QT interval: how to measure it and what is "normal." J Cardiovasc Electrophysiol 2006;17:333- 6.I Goldenberg,AJ Moss,W Zareba.QT interval: how to measure it and what is “normal”. Journal of Cardiovascular Electrophysiology . 2006
The QT interval extends from the beginning of the QRS complex to the end of the T wave. Since the report of Jervell and Lange-Nielsen in 1957, it has been difficult to determine whether to measure a QT or a QU interval. U waves are more prominent in the left chest leads and less pr...
ContextOf the several factors implicated in causing QT interval prolongation and torsades de pointes, errors in the use of medications that may
interval间期normalmeasurerepolarizationwave 333TECHNIQUESANDTECHNOLOGYEditor:HughCalkins,M.D.QTInterval:HowtoMeasureItandWhatIs“Normal”ILANGOLDENBERG,M.D.,ARTHURJ.MOSS,M.D.,andWOJCIECHZAREBA,M.D.,PH.D.FromtheCardiologyDivision,DepartmentofMedicine,UniversityofRochesterMedicalCenter,Rochester,NewYork,USAAbnor...
On the basis of the original plan of “four vertical and four horizontal” main structure, the existing railways are fully utilized to form a high-speed railway network with “eight vertical and eight __...
In normal sinus rhythm, what does the P-wave, the PR interval, QRS complex, and QT interval reflect?ECG:An ECG, or electrocardiogram, is an electrical readout of the heart which measures the electrical output of all heart chambers during cardiac cycles. Thi...
Patient-independent human induced pluripotent stem cell model: A new tool for rapid determination of genetic variant pathogenicity in long QT syndrome. Heart Rhythm. 2019, 16, 1686–1695. [Google Scholar] [CrossRef] [PubMed] Doss, M.X.; Di Diego, J.M.; Goodrow, R.J.; Wu, Y.; ...
Dispersion of QT interval in patients with and without susceptibility to ventricular tachyarrhythmias after previous myocardial infarction. J Am Coll Cardiol 1995; 26: 174-179. Zabel M, Klingenheben T, Franz MR, Hohnloser SH. Assessment of QT dispersion for prediction of mortality or arrhythmic ...
Patients with mild renal/hepatic/cardiac dysfunction may also be excluded because of arbitrary “cutoffs” rather than clinical relevance (usually >60 mL/min for GFR, >50% ejection fraction or <450 milliseconds for corrected QT interval for cardiac status, <2–3 times upper limit of normal (...
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