Shortened QT refers to a QT interval on an electrocardiogram (ECG) that is less than 350 milliseconds, indicating a rapid repolarisation of the cardiac ventricles. Clinically, this condition can predispose patients to life-threatening arrhythmias, such as torsades de pointes, and may be associated with genetic syndromes like Jervell and Lange-Nielsen syndrome or electrolyte imbalances. Recognising shortened QT is crucial for preventing potential cardiac complications.
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