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.
aortic regurgitation. the flow of blood from the aorta back into the left ventricle during diastole, resulting from a failure of the aortic valve to close completely. Also called aortic insufficiency. Effects of aortic regurgitation. Abnormal back flow of blood from the aorta through the aortic valve. In developing countries the valvular defect is mainly due to as complication of rheumatic fever; in Western countries the defect is usually congenital.