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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Cypress Creekâs two Lexington County solar projects are expected to be fully operational by the end of 2016. About Cypress Creek Renewables Cypress Creek Renewables is pursuing opportunities across the United States. Our business model is primarily focused on utility-scale ground mount projects from 2-10MW AC in capacity.