Patent ID: 8874197

Claim:
A system for determining a risk of a potentially near fatal ventricular arrhythmia of a patient, comprising: an implantable medical device configured to: obtain an electrocardiogram of a heart of said patient; measure, using said electrocardiogram, a parameter indicative of a local conduction system of said heart of said patient; measure, using said electrocardiogram, a parameter indicative of a global autonomic nervous system of said patient; said system being configured to: assign a numeric score for said parameter indicative of said local conduction system of said heart of said patient; assign a numeric score of said parameter indicative of said global autonomic nervous system of said patient; calculate a ratio of said numeric score of said parameter indicative of said local conduction system of said heart of said patient with said numeric score of said parameter indicative of said global autonomic nervous system of said patient; take an action responsive to said risk of said potentially near fatal ventricular arrhythmia of said patient being significant if said ratio is greater than a predetermined threshold.