Journal ArticleDOI
A comparison of commonly used QT correction formulae: the effect of heart rate on the QTc of normal ECGs.
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TLDR
Certain subgroup correlations of gender and low, mid, or high HR show that one individual formula can out-perform the others, whereby automated selection of QT correction formula based on the patient's HR and gender could be implemented as another option in products.About:
This article is published in Journal of Electrocardiology.The article was published on 2004-10-01. It has received 402 citations till now. The article focuses on the topics: QT interval.read more
Citations
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Journal ArticleDOI
AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram: part III: intraventricular conduction disturbances: a scientific statement from the American Heart Association Electrocardiography and Arrhythmias Committee, Council on Clinical Cardiology; the American College of Cardiology Foundation; and the Heart Rhythm Society. Endorsed by the International Society for Computerized Electrocardiology.
TL;DR: The present article introduces the second part of “Recommendations for Standardization and Interpretation of the Electrocardiogram”, a project initiated by the Council on Clinical Cardiology of the American Heart Association and endorsed by the American College of Cardiology.
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Modelling the long QT syndrome with induced pluripotent stem cells
Ilanit Itzhaki,Leonid Maizels,Irit Huber,Limor Zwi-Dantsis,Oren Caspi,Aaron Winterstern,Oren Feldman,Amira Gepstein,Gil Arbel,Haim Hammerman,Monther Boulos,Lior Gepstein +11 more
TL;DR: The ability of human iPSC technology to model the abnormal functional phenotype of an inherited cardiac disorder and to identify potential new therapeutic agents represents a promising paradigm to study disease mechanisms, optimize patient care, and aid in the development of new therapies.
Journal ArticleDOI
AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the Electrocardiogram
TL;DR: The fourth in a series of 6 documents focused on providing current guidelines for the standardization and interpretation of the electrocardiogram (ECG) was published by the American Heart Association as discussed by the authors.
Journal ArticleDOI
AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the Electrocardiogram. Part III: Intraventricular Conduction Disturbances A Scientific Statement From the American Heart Association Electrocardiography and Arrhythmias Committee, Council on Clinical Cardiology; the American College of Cardiology Foundation; and the Heart Rhythm Society
TL;DR: The present article is the fourth in a series of 6 documents focused on providing current guidelines for the standardization and interpretation of the electrocardiogram (ECG) and explains why the ST and TP segments are normally nearly flat and at approximately the same level; that is, they are isoelectric.
Journal ArticleDOI
AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the Electrocardiogram. Part IV: The ST Segment, T and U Waves, and the QT Interval A Scientific Statement From the American Heart Association Electrocardiography and Arrhythmias Committee, Council on Clinical Cardiology; the American College of Cardiology; and the Heart Rhythm Society
TL;DR: The present article is the fourth in a series of 6 documents focused on providing current guidelines for the standardization and interpretation of the electrocardiogram (ECG) and discusses abnormalities in the ST segment, T wave, and duration of the QT interval reflect abnormalities in ventricular repolarization.
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Journal Article
An analysis of the time-relations of electrocardiograms
TL;DR: In this paper, a preliminary attempt was made to determine from blood pressure records the relative influence of the heart action and of vaso-canstriction, and it was suggested that it might be necessary to estimate the duration of ventricular systole for different heart rates.
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Die Systolendauer im Elektrokardiogramm bei normalen Menschen und bei Herzkranken
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An improved method for adjusting the QT interval for heart rate (the Framingham Heart Study)
TL;DR: To evaluate the heart rate QT association, the QT interval was measured on the initial baseline electrocardiogram of 5,018 subjects from the Framingham Heart Study and lower and upper limits of normal QT values in relation to RR were generated.
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Relation between QT and RR intervals is highly individual among healthy subjects: implications for heart rate correction of the QT interval
TL;DR: The QT/RR relation exhibits a very substantial intersubject variability in healthy volunteers, and the hypothesis underlying each prospective heart rate correction formula that a “physiological” QT-RR relation exists that can be mathematically described and applied to all people is incorrect.
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Rate-corrected QT interval: techniques and limitations.
TL;DR: Fridericia's cube-root formula is preferable to Bazett's square- root formula in correcting the QT interval for heart rate, and remains useful in assessing the effects of drugs on the duration of repolarization.