Hardware design of ECG data logger

The cardiovascular disease is a serious problem in the world. The early diagnosis of heart disease leads to minimization of deaths. The analysis of electrocardiogram (ECG) patterns and cardiac frequency is used for detecting arrhythmias and discovering the nature of disease.. In many cases patients encounter heart problems (pain, sudden change of heart beat) but no longer have an ECG device and/or equipment for measurement. These drawbacks can be overcome using an ECG logger. In this paper it is described hardware design of one-lead ECG data logger. The designed ECG logger is small and compact device without any cables - it is a miniature, hand-held device with fixed electrodes for fingers. Measured data are stored on built-in microSD memory card and then transferred to PC via USB connection.