Margerey (J Path Bact 1949; 61:203-208) studied 250 mitral valves and postulated that the mechanism of formation is intimal damage due to mechanical trauma at the leaflet coaptation. The damaged area is covered by fibrin, which subsequently becomes uplifted, or partially detached from the valve surface.
Irving, TX Current Weather and Forecast. Irving, TX Weather Forecast. 3:20 PM CDT SAT APR 15 2017. TONIGHT - Partly cloudy this evening - then becoming mostly cloudy. Lows in the mid 60s. South winds 5 to 10 mph.
The weather is screwy this year. West Texas has had a lot of rain, but here in Fort Worth-Dallas, we've had a very dry summer with water restrictions, and 43 days at or above 100 degrees (average 16). It has finally cooled off, and it's pleasant, but it's way too early to say that it won't get hot again. Excuse me while I go do a rain dance.