A 40-year-old woman had several episodes of rheumatic fever as a child. She is currently afebrile and feels well, and has come to a hospital for monitoring echocardiography. Which of the following findings would MOST likely be seen in this patient's mitral valve?
Ballooning of valve leaflets Fibrous bridging between thickened, calcified leaflets Irregular beads of calcification in annulus Large bulky vegetation with adjacent leaflet perforation