The normal values for the QT interval depend on the heart rate. As the heart rate increases (RR interval shortens), the QT interval normally shortens; as the heart rate decreases (RR interval lengthens), the QT interval lengthens. The RR interval, as described later, is the interval between...
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...
4、en and 56 normal women.Results:QT interval became shorter as the heart rate increased.The two variables manifested a negative linear relation.For man,the values were -1.38±0.30 for the slope of regression equation;462±37 ms for the intercept;and -0.96±0.03 for the correlation coeffici ...
【Key words】electrocardiographyreference valuesQT interval dispersion体表心电各导联间QT间期的差异反映了心室肌复极不一致性和电不稳定性的区域性变化程度,这种差异命名为QT间期离散度(QT interval dispersion, QTd)1。近年研究显示QTd增加可作为估测先天性QT间期延长综合征、充血性心力衰竭、心肌梗塞并发室性心律失常...
Goldenberg I, Moss AJ, Zareba W (2006) QT interval: how to measure it and what is ``normal''. J Cardiovasc Electrophysiol 17 (3): 333-336.Goldenberg I, Moss AJ, Zareba W. QT interval: how to measure it and what is "normal". J Cardiovasc Electrophysiol 2006;17:333-6....
The objective of this study was to establish normal values for the QT interval in newborns of different ethnic origin. Between 2005 and 2006, ECGs were obtained during the first 48 h of life from 1305 full-term newborns at the Hospital del Mar in Barcelona, Spain. The mean corrected QT ...
interval for the prediction of OCAD, a ROC curve analysis was used to estimate sensitivity and specificity. The QTc interval cutoff values were determined based on maximum Youden index (J) in men and women. Multivariate logistic regression analysis was used to investigate the impact of QT ...
On a normal ECG, you’ve got the P, Q, R, S, and T waves. The QT interval spans from the start of the Q to the end of the T wave. Long QT syndrome, or LQTS, is when somebody’s QT interval is longer than normal, which should typically be less than half of a cardiac cycle...
An alarm is responsive to updated QT interval values and issues an alarm whenever a selected QT value exceeds an alarm limit. 警报器响应于更新的QT间期值,当所选定的QT值超过警报限度时就发出警报。 ip.com 8. PR interval and QT interval were slightly longer in the test group, but no statistica...
Post-hoc analysis revealed the prolongation of RR intervals in AP-NO in comparison to those of CON during week 28 (Po0.001), which subsequently returned to normal values. In AP-PO, the average RR interval was Hypertension Research QT variability and rate adaptation in pregnancy M Baumert et ...