Abstract：Objective To investigate the correction effect of different QT interval correction formulas applied in various ranges of heart rate. Methods A total of 699 778 ECGs with heart rate ranged from 30 to 200 times/min were selected from the ECG-ViEW database (a public information platform of ECGs). These ECGs were divided into four groups including 30-60, 60-100, 100-150 and 150-200 times/min groups according to the heart rate. The QT interval was corrected by Bazett, Fridericia, Framingham and Hodges formulas respectively. The linear relationship between QTc and heart rate or measured QT interval value was analyzed within different ranges of heart rate and by using different formulas. Results The uncorrected QT interval is prolonged as the heart rate slows down. The Bazett formula shows a poor performance in correcting QT interval, especially in the population with too slow heart rate. The Hodges formula shows a better correction effect among the population with low heart rate but a poor correction effect in those with fast heart rate. The Fridericia and Framingham formulas have better correction effects in the population with normal and fast heart rate. Conclusion The Bazett formula commonly used in clinical practice has some defects in QT interval correction. The Hodges formula shows greater practical value for the patients with low heart rate. The Fridericia and Framingham formulas are more suitable for correcting the ECGs with normal or fast heart rate.
李媛，张凤至，徐宗政，王悦，陈舒宁，李祥东，王德国. 基于ECG-ViEW数据库的QT间期校正方法比较[J]. 实用心电学杂志, 2023, 32(5): 313-318.
LI Yuan, ZHANG Fengzhi, XU Zongzheng, WANG Yue, CHEN Shuning, LI Xiangdong, WANG Deguo. Comparison of QT interval correction methods based on ECG-ViEW database. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2023, 32(5): 313-318.
