A method of monitoring for changes in a health condition using a non-invasive blood pressure measuring device includes obtaining an acoustic signal from a blood vessel using an audio transducer, converting the acoustic signal to a blood pressure measurement, sampling the pressure measurement over a sample frequency, determining average pressure from the sampled pressure measurement over a target time period, monitoring the average pressure for deviation from a threshold pressure range, and generating an alert signal from the blood pressure measuring device if a deviation from the threshold pressure range is detected.