Electrocardiography is one of most basic laboratory tests in cardiology. Novel mobile ECG are becoming popular. The investigators aim to compare typical electrocardiographic measurements obtained with mobile ECG devices (Alivecor Kardia and Alivecor Cardia 6L) and 12-leads standard ECG (gold standard). The recordings will be compared by cardiologist paying special attention to heart rhythm disturbances, components of ECG curve and quality of recording.~ECG evaluation will include: rhythm description, measurements of mean RR, PR, QRS, QT, QTc and ST-T description. Additionally inter/intraventricular conduction abnormalities are to be determined from 12-leads ECG and approximate from mobile ECG recordings.
Electrocardiography is one of most basic laboratory tests in cardiology. Novel mobile ECG are becoming popular. The investigators aim to compare typical electrocardiographic measurements obtained with mobile ECG devices (Alivecor Kardia and Alivecor Cardia 6L) and 12-leads standard ECG (gold standard). The recordings will be compared by cardiologist paying special attention to heart rhythm disturbances, components of ECG curve and quality of recording.