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.
Causes. Tricuspid valve regurgitation can have several causes. Tricuspid valve regurgitation is usually caused by the lower right heart chamber (right ventricle) bulging (dilating), which can lead to the tricuspid valve not working properly.ou may be diagnosed with this condition when having tests for other conditions. Signs and symptoms of tricuspid valve regurgitation may include: 1  Fatigue. 2  Declining exercise capacity. 3  Swelling in your abdomen, legs or veins in your neck. 4  Abnormal heart rhythms. 5  Pulsing in your neck.