Patent Document ID: 9510763
Application ID: 13462404
Patent Flag: 1

Claim One:
1. A method comprising: receiving, with a processing unit, a torso-surface potential signal from each electrode of a plurality of electrodes distributed on a torso of a patient, wherein receiving the torso-surface potential signal from each electrode comprises: receiving first torso-surface potential signals sensed during intrinsic conduction of the heart of the patient; and receiving second torso-surface potential signals sensed during cardiac resynchronization therapy (CRT) pacing of the heart of the patient; for each electrode of at least a subset of electrodes of the plurality of electrodes, calculating, with the processing unit, a torso-surface activation time based on the torso-surface potential signal sensed from the electrode, wherein calculating the torso-surface activation times comprises: calculating first torso-surface activation times based on the first torso-surface potential signals; and calculating second torso-surface activation times based on the second torso-surface potential signals, and determining, with the processing unit, an indication of a degree of electrical dyssynchrony of a heart of the patient based on the calculated torso-surface activation times, wherein the indication comprises a value that quantifies the degree of electrical dyssynchrony of the heart, and wherein determining the indication of the degree of electrical dyssynchrony of the heart of the patient based on the calculated torso-surface activation times comprises determining a change in electrical dyssynchrony between first torso-surface activation times and the second torso-surface activation times; and presenting, by the processing unit, to a user, the indication of the degree of electrical dyssynchrony via a display, wherein presenting the indication of the degree of electrical dyssynchrony comprises presenting an indication of the change in electrical dyssynchrony.