A 10-year-old Hispanic female is brought to the clinic by her mother for evaluation of a skin rash and some recent unusual behavior. Over the last several weeks, her daughter has developed rapid,...

A 10-year-old Hispanic female is brought to the clinic by her mother for evaluation of a skin rash and some recent unusual behavior. Over the last several weeks, her daughter has developed rapid, irregular, jerky movement of her extremities. She also notes that her daughter has been walking more slowly recently, and seems to be favoring her right knee. On physical exam, the patient has a newonset murmur. Her findings are classic. You forgo the confirmatory tests and explain to her mother that the patient has what valvular abnormality?

A. Atrial stenosis

B. Atrial regurgitation

C. Mitral valve prolapse

D. Rheumatic valvular disease