The QT interval comprises the QRS-complex, the ST-segment, and the T-wave. One difficultly of QT interpretation is that the QT interval gets shorter as the heart rate increases. Thus at a heart rate of 60 bpm, the RR interval is 1 second and the QTc equals QT/1.
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The Tennessee River begins at theconfluence of the Holston and FrenchBroad Rivers near Knoxville, TN. Itthen bends south out of the Appalacian Mountains, cuts acrossthe northern quarter of Alabama and turns north to join theOhio River near Paducah, KY. The rivers within theTennessee Basin flow through 123 counties of 7 states (11VA, 63 TN, 15 NC, 9 GA, 15 AL, 3 MS and 7 KY).