What is Electrocardiogram (ECG)?

Overview

An electrocardiogram, often abbreviated as ECG, is a diagnostic tool used to assess the heart's electrical activity. During the test, small electrodes are placed on the skin to detect electrical signals produced by the heart as it beats. These signals are then recorded and displayed as waves on a monitor or printed on paper, allowing healthcare providers to analyze the heart's rhythm and detect any irregularities. The ECG works by measuring the timing and strength of the electrical signals that trigger heartbeats. Each wave on the ECG represents a specific phase of the heart's electrical cycle, including the contraction and relaxation of the heart muscles. This information is crucial in diagnosing conditions such as arrhythmias, heart attacks, and other cardiac issues, making the ECG a vital tool in cardiovascular medicine. For example, if a person experiences chest pain or shortness of breath, a doctor may order an ECG to quickly evaluate the heart's condition. The test is non-invasive, quick, and can provide immediate insights into the heart's health, which is essential for timely treatment. Understanding the heart's electrical activity through an ECG helps in maintaining overall cardiovascular health and can guide further medical decisions.