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.
If the Q wave appears within about 6 hours of a transmural MI, it is an ominous sign. If the Q wave is more than 0.04 seconds long, it is a sign of necrosis. In an inferior MI, the Q wave should not exceed 0.03 seconds or it is indicative of necrosis.