Electrocardiograms (ECG) are devices that doctors can use to record the heart’s electrical activity. Portable devices are also available for people who wish to monitor their heart health at home.

A doctor may refer to an electrocardiogram as an “ECG” or “EKG.” It uses electrodes to measure the electrical activity of the heart. This can help medical professionals detect heart abnormalities, ...

Of all the electrical signals generated by the human body, those coming from the heart are probably the most familiar to the average person. And because it’s also quite simple to implement the ...