Patent ID: 7991460

Claim:
A cardiac event detection system for detecting a cardiac event in a patient comprising: (a) at least two sensors for sensing an analog signal from said patient's heart; (b) a device coupled to said sensors, said device having an analog-to-digital circuit system contained therein for digitizing said analog signal to produce a digitized waveform; (c) a processor contained in said device and electrically coupled to said analog-to-digital circuit system, said processor configured to: (i) compute from the digitized waveform heart rate information; (ii) based on the heart rate information, determine whether a change in heart rate has occurred; (iii) responsive to a determination that a change in heart rate has occurred, determine the relative time the change in heart rate occurred; (iv) responsive to the determination that a change in heart rate has occurred, based on the relative timing of the change in heart rate, selectively apply a first test to detect a cardiac event.