The Southern Cheyenne, known in Cheyenne as HeÃ©vÃ¢hetaneo'o meaning Roped People, together with the Southern Arapaho, form the Cheyenne and Arapaho Tribes, in western Oklahoma. Their combined population is 12,130, as of 2008.
In cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle. The QT interval represents electrical depolarization and repolarization of the ventricles. A lengthened QT interval is a marker for the potential of ventricular tachyarrhythmias like torsades de pointes and a risk factor for sudden death.
How to measure QT. 1  The QT interval should be measured in either lead II or V5-6. 2  Several successive beats should be measured, with the maximum interval taken. 3  Large U waves (> 1mm) that are fused to the T wave should be included in the measurement.  Smaller U waves and those that are separate from the T wave should be excluded.