Once we shifted to the Heartool app, we were able to track heart rate variability (HRV) data over time. The simple chest strap design ... color LED notification system gives real-time HR zone ...

Objective: Heart rate (HR) variability is an important factor for ... sick sinus syndrome classified according to the Rubenstein system. Methods: Patients received cilostazol (100 or 200 mg ...

Statistics like resting heart rate, V02 max (maximal oxygen consumption) and heart rate variability (HRV ... is a window into the autonomic nervous system. The autonomic nervous system consists ...

In addition to lower heart rate variability, the researchers observed a predominance of the sympathetic nervous system over the parasympathetic nervous system in volunteers infected with SARS-CoV-2.