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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Walnut Creek, Ohio is GMT/UTC - 5h during Standard Time Walnut Creek, Ohio is GMT/UTC - 4h during Daylight Saving Time: Daylight Saving Time Usage: Walnut Creek, Ohio does utilize Daylight Saving Time. Daylight Saving Start Date: Walnut Creek, Ohio starts Daylight Saving Time on Sunday March 11, 2018 at 2:00 AM local time. Daylight Saving End Date: Walnut Creek, Ohio ends Daylight Saving Time on