long QT syndromes

long QT syndromes

a group of congenital and acquired diseases in which the electrocardiographic QT interval is longer than established measurements for age and sex; the presence of long QT intervals presages arrhythmias and sudden death.
See also: QT interval.

long QT syn·dromes

(lawng sin'drōmz) Any of several congenital and acquired diseases in which the electrocardiographic QT interval is longer than established measurements for age and sex; the presence of long QT intervals presages arrhythmias and sudden death.
See also: QT interval