心电图QT间期代表了心室除极与复极的时程,由于实测的QT间期易受心率的影响,故临床常采用校正的QT间期(corrected QT interval,QTc)。当QTc延长时,心室复极储备降低,复极离散度增大,易引发尖端扭转型室性心动过速(torsade de pointes, TdP)。QT间期延长...
to compare corrected QT interval in normal Egyptian neonates to published values of other ethnic groups. This cross sectional study was conducted on neonates following up in Children's Hospital Ain Shams University, with post natal ages ranging from 8 to 28days (mean 13.91卤3.97days). They were...
U波明显时以T波于U波之间的切线作为终点,各导联连续测3个QT间期,取其平均值,即得到QT间期。根据Bazett′s公式心率校正的QT间期(corrected QT interval),QTc=QT/R-R′,计算出QTcmax,QTcmin,QTcd=QTcmax-QTcmin。6个月后复查上述指标。 1.4 统计学方法 所有数据用±s表示,采用t检验,以P<0.05表示差异有显著性...
尖端扭转型室性心动过速(torsade de pointes,TdP)是一种与QT间期或校正的QT间期(corrected QT interval,QTc)延长相关的多形性室性心动过速,可引起可逆性晕厥,也可恶化为心室颤动,导致心脏性猝死(sudden cardiac death,SCD)。一些已上市的药物,如特非那定、阿司咪唑、格雷沙星和西沙必利等,被发现有较高的诱发QT...
QTc is the corrected QT interval, but it is only valid within a limited range of heart rates (50–120 bpm) (Bazett, 1920; Napolitano et al., 2006). Like any other quantitative trait reflecting the influences from multiple sources, the length of QTc has a normal (Gaussian) distribution ...
On the 6th day, the QTc gradually returned to be within the normal range after discontinuation of moxifloxacin. The prolongation of QT interval in the patient was considered to be associated with moxifloxacin and amiodarone. 关键词 莫西沙星 / 胺碘酮 / 长QT综合征 Key words Moxifloxacin / ...
Although the importance of this error should not be minimized, the corrected QT interval remains useful in assessing the effects of drugs on the duration of repolarization. For this purpose, Fridericia's cube-root formula is preferable to Bazett's square-root formula. However, correcting the QT ...
心电图QT间期代表了心室除极与复极的时程,由于实测的QT间期易受心率的影响,故临床常采用校正的QT间期(corrected QT interval,QTc)。当QTc延长时,心室复极储备降低,复极离散度增大,易引发尖端扭转型室性心动过速(torsade de pointes, TdP)。QT间期延长的原因可分为遗传性及获得性:遗传性QT间期延长为先天性离子通道...
2) Corrected QT interval 校正QT间期 1. Conclusions Corrected QT interval is prolongation in patient. 目的:比较Shy-Drager综合征(SDS)患者的校正QT间期与正常人间的差异,并探讨其意义。 更多例句>> 3) Rate-corrected Q-T interval 校正QT间期时间...
The minimum QT interval averaged 261 ± 10 ms for HR> 120 and the maximum 389 ± 9 ms for HR ¤ 60; the corresponding mean value of QTc (i.e., QT corrected for HR) ranged from 388 ±8 for HR¤60 beats/min to 403 ±14 ms for HR> 120 beats/min. The results of the present...