Mitral Regurgitation is a heart condition where the mitral valve does not close properly, allowing blood to flow backward from the left ventricle into the left atrium during heartbeats. This can lead to increased pressure in the heart and lungs, causing symptoms like shortness of breath and fatigue. The condition can be caused by various factors, including rheumatic fever, heart valve prolapse, or coronary artery disease. Diagnosis typically involves an echocardiogram, which uses sound waves to create images of the heart, helping doctors assess the severity and determine the best treatment options.