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.
Every time the heart beats, it is due to an electrical impulse that spreads across. the heart muscle causing it to contract. The QT interval is measured on the 12. lead surface Electrocardiogram (ECG) which is a recording of the electrical. activity of the heart. The QT interval is the time taken for the heart to.