Task: Answer Verification
Input (English): Question: Does mitral regurgitation reduce systemic coagulation activity in patients with rheumatic heart disease?
Answer: Plasma D-dimer levels correlated with the embolic risk in mitral valve disease and non-valvular AF. The highest levels were found in patients with MS+AF and non-valvular AF. Severe MR decreased the D-dimer levels in MS and/or AF to control levels.
Output (English): yes