More light on QT interval measurement.
Toivonen
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D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D016757:Death, Sudden, Cardiac / Q000517:prevention & control*; D004562:Electrocardiography / Q000379:methods*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors