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.
The T wave: The T wave represents the wave of repolarization, as the ventricle prepares to fire again. The T wave is normally upright in leads I, II, and V3-V6. It is normally inverted in lead R. Ts are variable in the other leads (III, L, F, and V1-V2). T wave abnormalities may be seen with, or without ST segment abnormality.