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.
Current Texas Weather, Interesting Texas Weather Facts, Tornado Data, City Climate Descriptions and Climate Data. The coldest location in Texas is Dalhart in the Texas Panhandle with an annual temperature of 56.1 F degrees. The hottest location is Mc Allen in the Texas Valley with an annual temperature of 74.1 F. The highest monthly average occurs during June in Presidio with 102.1 F, and the lowest occurs in Dalhart during January with an average temperature of 19.4 F. The wettest location in Texas is Orange in southeast Texas with an annual precipitation average of 59.1 inches. The driest location is El Paso, the westernmost city in Texas, with an annual average of 8.67 inches.