Patent ID: 8798731
Filing Date: 2014-08-05
Classification: A61B,A61N

Abstract:
1. An implantable system, comprising: one or more leads that collectively including a plurality of electrodes ; wherein at least two of the electrodes are implantable in a left ventricular (LV) chamber; one or more sensing circuits configured to sense cardiac electrical activity; and a sensing vector controller that selectively connects subsets of the electrodes to a said sensing circuit to thereby provide a plurality of sensing vectors that enable a plurality of different intracardiac electrograms (IEGMs) to be obtained that collectively enable electrical activations to be detected in a left atrial (LA) chamber, a right atrial (RA) chamber, and at least one ventricular chamber; an electrical activation pattern monitor configured to determine an LA activation time, an RA activation time, and a ventricular activation time, for each of a plurality of cardiac cycles, based on the plurality of obtained IEGMs; and an arrhythmia discriminator configured to perform arrhythmia discrimination based on the determined activation times, wherein: the electrical activation pattern monitor is configured to the arrhythmia discriminator is configured to determine that the inter-atrial delays are indicative of atrial fibrillation (AF) if the inter-atrial delays do not meet the uniformity criterion.