The Effect of Psychotropic Medications and Their Combinations on the QTc Interval Among Jordanian Outpatients: A Cross-Sectional Study.

Objective: To investigate the effect of psychotropic drugs and their combinations on the QTc interval as well as the prevalence of long QTc (LQTc) among ambulatory patients with psychiatric illness in Jordan.

Methods: A cross-sectional study that included patients treated in an outpatient psychiatric clinic was conducted. The QTc duration was calculated using a combined QT correction (Bazett's formula for heart rate 60-100 and the Framingham formula for extremes of HR).