What is HRV? HRV (Heart Rate Variability) is the measurement of the variation in time (in milliseconds) between two consecutive heartbeats. A high HRV reflects the autonomic nervous system's ability to switch flexibly between "stress" mode (sympathetic) and "recovery" mode (parasympathetic). Therefore, HRV is an excellent indicator of the overall stress level our body is […]

The Context of Empty Nose Syndrome (ENS) In people with Empty Nose Syndrome (ENS), the sensation of airflow is often absent or altered, largely due to a loss of wall shear stress (WSS), the mechanical force exerted by air as it flows along the nasal walls, which is sensed by receptors in the mucosa. This […]

In the previous article I showed you a device for visualize your breathing. In this article I will show you how to use it as a sleep breathing recorder in order to detect hypopnea and apnea. For it, I have just connected the microcontroller arduino to the PC with a USB cable and use two […]

Empty Nose Syndrome can affect your sleep in some ways.Some people wake up after one or two hours because the nose becomes dry.But I think that the first reason ENS affects our sleep is because it creates central sleep apnea. So what is central sleep apnea ? It is a respiratory problem which occurs when […]