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US 2003/0144700 A1Published application
Dual chamber method and apparatus for diagnosis and treatment of arrhythmias
AssigneeMedtronic, Inc.
InventorsMark L. Brown, Jeffrey M. Gillberg, Robert W. Stadler
Life of this patent
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Abstract
A method and apparatus are provided for improving the detection of certain cardiac rhythms by combining dual chamber interval-related detection methods with electrogram morphology analysis. A prioritized set of rules are defined wherein each rule is directed at identifying a particular arrhythmia or type of arrhythmia. Each rule includes clauses that may be related to sensed event intervals and interval patterns and at least one rule includes at least one clause relating to the EGM morphology.
Claims26
An implantable medical device, comprising:
- means for sensing cardiac events;
- means for applying interval only logic steps to determine cardiac rhythms in response to the sensed cardiac events;
- means for combining morphology based considerations of the cardiac rhythms with the interval only logic steps to achieve improved specificity in arrhythmia detection of the apparatus without loss of sensitivity;
- and
- means for delivering therapy in response to the means for combining.
2 more elements
An implantable medical device, comprising:
- means for sensing cardiac events;
- means for applying interval only logic steps to determine cardiac rhythms in response to the sensed cardiac events;
- means for combining interval only logic steps for determining whether the cardiac rhythms correspond to a double tachycardia and morphology of the cardiac rhythms to determine whether the cardiac rhythms correspond to a double tachycardia, combining interval only logic steps for sinus tachycardia or other 1:1 SVT and morphology of the cardiac rhythms to determine whether VF/FVT/VT with 1:1 VA is satisfied, and determining whether the cardiac rhythms have a morphology that corresponds to sinus rhythm and whether an RR interval is greater than or equal to a PP interval;
- and
- means for delivering therapy in response to the means for combining.
2 more elements
Dependencies are inferred from the claim text.