This project aims to provide data which may add to the existing literature regarding the use of telemedicine for safe transfer of ultrasound data of relatively inexperienced users for qualitative and quantitative interpretation by experts at a different location. The authors will study whether diffusion of focused cardiac ultrasound to outpatient heart failure clinics with support of cardiologist provided by telemedicine is feasible and provides reliable data. Firstly, the investigators will study the use of high-end ultrasound machines connected to a wired broadband network with a CE-classified software providing safety and anonymization of all transferred data.