Usefulness of Vectorcardiography for Assessment of Severity of Right Ventricular Overloading in Congenital Heart Disease : 1.Pulmonary Stenosis with Intact Ventricular Septum

Abstract

Frank lead vectorcardiograms of 17 catheterized patients of pulmonary stenosis with intact ventricular septum were reviewed in order to determine the usefulness of vectorcardiography as an indicator of the hemodynamic status. A close correlation was observed between the vectorcardiographic change and right ventricular pressure. Among the measurable parameters, the half-area QRS angle in the frontal plane, ratio of right/leftward QRS forces and maximum T angle were thought to be of great value for assessment of the severity of pulmonary stenosis.