As aortic valve stenosis gets worse, you may have symptoms such as: 1  Chest pain or pressure (angina). 2  You may have a heavy, tight feeling in your chest. 3  Feeling dizzy or faint. 4  Feeling tired and being short of breath. 5  A feeling that your heart is pounding, racing, or beating unevenly (palpitations).s aortic valve stenosis gets worse, you may have symptoms such as: 1  Chest pain or pressure (angina). 2  Feeling dizzy or faint. 3  Feeling tired and being short of breath. 4  A feeling that your heart is pounding, racing, or beating unevenly (palpitations).
For the similarly named bird, see Killdeer. For the similarly named city, see Killdeer, North Dakota. Kildeer is an affluent village in Lake County, Illinois, United States. It is a suburb of Chicago. The population was 3,968 at the 2010 census.
DuPage County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 916,924, making it the second-most populous county in Illinois. Its county seat is Wheaton. Dupage County is one of the collar counties of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area. The majority of DuPage County is in the 630 and 331 area codes. However, the areas of the county that are in the city of Chicago are in area code 773, primarily part of O'Hare International Airport.