Abstract: A microprocessor (300) with a date and time clock gathers time interval data (80, 86). The duration of the time intervals in an electrocardiogram, or pulses are recorded. Stress data accumulated for the user are down loaded to a PC (301). The battery power pack (303) supplies electricity to operate the components (80-318). The user's stress status is displayed on a liquid crystal diode (302), and the voice microprocessor (318) broadcasts from a microspeaker CPR instructions. If the battery (303) has less than a 20% charge, a buzzer (304) notifies the user.

Abstract: The duration of Time Intervals, preferably 101, in an electrocardiogram, or pulses are recorded. The Mode, ?Mo!, or the duration most often recorded, the Median, ?M!, of all durations recorded, the Amplitude of the Mode, ?AMo!, expressed as a percentage of the most frequently recorded Modes, and the difference in duration between the longest and the shortest duration recorded, Delta X, ?DX!, are determined and consolidated into one or more Cluster Modes, ?CMo!, comprised of three Modes each, establishes a user's baseline. If any of the 9 formulas derived from these functions differs by a predetermined percentage and time duration from the user's baseline, then the user's stress has reached an ALARM level. The apparatus make take the form of a chest strap on which are mounted electrocardiogram electrodes, which transmits Time Intervals to a wrist watch like device where the calculations are performed and the results displayed.