Source: http://www.google.com/patents/US8229561?dq=7,403,220
Timestamp: 2014-11-27 13:35:02
Document Index: 742354163

Matched Legal Cases: ['Application No. 11075175', 'Application No. 11075176', 'Application No. 06770395', 'Application No. 10006401', 'Application No. 2005', 'Application No. 05853683', 'Application No. 2007']

Patent US8229561 - Atrial retrograde management - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsMethods and systems for classifying cardiac responses to pacing stimulation and/or preventing retrograde cardiac conduction are described. Following delivery of a pacing pulse to an atrium of the patient's heart during a cardiac cycle, the system senses in the atrium for a retrograde P-wave. The system...http://www.google.com/patents/US8229561?utm_source=gb-gplus-sharePatent US8229561 - Atrial retrograde managementAdvanced Patent SearchPublication numberUS8229561 B2Publication typeGrantApplication numberUS 11/012,692Publication dateJul 24, 2012Filing dateDec 15, 2004Priority dateDec 15, 2004Also published asUS20060129199Publication number012692, 11012692, US 8229561 B2, US 8229561B2, US-B2-8229561, US8229561 B2, US8229561B2InventorsGeng Zhang, Ankur GargOriginal AssigneeCardiac Pacemakers, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (100), Non-Patent Citations (19), Classifications (10), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetAtrial retrograde managementUS 8229561 B2Abstract Methods and systems for classifying cardiac responses to pacing stimulation and/or preventing retrograde cardiac conduction are described. Following delivery of a pacing pulse to an atrium of the patient's heart during a cardiac cycle, the system senses in the atrium for a retrograde P-wave. The system classifies the atrial response to the pacing pulse based on detection of the retrograde P-wave. The system may also sense for an atrial evoked response and utilize the atrial evoked response in classifying the cardiac pacing response. If capture is not detected, the system may deliver additional atrial pacing pulses to reduce atrial retrograde conduction. A backup pace may be delivered to prevent the atrial retrograde conduction if an atrial evoked response is not detected during a cardiac cycle. Alternatively, retrograde management may involve delaying a next scheduled pace may be until expiration of an atrial effective refractory period.
RELATED PATENT DOCUMENT This patent application is related to commonly owned U.S. patent application Ser. No. 11/012,433, entitled �Atrial Capture Detection,� filed concurrently herewith and incorporated herein by reference.
FIELD OF THE INVENTION The present invention relates generally to implantable medical devices and, more particularly, to reducing atrial retrograde conduction.
SUMMARY OF THE INVENTION The present invention is directed to methods and systems for classifying cardiac responses to atrial pacing and managing atrial retrograde conduction. One embodiment of the invention is directed to an atrial retrograde management method. The method involves delivering a pacing pulse to an atrium during a cardiac cycle and determining if the atrial pacing pulse captured the atrium. The method further involves sensing for an intrinsic activation of the ventricle during the cardiac cycle and delivering a pacing pulse to the ventricle if the intrinsic ventricular activation is not detected. Atrial retrograde management is provided if the atrial pacing pulse did not capture the atrium. The atrial retrograde management involves the delivery of another pacing pulse.
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