Electrocardiographic findings in single ventricle and related conditions

Abstract

A review is made of the electrocardiographic findings of 33 cases with derangement in the spatial relationship between the ventricular septum and the atrioventricular canal. To obtain an analysis with a maximal homogeneity, six groups are established according to the extent and direction of the above-mentioned derangement (Table I). Groups IA and IIA are equivalent to the most frequent designations of single left and right ventricle, respectively, or more exactly, to those of double-inlet left and right ventricle. Cases with disturbance in the position of the heart are considered separately to ascertain whether the outflow obstructions and the bulboventricular loop influence the electrocardiographic morphologies in any way. Electrocardiographic features of the other four groups (Table I) are analyzed to determine if the differences in the relationship between the atrioventricular canal and the interventricular septum are of small degree, and therefore if the hypoplastic cavity becomes larger.