measuring a pulse at a peripheral artery with a pulse sensor to determine pulse data;

outputting the pulse data as a pulse data set;

receiving the pulse data set with a programmable hardware device;

writing the pulse data set to a memory device as an instant in an arterial pulsation history;

reading the arterial pulsation history;

determining, with a microcontroller, at least one limit, including a pulse wave modulation value corresponding to a difference or ratio between systolic peak and diastolic hump in expansion of the peripheral artery based on the pulse sensor, from the arterial pulsation history;

writing the at least one limit to a non-transitory computer readable medium;

receiving one or more new pulse data sets;

calculating at least one new variable value from the one or more new pulse data sets;

comparing, with the programmable hardware device, the at least one new variable value to the at least one limit; and

outputting a prompt from the microcontroller via a user interface to the person if a predetermined number of instances of the at least one new variable value falls outside the at least one limit.