QTcB - Bazett's Correction Formula

**Semantic type:** Quantitative Concept

**Definition:** A formula which takes into account the physiologic shortening of the QT interval which occurs as the heart rate increases, permitting comparison of the QT interval across a range of rates. It is mathematically defined as: QTcB = QT/SqRootRR(seconds) and theoretically corrects the QT interval to that which would be observed at a heart rate of 1 cycle per second.

**Synonyms:** - Bazett's Correction Formula