 Heart rate variability, HRV, is a measure of how quickly the heart rate changes over time. It is measured by ECG Holter monitoring, which is the gold standard for determining HRV. Recent advances in technology have allowed for the development of devices that use photoplethysmography to determine HRV, providing additional information such as heart rate, blood pressure, peripheral oxygen saturation, step counting, physical activity, and sleep monitoring. Smartwatches and chest strap monitors are two examples of these devices. The use of technology and self-monitoring of HRV can be beneficial in screening for cardiovascular disease and reducing pressure on medical services in hospitals. Additionally, telemedicine could be an effective tool for assessing elderly patients with walking disorders, frailty, or neurocognitive disorders. This article was authored by Anna-Maria Turku, Adina Karmanili, Ramona Stefaniou, and others. We are article.tv. Links in the description below.