These are all diagnostic tests used to evaluate different aspects of heart function and structure:

1. Electrocardiogram (EKG or ECG): This test records the electrical activity of your heart over a period of time using electrodes placed on your skin. It helps diagnose abnormal heart rhythms (arrhythmias), heart attacks, and other heart conditions.

2. Cardiac Echo (Echocardiogram): This is an ultrasound test that uses sound waves to create detailed images of your heart’s structure and how well it’s functioning. It can show the size and shape of your heart, how well your heart chambers and valves are working, and can help identify areas of poor blood flow to the heart muscle.

3. X-ray: X-ray refers to electromagnetic radiation that has a shorter wavelength and higher energy than visible light. It can penetrate various materials to varying degrees. X-rays are widely used in medicine for diagnostic imaging, such as detecting fractures or abnormalities in bones, and in industry for purposes like inspecting welds. They were discovered by Wilhelm Conrad Röntgen in 1895 and have since become indispensable in both medical and scientific fields. A chest X-ray can provide images of the structures in your chest, including your heart, lungs, and bones. It can be used to identify heart size, shape, and the presence of lung congestion or fluid around the heart.

These tests are often used together to provide a comprehensive evaluation of heart health and to diagnose various cardiac conditions. If you have specific concerns or need more detailed information about any of these tests, feel free to ask!