Tricuspid atresia. Clinical course in 62 cases (1967--1974).

Abstract

Sixty-two patients with tricuspid atresia admitted for cardiac catheterisation between 1967 and 1974 have been classified according to the anatomical and radiological findings into those with normally related great arteries (type I: 39 cases) and those with transposition of the great arteries (type II: 23 cases). These types were further subdivided into group A (reduced lung vascularity), group B (normal or increased vascularity), and group C (increased vascularity initially, becoming reduced). Electrocardiograms showed a superior and leftward axis in 61b5 per cent of patients with type I and 22-7 per cent ofthose with type II tricuspid atresia. Correlations between P wave amplitude (> 0.25 mV) and the atrial pressures showed a better correlation with a wave gradient rather than with mean inter- atrial gradient.