Diagnostic performance of QT interval variables from 24-h electrocardiography in the long QT syndrome
نویسندگان
چکیده
منابع مشابه
Diagnostic 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 کاملQT interval variables from 24 hour electrocardiography and the two year risk of sudden death.
OBJECTIVE To study the effects of variability in the duration of the QT interval corrected for heart rate (QTc) on the occurrence of sudden death. DESIGN Nested case-referent study. SUBJECTS Cohort of 6693 consecutive patients who underwent 24 hour electrocardiography and were followed up for two years. Risk implications of QTc interval variables were studied in patients without evidence of...
متن کامل[The long QT interval syndrome].
The syndrome of long QT interval frequently follows to syncope or a sudden cardiac death on the basis of originated polymorphic ventricular tachycardia of the "torsade de pointes" type. The prolongation of the QT interval in the hereditary form is based on mutation of the genes responsible for the formation of sodium and potassium channels. The authors analyze the occurrence, clinical findings,...
متن کاملDiagnostic miscues in congenital long-QT syndrome.
BACKGROUND Long-QT syndrome (LQTS) is a potentially lethal cardiac channelopathy that can be mistaken for palpitations, neurocardiogenic syncope, and epilepsy. Because of increased physician and public awareness of warning signs suggestive of LQTS, there is the potential for LQTS to be overdiagnosed. We sought to determine the agreement between the dismissal diagnosis from an LQTS subspecialty ...
متن کاملNew quantitative methods for evaluation of dynamic changes in QT interval on 24 hour Holter ECG recordings: QT interval in idiopathic ventricular fibrillation and long QT syndrome.
OBJECTIVES To introduce a nomogram of the normal QT interval at various heart rates measured from 24 hour Holter ECG recordings in healthy subjects with respect to age and sex and to use the nomogram to characterise dynamic changes in QT interval in patients with idiopathic ventricular fibrillation (IVF) and the long QT syndrome (LQT). METHODS The study group consisted of 422 subjects: 249 he...
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ژورنال
عنوان ژورنال: European Heart Journal
سال: 1998
ISSN: 0195-668X
DOI: 10.1053/euhj.1997.0730