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If I'm reading this correctly, "audioplethysmography" is more than heart rate. It's a plot of the actual functioning of the heart, and can detect problems with
by fortran77 3y ago
If I'm reading this correctly, "audioplethysmography" is more than heart rate. It's a plot of the actual functioning of the heart, and can detect problems with valves, irregular heartbeat, clogged arteries, etc, too.
- wyldfire 3y agoIt might be clearer for them to say that Google could make another device using the same BOM as the earbud. The title made me think that it only required custom software.
- rsaxvc 3y agoIt seems a lot like photoplethysmograph (PPG), in that you get a time domain signal of something related to instantaneous capillary blood pressure, and you process that signal to derive heart rate, and sometimes HRV and other things. The APG transducer is a microphone rather than a PPG LED+photodiode optical pickup. I don't know how far you could take it though. Irregular heartbeat in a resting patient, possibly. Clogged artery not in the measurement path in an active patient - probably not. The further from the heart the less and less it looks like an ABP blood pressure wave. I bet activities like jumping up and down would show some amount of interference from blood sloshing around in APG just like in PPG. If you want to look at some data, https://physionet.org/ https://physionet.org/ has some recordings of PPG and ABP and you can see how they differ. (Edit) like this one: https://physionet.org/content/mimic3wdb-matched/1.0/ https://physionet.org/content/mimic3wdb-matched/1.0/