Q-T dispersion


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia.

Q-T dispersion

The difference between the longest and the shortest Q-T interval recorded by electrocardiography. High levels of Q-T dispersion (e.g., greater than 100 msec) may be a risk factor for life-threatening ventricular arrhythmias.
See also: dispersion