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QT Interval and QT Dispersion in Eating Disorders
Psychotherapy and Psychosomatics, 2004<i>Background:</i> Eating disorders are thought to be risk factors for cardiac sudden death secondary to arrhythmia. Results in previous studies on QT interval and QT dispersion, markers of fatal arrhythmia, have been inconsistent. <i>Methods:</i> We prospectively examined 179 female eating disorder patients, being over 18 years
Yuzo Nagakawa +7 more
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THE QT INTERVAL AND CARDIAC ARRHYTHMIAS
Annual Review of Medicine, 1987The relation between the QT interval, ventricular arrhythmias, and dispersion of ventricular repolarization is reviewed. Conditions associated with prolonged QT interval in clinical practice are listed and discussed briefly. There is no conclusive evidence that prolonged QT is an independent prognostic marker in patients with coronary and other types ...
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, 2003 Although many factors influence the duration of ventricular repolarization and the detailed appearance of ECG (Table 1), regional differences in the configuration of action potentials across the myocardial wall are considered to be major determinants of the three-dimensional pattern of ECG waves and intervals.
Daniel Goodman +3 more
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Effect of respiration on the QT interval
Journal of Electrocardiology, 1994This clinical study was undertaken to investigate the effect of respiration on the QT interval. The QT interval is affected by a variety of factors, including steady changes in heart rate, instantaneous changes in heart rate as in atrial fibrillation, and changes in autonomic tone.
Sudha M. Pai, Ramdas G. Pai, John Rawles
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1989
The QT interval of the electrocardiogram (ECG) is measured from the onset of ventricular activity to the end of the T wave. Because the QT interval varies with heart rate in normal individuals a “corrected” QT interval is sometimes calculated to factor out heart rate-dependent effects to provide a measure that is independent of rate effects.
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The QT interval of the electrocardiogram (ECG) is measured from the onset of ventricular activity to the end of the T wave. Because the QT interval varies with heart rate in normal individuals a “corrected” QT interval is sometimes calculated to factor out heart rate-dependent effects to provide a measure that is independent of rate effects.
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Polypharmacy and the QT interval
British Journal of Cardiac Nursing, 2006A mini-systematic review was carried out to examine the evidence base of the effect of multiple drug administration (polypharmacy) on the QT interval in healthy humans. Prolongation of the electrocardiograph QT interval may lead to fatal cardiac arrhythmias and this may be induced by multiple drug administration.
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The QT interval historically treated
Pediatric Cardiology, 1983The growth of knowledge of the QT interval of the ECG is reviewed. 1980 was the centennial of the first careful measurements of Burdon-Sanderson and Page, and also the 60th anniversary of Bazett's contribution that established a predictable relation of the QT to heart rate in normal subjects.
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Prolonged QT-Interval Syndromes
JAMA: The Journal of the American Medical Association, 1986PROLONGATION of the QT interval, either on a congenital or an acquired basis, is associated with an increased likelihood of malignant ventricular arrhythmias. 1-3 Patients with QT prolongation frequently develop recurrent attacks of syncope or may present with sudden death.
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