<qa>  What is the QT interval corrected for heart rate according to Fridericias formula- The QT interval corrected QTc for heart rate according to Fridericias formula QTcF. QTcF 450 milli second msec. Other calculation methods e.g. QT interval corrected for heart rate according to Bazetts formula QTcB, individually corrected QT interval QTcI machine-read or manually over-read are not acceptable. 