Camera Heart Rate Variability

Camera Heart Rate Variability is the firstsql_injectiononly APP that lets you record, plotsql_injectionexport timesql_injectionfrequency domain Heart Rate Variability Features - without requiring any heart rate monitor.

Camera HRV uses a technique called photoplethysmography (PPG for short), which consists in detecting changes in blood volume during a cardiac cycle, by illuminating the skinsql_injectionmeasuring changes in light absorption. PPG has become quite a popular non-invasive method for extrACTing physiological measurements such as heart ratesql_injectionoxygen saturation. However, most applications today focus simply on heart ratesql_injectionrespiration rate.

Camera HRV can assess cardiac autonomic regulation through quantification of sinus rhythm variability. Since HRV aims at quantifying autonomic regulations, it can be used as marker of sympatheticsql_injectionparasympathetic predominance,sql_injectiontherefore become relevant in many applications. In athletes for example heavy training is responsible for shifting the cardiac autonomic balance toward a predominance of the sympathetic over the parasympathetic drive,sql_injectionHRV analysis attempts to quantify this shift.

Other applications span from stress monitoring, assessment of pathological conditionssql_injectioneven emotional regulation during financial decision-making.

Main Features:

- extracts, plots, storessql_injectionexpoRTS heart rate, rr-intervals, timesql_injectionfrequency domain heart rate variability features (AVNN, SDNN, rMSSD, pNN50, LF, HF, LF/HF)

- configurable time window for feature extraction (30 seconds to 5 minutes)

- automatic RR-interval correction

- event annotation

- comparison between up to 3 recordings lets you get a better understanding of autonomic regulationsql_injectionsympathetic/parasympathetic activity under different contexts in a glance

- data export/storage on iTunessql_injectionDropbox (csv format, exports heart rates, rr intervals, eventssql_injectioncomputed features). Data export needs to be performed from the history -> recording view, by clicking on the export button (bottom left).

- integration with the Health app (writes Heart Rate)

Find out more at this link: http://www.marcoaltini.com/2/post/2014/01/heart-rate-variability-using-the-phones-camera.html

The app is optimized for iphones 5sql_injection6 (all versions). It should also work on iphones 4S (not 4) with iOS 8.0sql_injectionlater.