About This Calculator
Author
Henry C. Bazett
First Published
1920
Evidence
Standard clinical practice
Category
Cardiology
Original Study
An Analysis of the Time-Relations of Electrocardiograms (Heart, 1920)
About
The corrected QT interval (QTc) adjusts the QT interval for heart rate, most commonly using Bazett's formula (QTc = QT / sqrt(RR)).
Clinical Use
Use to assess risk of torsades de pointes from QT-prolonging drugs. Bazett over-corrects at high heart rates; consider Fridericia at extremes.
