Patent ID: 8275457

Claim:
A cardiac monitoring device for analyzing electrical signals from the heart to detect ischemic events, including: at least one sensor designed to collect the electrical signal from the heart; electrical circuitry coupled to the sensor and configured to amplify and digitize the electrical signal to produce sensed data; memory storage coupled to the electrical circuitry to store the sensed data; a processor configured to: analyze the sensed data in the memory storage; distinguish between beat types including a first beat type and a second beat type and measure at least one feature of beats associated with the first and second beat types, respectively; and determine a first ischemic measure based upon a first number of beats of the first beat type, if said first ischemic measure is less than a first predetermined value then determining a second ischemic measure based upon a second number of beats of the second beat type, and if said second ischemic measure is less than a second predetermined value, then determining a third ischemic measure based upon the sum of the first and second ischemic measures, and if said first, second or third ischemic measures are greater than respective first, second or third predetermined values sending an alarm signal.