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Camera Heart Rate Variability 1.1.4
Camera Heart Rate Variability is the first app that lets yourecord,plot and export time and frequency domain Heart RateVariabilityFeatures (as well as heart rate and RR intervals),without requiringany heart rate monitor. Camera HRV uses atechnique calledphotoplethysmography (PPG for short), whichconsists in detectingchanges in blood volume during a cardiaccycle, by illuminating theskin and measuring changes in lightabsorption. PPG has become quitea popular non-invasive method forextracting physiologicalmeasurements such as heart rate and oxygensaturation. However, mostapplications today focus simply on heartrate or respiration rate.Camera HRV can assess cardiac autonomicregulation throughquantification of sinus rhythm variability.Since HRV aims atquantifying autonomic regulations, it can be usedas marker ofsympathetic or parasympathetic predominance, andtherefore becomerelevant in many applications. In athletes forexample heavytraining is responsible for shifting the cardiacautonomic balancetoward a predominance of the sympathetic over theparasympatheticdrive, and HRV analysis attempts to quantify thisshift. Otherapplications span from stress monitoring, assessmentof pathologicalconditions and even emotional regulation duringfinancialdecision-making. Main Features: - extracts, plots, storesandexports heart rate, rr-intervals, time and frequency domainheartrate variability features (AVNN, SDNN, rMSSD, pNN50, LF, HF,LF/HF)- configurable time window for feature extraction (30seconds to 1minute) - automatic RR-interval correction - dataexport/storage onDropbox or via email (csv format, exports rrintervals, and computedfeatures). Find out more at thislink:http://www.marcoaltini.com/2/post/2014/01/heart-rate-variability-using-the-phones-camera.html
