what is ecg in medical terms

An electrocardiogram (ECG or EKG) is a medical test that records the electrical signals in the heart. It is a simple, non-invasive procedure that can help diagnose certain heart conditions by measuring the electrical activity of the heart. During an ECG, up to 12 sensors (electrodes) are attached to the chest and limbs, which record the electrical signals that make the heart beat. A computer records the information and displays it as waves on a monitor or on paper. An ECG can help detect arrhythmias, coronary heart disease, heart attacks, and cardiomyopathy. It is often used alongside other tests to help diagnose and monitor conditions affecting the heart. An ECG is a painless, non-invasive way to help diagnose many common heart problems.