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...
QT interval: how to measure it and what is "normal." J Cardiovasc Electrophysiol. 2006 Mar; 17:333- 6.Goldenberg I, Moss AJ, Zareba W (2006) QT interval: how to measure it and what is ``normal''. J Cardiovasc Electrophysiol 17 (3): 333-336....
How to measure the QT interval--what is normal? 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 ...
A, Normal sinus rhythm; the Bazett formula is used to correct the QT interval for the heart rate. B, Atrial fibrillation; QT interval is calculated by taking the average of QT intervals with shortest and longest preceding R-R intervals. Pharmacokinetic Interactions With Selected QT-Prolonging ...
摘要: Discusses a study which described QTc prolongation and a larger QT dispersion in a cohort of children and adolescents with type 1 diabetes. Overview of the research design and methods; Discussion on the research findings; Interpretation of continuous glucose manitoring system readings....
Cardiac arrest due to torsades de pointes (TdP) is an uncommon but potentially catastrophic event associated with QT interval-prolonging drugs [ 1 ]. Numerous medications that may cause TdP are available for use in clinical practice, and include drugs for management of cardiovascular diseases, prima...
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Heart palpitations occur when methadone is combined with haloperidol, as this combination results in a prolonged QT interval over 500ms. 55μM of fluoxetine reduces the enzyme breakdown of methadone by 50%, resulting in higher levels of circulating methadone and respiratory depression [15]. ...
Eliminating client polling reduces the workload on the IMAP server and enhances the server's performance. Client polling is most wasteful when a user receives few or no messages; the client continues to poll at the configured interval, typically every 5 or 10 minutes. ...
Magnesium is effective even in patients with normal magnesium levels. Can stress cause prolonged QT interval? Mental stress may induce QT-interval prolongation and T-wave notching. Can amiodarone cause torsades? 4 Amiodarone is presumed to have a low incidence of drug-induced torsades de pointes (...