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The Shortage of Short QT Intervals
Chest, 2007Syncope or sudden death has been associated with a short QT interval (QTc, < 300 ms), the so-called short QT syndrome. The current prevalence of this syndrome is unknown. The aim of this study was to evaluate the prevalence of short QT intervals (ie, QTc, < 300 ms) in a general hospital population.We retrospectively queried 479,120 consecutive ECGs ...
Michael G, Reinig, Toby R, Engel
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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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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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Syncope With Prolonged QT Interval
Archives of Pediatrics & Adolescent Medicine, 1976Four children with syncope had a prolonged QT interval on the electrocardiogram. Neurologic studies were negative. One patient had associated deaf mutism, one had a family history of sudden death and prolonged QT interval, and two had ventricular arrhythmias while being monitored in the hospital.
J P, Frank, D Z, Friedberg
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Measurement of the QT Interval
European Heart Journal, 1985R W, Campbell +4 more
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Bedside monitoring of the QT interval
American Journal of Critical Care, 1998Cardiac repolarization, represented on the ECG by the QT interval, is of particular clinical interest in critical care. Once it is measured and corrected for changes in heart rate, the QT interval is known as the QTc. Measurement of the QT interval is important because a prolonged QT interval is associated with ventricular tachycardia and sudden ...
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Measurement of QT interval and QT dispersion
The Lancet, 1997J A, Hill, P L, Friedman
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