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.
A Riverside Heart and Vascular Center answered. Aortic regurgitation (AR) is also known as aortic insufficiency (AI). It is a condition in which the aortic valve in the heart does not close completely. Because the valve never closes completely, blood leaks backward from the aorta into the left ventricle. Riverside Heart and Vascular Center answered. Aortic regurgitation (AR) is also known as aortic insufficiency (AI). It is a condition in which the aortic valve in the heart does not close completely. Because the valve never closes completely, blood leaks backward from the aorta into the left ventricle.