Hypothyroidism has various cardiovascular manifestation and exhibits electrocardiographic change. The QT dispersion on surface ECG reflects regional variations in myocardial repolarization. The effect of L-thyroxine treatment on ECG parameters, such as QT dispersion, in patients with primary hypothyroidism were investigated. This study involved 18 patients (3 men, 15 women, ages: 48+/-18 yr) wi...

mitral valve prolapse (mvp) is a relatively frequent valvular abnormality. in both children and adults with mvp, an increased incidence of ventricular arrhythmias has been reported. qt dispersion, defined as the difference in duration between the longest qt interval and the shortest one, for a given set of electrocardiographic leads has been proposed as a sign of regional difference in cardiac ...