Real-World Relevance of Manual Electrocardiography QT Interval Measurement
نویسندگان
چکیده
منابع مشابه
Measurement of the QT interval.
Ventricular repolarization is reflected by the T-wave of the surface electrocardiogram, the QT interval being the time taken for ventricular recovery. QT measurement has assumed clinical importance as prolongation is associated with a variety of conditions includingthe Romano-Ward' and JervellLange-Neilson syndromes, drug toxirity' and an adverse prognosis following acute myocardial infarction....
متن کاملIssues in QT interval measurement
The QT interval, apart from clinical implications is crucial for safety assessment of new drugs under development. A QTc prolongation of even 10 msec in a study group is a warning signal for a new drug. There are various issues involved in the measurement of the QT interval especially regarding the ending of the T wave and different morphological pattern of T-U complex. The other issue is signi...
متن کاملErrors in manual measurement of QT intervals.
OBJECTIVE To quantify the errors associated with manual measurement of QT intervals and to determine the source of the errors. DESIGN A randomised study of QT measurement by four cardiologists of electrocardiograms plotted on paper in presentations with different noise levels, paper speeds, amplifier gains, and with and without a second QRST complex to indicate the RR interval. SUBJECTS Fou...
متن کاملDiagnostic performance of QT interval variables from 24-h electrocardiography in the long QT syndrome.
AIMS The long QT syndrome is mainly defined by QT interval prolongation (QTc > 0.44s). However, data obtained in genotyped patients showed that resting QTc measurement alone may be inaccurate for ascertaining the phenotype. The aim of this study was to evaluate the diagnostic performance of QT interval rate-dependence in untreated chromosome 11-linked patients. METHODS The study population co...
متن کاملThe Measurement of the QT Interval
The evaluation of every electrocardiogram should also include an effort to interpret the QT interval to assess the risk of malignant arrhythmias and sudden death associated with an aberrant QT interval. The QT interval is measured from the beginning of the QRS complex to the end of the T-wave, and should be corrected for heart rate to enable comparison with reference values. However, the correc...
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ژورنال
عنوان ژورنال: Journal of Patient-Centered Research and Reviews
سال: 2015
ISSN: 2330-0698
DOI: 10.17294/2330-0698.1241