|
Abstract Objective To explore the effect of different correction methods of QT interval in patients with atrial fibrillation (AF) separately at AF and sinus rhythms. Methods The ECGs of AF patients both with AF and sinus rhythms were selected from the public information platform ECG-ViEW database. The correction effect of Bazett, Fridericia, Framingham and Hodges formulas is compared and analyzed for the same patient separately at AF and sinus rhythms. The linear relationship between QTc corrected by different formulas and heart rate or the measured value of QT interval was analyzed. ResultsThere is a statistically significant difference in the QT interval among AF patients during AF and sinus rhythme[(374.57±67.73) ms vs. (396.71±55.68) ms, P<0.01]. The QTc corrected by Hodges formula does not vary significantly between the two rhythms. Its slope of the regression line to the heart rate is very small, and the QTc corrected by Hodges formula shows a good linear relationship with the measured value of QT interval. The QTc corrected by commonly used Bazett formula in clinical practice shows a positive linear relationship with the measured value of QT interval. Conclusion Commonly used Bazett, Fridericia and Framingham formulas lead to poor performances in correcting QT interval of ECGs during AF rhythm. The effect of Hodges formula on correcting QT interval is close separately at AF and sinus rhythms, which could greatly reduce the influence of heart rate on QT interval. Hodges formula is universal in the population, and makes a good clinical indicator for monitoring the prolongation of QT interval in AF patients.
|
|
|
|
|
|
|