The QT interval is the time from the beginning of the QRS complex, representing ventricular depolarization, to the end of the T wave, resulting from ventricular repolarization. The normal QT ...

Whereas someone exhibiting marked prolongation of the QT interval with QTc exceeding 500 ms who was just externally defibrillated from torsades de pointes while swimming poses negligible diagnostic ...

Purpose: The association of antipsychotic and antidepressant drugs with Q-T interval prolongation is reviewed. Summary: Prolongation of the Q-T interval can be of particular concern to ...

Children’s Healthcare of Atlanta’s heart clinics treat about 200 children a year. This includes Audrey Koch, a Roswell teen with a heart condition called Long QT syndrome.

Patients with LQTS have impaired adaptation of the QT interval in response to changes in heart rate. A study by Dr Sami Viskin and colleagues has now shown that this maladaptation is exaggerated ...

Possible neurotoxicity with lithium: monitor, discontinue if occurs. Caution with drugs that prolong the QT interval (eg, Class 1A [eg, procainamide, quinidine, disopyramide] or Class 3 ...

Possible neurotoxicity with lithium: monitor, discontinue if occurs. Caution with drugs that prolong the QT interval (eg, ketoconazole, paroxetine). May be potentiated by CYP3A4 inhibitors ...