Patent ID: 8682436

Claim:
A method for selecting a target vein for left ventricular lead placement for cardiac resynchronization therapy, comprising: marking timing of a fiducial of electrical activity of the heart; determining a myocardial activation time, relative to the timing of the fiducial, at each of a plurality of locations in or along a first coronary vein overlying a left ventricle; determining an electrical dispersion for the first coronary vein, wherein determining the electrical dispersion comprises calculating the difference between (i) the activation time at the location that had the latest activation time of the plurality of locations and (ii) the activation time at the location that had the earliest activation time of the plurality of locations; determining whether the magnitude of the electrical dispersion for the first vein meets or exceeds a predetermined high threshold; and identifying the first vein as the target vein for left ventricular lead placement if the electrical dispersion for the vein meets or exceeds the predetermined high threshold.