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
Symptoms of aortic valve regurgitation include: 1  Shortness of breath, especially with activity. 2  Fatigue and weakness. 3  Fainting (syncope). 4  Trouble breathing at night. 5  Swelling in the legs and sometimes the rest of the body (edema). 6  Awareness of the heartbeat (palpitations), especially when lying on the left side.
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.