US Patent Number
A method for of delivering a defibrillation shock to a heart at an optimal time to stop ventricular fibrillation which involves obtaining an electrocardiogram of a heart in at least two directions, determining a time-coherency of the electrocardiogram based upon each of the at least two directions, and computing a tracking function from the time-coherency. An optimal time to apply a defibrillation shock to the heart is determined by locating a local maximum on the tracking function. The method utilizes spacia characteristics of the ventricular fibrillation. The method can be incorporated into implantable cardioverter defibrillators utilizing existing hardware technology.
University of Kentucky Research Foundation, Lexington, Ky.
Patwardhan, Abhijit R. and Leonelli, Fabio M., "Multidirectional ECG Coherent Optimal Timing of Defibrillation Shocks" (1998). Biomedical Engineering Faculty Patents. 5.