Not Another Formula for Heart Rate Correction of QT Interval
نویسندگان
چکیده
منابع مشابه
QT Interval: Correction for Heart Rate
There are several empirically based proposals in the literature for adjusting QT intervals for heart rate. Two widely used correction formulas are Bazett’s and Fridericia’s. This study examines the general formulation of heart rate correction of QT intervals, and several of the existing adjustments are used with this approach. Simple correction formulas for both populations and individuals have...
متن کاملCriteria for short QT interval based on a new QT-heart rate adjustment formula
BACKGROUND A short QT interval, within which an increased risk for atrial fibrillation and/or fatal cardiac arrhythmias occurs, has been difficult to define. METHODS The lower percentiles of a new QTc formula were determined, using a precise mathematical fitting of the QT-heart rate relationship from the ECGs of 13,600 individuals from the NHANES II and III surveys. RESULTS The QTc interval...
متن کاملAssessment of the stability of the individual-based correction of QT interval for heart rate.
BACKGROUND Modeling the relationship between QT intervals and previous R-R values remains a challenge of modern quantitative electrocardiography. The technique based on an individual regression model computed from a set of QT-R-R measurements is presented as a promising alternative. However, a large set of QT-R-R measurements is not always available in clinical trials and there is no study that...
متن کاملComparison of formulae for heart rate correction of QT interval in exercise ECGs from healthy children.
OBJECTIVE To investigate the differences in four formulae for heart rate correction of the QT interval in serial ECG recordings in healthy children undergoing a graded exercise test. SUBJECTS 54 healthy children, median age 9.9 years (range 5.05-14.9 years), subjected to graded physical exercise (on a bicycle ergometer or treadmill) until heart rate reached > 85% of expected maximum for age. ...
متن کاملA new physiological method for heart rate correction of the QT interval.
AIM To reassess QT interval rate correction. BACKGROUND The QT interval is strongly and inversely related to heart rate. To compare QT intervals between different subjects with different heart rates requires the application of a QT interval rate correction formula. To date these formulae have inappropriately assumed a fixed relation between QT interval and heart rate. An alternative method of...
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ژورنال
عنوان ژورنال: Annals of Noninvasive Electrocardiology
سال: 2009
ISSN: 1082-720X,1542-474X
DOI: 10.1111/j.1542-474x.2008.00277.x