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AssigneePacesetter, Inc.
InventorsGene A. Bornzin, Paul A. Levine, Kenneth Valikai, Jason A. Sholder
Estimating the term…
An implantable dual chamber stimulation device provides a novel detection scheme for automatically detecting atrial capture and performing an atrial pacing threshold assessment. The stimulation device preferably waits until the patient is at or near rest and monitors the patient's P-wave activity to determine an detection window where a next P-wave is expected to occur. The stimulation device then delivers an atrial pulse prior to the next detection window, and monitors the window to determine whether a P-wave occurs therein. If a P-wave does not occur, then atrial capture is present, while occurrence of a P-wave indicates absence of atrial capture. If atrial capture is absent, the stimulation device automatically determines an appropriate atrial pacing threshold by monitoring the detection window while adjusting the stimulation pulse energy level. Advantageously, the present invention further employs a “bottom-up” adjusting scheme which starts at a low energy level, below the expected atrial pacing threshold, and increases the energy level until atrial capture is detected, thus saving energy and further avoiding corruption by large polarization signals. The latter feature is compatible with the present detection scheme and conventional evoked response detection schemes. The new atrial pacing threshold is then set at the atrial pulse level at which atrial capture was effectuated plus a predetermined safety margin.
In an implantable stimulation device, wherein the implantable stimulation device is a dual-chamber device operable in an atrial tracking mode and an atrial non-tracking mode, a system for detecting atrial capture and automatically setting an atrial stimulation pulse energy, the system comprising:
In an implantable stimulation device, a system for detecting atrial capture and automatically setting an atrial stimulation pulse energy, the system comprising:
In an implantable dual-chamber stimulation device, a method for detecting atrial capture and for automatically setting an atrial stimulation level, the method comprising the steps of:
In an implantable stimulation device, a method for detecting atrial capture and for automatically setting an atrial stimulation level, the method comprising the steps of:
Dependencies are inferred from the claim text.