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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Col between Harper and Yokum knobs, Randolph County. - elevation. Map of the Monongahela River basin, with Dry Fork highlighted. The Dry Fork is a 39.1-mile-long (62.9 km) tributary of the Black Fork of the Cheat River in the Allegheny Mountains of eastern West Virginia, USA. Via the Black Fork, the Cheat, and the Monongahela and Ohio rivers, it is part of the watershed of the Mississippi River.