RESUMO
Superior vena cava obstruction is associated with multiple venous collaterals. There is an unusual pathway involving pulmonary venous collaterals in which systemic veins drain directly into the left heart, resulting in a right-to-left shunt. We report here a rare case of systemic to pulmonary venous shunt on both hemithoraces in superior vena cava obstruction associated with Budd-Chiari syndrome due to coagulopathy which was diagnosed by multidetector computed tomography angiography.
Assuntos
Angiografia/métodos , Síndrome de Budd-Chiari/diagnóstico por imagem , Veias Pulmonares/diagnóstico por imagem , Síndrome da Veia Cava Superior/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Adulto , Síndrome de Budd-Chiari/complicações , Circulação Colateral/fisiologia , Seguimentos , Humanos , Masculino , Veias Pulmonares/anormalidades , Intensificação de Imagem Radiográfica , Síndrome da Veia Cava Superior/complicaçõesRESUMO
The geometries, relative stabilities of some 4(7) and 5(6) substituted 2-hydroxybenzimidazole derivatives were calculated with full geometry optimization using AM1 and PM3 in aqueous phase. With the exception of molecules 4, 6 and 7 for all the 4(7) and 5(6) substituted 2-hydroxybenzimidazole derivatives the 3H and keto forms were found to be favored.