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ECG (Electrocardiogram) is a quick, painless, and non-invasive test that records the electrical activity of the heart. Small electrodes placed on the skin detect the heart’s electrical signals, which are then displayed as wave patterns on a monitor or paper. These patterns help doctors assess heart rhythm, identify irregularities, and detect early signs of heart disease. ECG is commonly used to evaluate symptoms like chest pain, palpitations, dizziness, shortness of breath, or as part of routine heart checkups.