5. Heath D, Edwards JE: The pathology of hypertensive pulmonary vascular disease: a description of six grades of structural changes in the -pulmonary arteries with special reference to congenital cardiac septal defects. Circulation 18: 533, 1958 6. Mair DD, Ritter DG, Davis GD, Wallace RB, Danielson GK, McGoon DC: Selection of patients with truncus arteriosus for surgical correction: anatomic a...

Heart rate and blood pressure were measured in lightly anesthetized developing Xenopus laevis from hatching (body mass approximately 3 mg) to the end of metamorphosis (< or = 1 g). Blood pressures in the conus arteriosus, truncus arteriosus, and ventricle were measured by a servo-null micropressure system. Heart rate was determined from blood pressure recordings, and cardiac cycles were videota...

Twenty three morphological specimens of truncus arteriosus were examined for evidence of stenosis of the semilunar valve. One third showed good evidence of stenosis as judged by careful measurement of the valve orifice, the valve ring, and the maximum diameter of the truncus. Correlation with measured pressure gradients was poor, but angiography and cross sectional echocardiography were better ...

Specimens of heart from 30 subjects with persistent truncus arteriosus were studied for the nature and sites of coronary arterial origin. These factors were related to the sinuses of the truncus valve. Bicuspid truncal valve was observed in six cases (20%) and tricuspid in 21 cases (70%). Single coronary artery was observed in four cases (three with tricuspid and one with quadricuspid truncal v...

SUMMARY During cardiac catheterization in nine patients with ventricular septal defect and seven patients with truncus arteriosus, all with severe pulmonary vascular obstructive disease, hemodynamics were compared while they were breathing first room air and then 100% oxygen. Patients with higher pulmonary vascular resistance had higher systemic vascular resistances. With 100% oxygen, pulmonary...

A series of 25 cases of truncus arteriosus communis examined post mortem was studied retrospectively. Fifteen of them had had angiographic studies, enabling anatomo-radiographic correlative analysis to be made. All cases had situs solitus of the atria and concordant connections between atria and ventricles. The three main components of the malformation, present in all 25 cases, were: (a) ventri...

A series of 25 cases of truncus arteriosus communis examined post mortem was studied retrospectively. Fifteen of them had had angiographic studies, enabling anatomo-radiographic correlative analysis to be made. All cases had situs solitus of the atria and concordant connections between atria and ventricles. The three main components of the malformation, present in all 25 cases, were: (a) ventri...