Abstract: A wrist alarm apparatus for use by a heart attack patient is provided that includes a maximum button and a minimum button laterally disposed on a housing part to respectively enter a maximum pulse rate limit and minimum pulse rate limit of a patient in a pre-set circuit for comparison with a patient's detected pulse rate in a comparator. An alarm device will produce a warning alarm, if the patient's pulse is equal to or higher than the maximum pulse rate limit or lower than the minimum pulse rate limit, to warn the patient or a nurse to take whatever actions are necessary.