小结:QTc的具体含义为“QT间期的值标准化为 60 bpm 心率下的间期“,该概念有时被称为“基于心率校正的QT间期(QT interval corrected for heart rate)”。 什么是ΔQTc 如在“为什么要关注QT”章节所述,在进行CQT分析时我们实际更关注的是“QT间期的延长”,并不是QT绝对值得本身,因此显然我们需要一
QT corrected for heart rate (QTc) interval reflects ventricular repolarization, and its prolongation can lead to fatal ventricular arrhythmias. Studies on obese patients report a prolonged QTc interval as well as an increased rate of sudden cardiac death when compared with lean individuals. Bariatric ...
a prolonged QT interval (corrected for heart rate) carries a twofold increase in the risk of coronary events and cardiovascular death, after adjusting for the effects of age, sex, diabetes mellitus, serum cholesterol level, serum creatinine level, smoking, left ventricular hypertrophy (LVH) and 24...
Marked prolongation of QT interval in a 15-year-old male adolescent with long QT syndrome (LQTS) (R-R = 1.00 s, QT interval = 0.56 s, QT interval corrected for heart rate [QTc] = 0.56 s). Abnormal morphology of repolarization can be observed in almost every lead (ie, peaked T waves...
Hashimoto Y, Tanaka M, Senmaru T et al ; Heart rate-corrected QT interval is a novel risk marker for the progression of albuminuria in people with Type 2 diabetes. Diabet Med. 2015 Sep;32(9): 1221-6. doi: 10.1111/dme.12728.
Thelong QT syndromes(LQTS) are primary disorders ofcardiac repolarization(Schwartz et al., 2000a) in which prolongation of theQT interval correctedfor heart rate (QTc) is seen on the surface electrocardiogram (ECG) along with abnormalities of T-wave morphology andsinus bradycardia(Figure 29.1). ...
Because of this relationship, direct effects of compounds on the QT interval should be distinguished from indirect effects on HR. The direct effect can be assessed on the basis of QT values corrected for HR (QTc). Various equations have been proposed to describe the relationship between HR (or...
Rate-corrected QT interval: techniques and limitations. Am J Cardiol.1993;72:17B-22B.Google Scholar 16. Hnatkova K, Malik M. "Optimum" formulae for heart rate correction of the QT interval. Pacing Clin Electrophysiol.1999;22:1683-1687.Google Scholar 17. Aytemir K, Maarouf N, ...
Rate Variability in Patients with Uncomplicated Essential Hypertension Simona MAULE1), Franco RABBIA1), Valentina PERNI1), Francesco TOSELLO1), Daniela BISBOCCI1), Paolo MULATERO1), and Franco VEGLIO1) A prolonged QT interval is a risk factor for ischemic heart disease in hypertensive subjects. ...
结果(1)两组比较:VVS-CI组较对照组心率降低( P<0.05),最大QT间期(maximum QT interval,QTmax)、最小QT间期(minimum QT interval,QTmin)、QTd、校正最大QT间期(corrected maximum QT interval,QTcmax)、校正QT间期离散度(corrected QT interval dispersion,QTcd)延长( P<0.05)。随访84(45,127)d,无反应组较...