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.
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.