Is the Bazett Formula Suitable for Frequency Correction of the QT Interval (QTc) in Childhood?
Abstract
All articles of this category (opens in new window) Background: The QT interval in the ECG is a central parameter for assessing electrical heart activity, and an altered QT interval is associated with an increased risk for cardiac arrhythmias. Since the QT interval depends on the heart rate, a frequency correction is performed using the Bazett formula, which has been derived from a few healthy adults and tends to overestimate and lead to overdiagnosis of Long QT syndrome at high heart rates. Methods: Manual analysis of 1,036 resting ECGs from subjects aged 6 to 47 years. QTc times were calculated using all 28 known formulas. The correlation between QTc and heart rate was analyzed for the overall range and in four heart rate categories (
Fields of Study & Subjects
Cardiac electrophysiology and arrhythmias
ECG Monitoring and Analysis
Heart Rate Variability and Autonomic Control
Publication details
- Journal / source
- The Thoracic and Cardiovascular Surgeon
- Volume
- 74
- Issue
- S 02
- Pages
- S71–S98
- Publication date
- 1 January 2026
- Language
- EN