3 ms·
The term is “cardio respiratory coupling”. Basically inspiration increases intrathoracic pressure which triggers the CV control mechanism to think BP is higher
by vrc 3y ago
The term is “cardio respiratory coupling”. Basically inspiration increases intrathoracic pressure which triggers the CV control mechanism to think BP is higher via the baroreflex and therefore lower HR. If you take an FFT/PSD of pulse waveforms you will actually see a distinct peak at the breathing frequency. This is how a lot of the finger sleep measurement devices work to track breathing without a chest strap.
- ultrarunner 3y agoThis is awesome. I love when people can find a signal in ostensibly disconnected data. This finally answers the nagging question I've had of how my watch can measure my rate of breathing. Thanks for sharing!
- eternauta3k 3y ago> inspiration increases intrathoracic pressure which triggers the CV control mechanism to think BP is higher via the baroreflex and therefore lower HR But HR is higher during inspiration.
- mpreda 3y ago> inspiration increases intrathoracic pressure which triggers the CV control mechanism to think BP is higher via the baroreflex and therefore lower HR It seems CRC raises HR during inspiration. From https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4052709/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4052709/ "The increase in HR during inspiration is referred to as respiratory sinus arrhythmia (RSA) and the increase in BP as Traube–Hering waves."