Calculating QT interval duration Count the number of squares from the beginning of the QRS complex to the end of the T wave. Multiply this number by 0.04 second. The normal range is 0.36 to 0.44 second, or 9 to 11 small squares wide.alculating QT interval duration Count the number of squares from the beginning of the QRS complex to the end of the T wave. Multiply this number by 0.04 second. The normal range is 0.36 to 0.44 second, or 9 to 11 small squares wide.
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Flat Creek Township, Barry County, Missouri. (Redirected from Flat Creek, Missouri) Flat Creek Township is one of twenty-five townships in Barry County, Missouri, United States. As of the 2000 census, its population was 5,462. Flat Creek was organized in 1844, taking its name from Flat Creek.