Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2005-12-20
2005-12-20
Manuel, George (Department: 3762)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
Reexamination Certificate
active
06978175
ABSTRACT:
An implantable stimulation device delivers a stimulation pulse in the ventricular chamber of a patient's heart and automatically adjusts a post-ventricular atrial blanking period. The stimulation device generates a ventricular stimulation pulse to trigger an evoked response, in order to produce a ventricular far-field signal that follows a successfully captured ventricular stimulation pulse. The stimulation device further includes an atrial sense circuit that senses the ventricular far-field signal, and a control system that adaptively segments the post-ventricular atrial blanking period in a post-ventricular atrial blanking period (PVAB) which is fixed in duration, and a variable far-field interval (FFI) window. PVAB is initiated upon the delivery of the ventricular stimulation pulse, such that events sensed outside the segmented post-ventricular atrial blanking (SPVAB) period are presumed to be intrinsic atrial events, and events sensed within the far-field interval window are presumed to be far-field signals. The far-field interval window is preferably centered on a previously sensed far-field R-wave. If an intrinsic ventricular event is sensed, the stimulation device does not initiate the PVAB period but rather sets the FFI window.
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Levine, Paul A., M.D., FACC, “The Importance of the Post-Ventricular Atrial Blanking Period(PVAB)with Respect to Far Field R Wave Detection,” St. Jude Medical CRMD, pp 1-16 (Nov. 21, 1999).
Florio Joseph J.
Sloman Laurence S.
Faulcon, Jr. Lenwood
Manuel George
Pacesetter Inc.
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