Ten cases are presented of children having patent ductus arteriosus with reversal of shunt. Cyanosis, often greater in the toes, was present in all. Exertional dyspnea developed early. Murmurs were of no diagnostic value, but an accentuated pulmonic second sound was uniformly present. Right ventricular preponderance was found in all cases on the electrocardiogram. Cardiac size varied on roentgenography, but there was usually prominence of the pulmonary artery segment. Six cases showed evidence of bi-directional shunts, one showed only a reversed shunt, while data were insufficient to determine this point in the remaining three. Three patients had surgery, one with a successful outcome. The latter was a 1-year-old infant in whom lung biopsy at surgery revealed only minimal pulmonary arterial changes.
Forty-five cases are reviewed from the literature. The majority of these occurred in adults. Twenty-two have been subjected to surgery, four with good results, three of the latter being children.
The differential diagnosis is briefly discussed. The safest and simplest diagnostic test to perform is the determination of oxygen saturation of samples of blood obtained simultaneously from the right brachial and femoral arteries. Angiocardiography and cardiac catheterization also provided helpful information. The diagnosis will not be made unless the examiner keeps the entity in mind. The entity can no longer be considered rare.
Surgical treatment of the condition has been very disappointing, especially in the adult. There is reason to believe that surgical intervention very early in life will yield a higher salvage rate.
Diagnostic value of chest CT scanning for determination of Covid-19 severity in individual lung lobes
