Patent ID: 8996102
Filing Date: 2015-03-31
Classification: A61B,A61N

Abstract:
1. In an implantable system, a method for assessing a patients' myocardial electrical stability, comprising: (a) obtaining an electrogram (EGM) signal using implanted electrodes; (b) identifying, based on the EGM, periods when the patient experiences T-wave alternans; (c) determining, based on the EGM, whether premature ventricular contractions (PVCs) cause phase reversals of the T-wave alternans; (d) assessing the patient's myocardial electrical stability based on an extent to which PVCs cause phase reversals of the T-wave alternans; and (e) triggering a response based on the results of step (d), wherein the response involves delivering anti-arrhythmia therapy, wherein the response, if a PVC causes a phase reversal of the T-wave alternans, further includes charging a capacitor, in case the patient goes into ventricular fibrillation and needs therapy.