Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2005-07-26
2005-07-26
Evanisko, George R. (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
C600S515000, C607S019000
Reexamination Certificate
active
06922585
ABSTRACT:
An implantable medical device and method are provided for assessing autonomic tone and risk factors associated with arrhythmias and, based on this assessment, an early recurrence of ventricular tachycardia or ventricular fibrillation is predicted. Specifically, changes in R—R interval, heart rate variability, patient activity, and myocardial ischemia are measured prior to and after a detected an arrhythmia episode. A recurrence score is calculated as a weighted sum of measured parameters and compared to a prediction criterion. The prediction criterion may be a preset threshold score or an individualized episode template based on previously calculated recurrence scores associated with recurring episodes. Stored parameters and episode-related data may be downloaded for offline analyses for optimizing prediction criteria and monitoring patient status.
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Olson Walter H.
Sharma Vinod
Zhou Xiaohong
Evanisko George R.
Medtronic Inc.
Soldner Michael C.
Wolde-Michael Girma
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