terminal (17) to the sensing amplifier (21) to blank the signal during an atrial pulse. A holding circuit including a low-pass filter (46, 137) and a switching element (43, 112) stores a prior signal value at the sensing amplifier input during the blanking interval, and delays return to normal operation until after the blanking circuit has returned to normal. Artifact rejection is also improved by limiting atrial pulse output circuit recharge time and by limiting polarization current driven into the ventricular output circuitry by an atrial output pulse.
REFERENCES:
patent: 3498288 (1970-03-01), Max et al.
patent: 3656487 (1972-04-01), Gobeli
patent: 3661158 (1972-05-01), Berkovits
patent: 3911929 (1979-10-01), Gobell
patent: 3920024 (1975-11-01), Bowers
patent: 4114627 (1978-09-01), Lewyn et al.
patent: 4312355 (1982-01-01), Funke
Harthorne et al., "Boston Colloquium on Cardiac Pacing", Martinus Nijhoff Medical Division, The Hague, 1977, pp. 116-120.
Breimayer Joseph F.
Duthler Reed A.
Kamm William E.
Medtronic Inc.
Rooney John L.
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