Response of the QT interval to mental and physical stress in types LQT1 and LQT2 of the long QT syndrome

摘要

Objective-To study and compare the effects of mental and physical stress on long QT syndrome (LQTS) patients. Design-Case-control study. Main outcome measures-QT intervals were measured from lead V3. Serum potassium and Plasma catecholamine concentrations were also monitored. Ptients-16 patients with type LQTS (LQT1), 14 with type 2 LQTS (lqt2), both groups Asymptomatic, and 14 healthy control subjects. Interventions-Three types of mental stress tests and a submaximal exercise stress test.