Echocardiography is a medical imaging technique that uses sound waves to create pictures of the heart. It helps doctors assess the heart's structure and function, including the size of the chambers, the condition of the valves, and the flow of blood. This non-invasive test is commonly used to diagnose various heart conditions. During an echocardiogram, a technician places a small device called a transducer on the patient's chest. The transducer emits sound waves that bounce off the heart and return to the device, creating real-time images. This procedure is safe, painless, and does not involve radiation.