Surgery – Truss – Pad
Patent
1990-03-09
1992-03-24
Kamm, William E.
Surgery
Truss
Pad
A61N 1365
Patent
active
050978322
ABSTRACT:
An implantable pacemaker having means for detecting and responding to a premature ventricular contraction (PVC), also includes circuit means for minimizing the likelihood of sensing a PVC when in fact a PVC has not occurred. The circuit means latches the occurrence of any atrial events sensed during the relative atrial refractory period of the pacemaker, whether such atrial events are noise or an early P-wave; and, in response to such latching, disables the PVC detection circuit until certain prescribed events occur, whereupon the PVC detection circuit is re-enabled. The prescribed events that re-enable the PVC detection circuit after it has been disabled include, e.g., the occurrence of a ventricular pulse or sensed R-wave. Further, in the event a PVC is detected and a desired PVC response is invoked, an additional circuit means automatically terminates the PVC response in the event the PVC response becomes stuck.
REFERENCES:
patent: 4173230 (1979-11-01), Digby
patent: 4552154 (1985-11-01), Hartlaub
patent: 4554920 (1985-11-01), Baker, Jr. et al.
patent: 4554922 (1985-11-01), Prystowsky et al.
patent: 4712555 (1987-12-01), Thornander et al.
patent: 4788980 (1988-12-01), Mann et al.
patent: 4790317 (1988-12-01), Davies
Gold Bryant R.
Kamm William E.
Romano Malcolm J.
Schaetzle Kennedy J.
Siemens-Pacesetter, Inc.
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