MSS: Mass Storage System: MSS: Manufacturers Standardization Society: MSS: Multiple Sclerosis Society: MSS: Maxtor Shared Storage: MSS: Mission Support Squadron: MSS: Multi-Spectral Scanner: MSS: Merit System Services: MSS: Mobile Servicing System: MSS: Ministry of State Security (Chinese counterintelligence organization) MSS: Management Support System: MSS: Maternal Serum Screening: MSS
However, as aortic valve regurgitation worsens, signs and symptoms may include: 1  Fatigue and weakness, especially when you increase your activity level. 2  Shortness of breath with exertion or when you lie down. 3  Swollen ankles and feet (edema). 4  Chest pain (angina), discomfort or tightness, often increasing during exercise.
Watch an animation of mitral valve regurgitation. A leaking mitral valve allows blood to flow in two directions during the contraction. Some blood flows from the ventricle through the aortic valve â as it should â and some blood flows back into the atrium.f regurgitation is severe enough, the forward flow of blood is reduced enough to cause heart failure (when the heart does not pump enough blood to the body) which may produce also symptoms ranging from shortness of breath during exertion, coughing, congestion around the heart and lungs, swelling of the legs and feet.