How do you calculate QTc intervals in patients being admitted for AAD drug loading who remain in atrial fibrillation or atrial flutter?   

We measure 10 R-R intervals and the corresponding 10 QT intervals, average each of them, and then calculate the QTc. Bazett’s formula is commonly used, but is probably less accurate than other correcting formulae, particularly for patients actively in atrial fibrillation. We often use the Fram...