RESUMO
A unique combination of pulmonary agenesis and anatomic left aortic arch with aberrant right subclavian artery was identified in two patients. Because of the right pulmonary agenesis, there is rotation of mediastinal contents, especially the aortic arch, into the right chest, converting an incomplete vascular ring to a near-complete vascular ring. The anterior portion of the ring is formed by the ascending aorta and aortic arch, whereas the posterior portion is formed by the aberrant right subclavian artery. Subclavian artery reimplantation and aortopexy effectively relieve the anterior and posterior tracheoesophageal compressive forces.
Assuntos
Pulmão/anormalidades , Artéria Subclávia/anormalidades , Aorta Torácica/anormalidades , Pré-Escolar , Feminino , Humanos , Imageamento Tridimensional , Recém-Nascido , Imageamento por Ressonância Magnética , Masculino , Reimplante , Artéria Subclávia/cirurgiaRESUMO
UNLABELLED: The authors evaluated the ability of rHuEPO (recombinant human erythropoietin) in performing a vasoactive calcium-mediated action. Forty healthy volunteers were evaluated for the muscle blood flow at rest (RBF) and after reactive hyperemia by Xenon 133 clearance. Pre-treatments with several calcium antagonists were used. RESULTS: The i.v. infusion of rHuEPO brought about a reduction of the RBF and MBF (maximal blood flow). This reduction was maintained with nifedipine or verapamil. Gallopamil and ketanserine prevented the reduction of blood flow induced by rHuEPO. CONCLUSIONS. The rHuEPO has a vasoconstrictive action in vivo since gallopamil and ketanserine, drugs able to prevent intracellular mobilisation of the Ca++, can block the rHuEPO induced vasoconstriction. The action exerted by rHuEPO could be due not an increased flow of the Ca++ from the extracellular department but to a mobilisation from Ca++ deposits.
Assuntos
Circulação Sanguínea/efeitos dos fármacos , Cálcio/metabolismo , Eritropoetina/farmacologia , Adulto , Galopamil/farmacologia , Humanos , Ketanserina/farmacologia , Masculino , Nifedipino/farmacologia , Proteínas Recombinantes/farmacologia , Vasoconstritores/farmacologia , Verapamil/farmacologiaRESUMO
Plasmatic amylase increases quite often in uremia. Hyperparathyroidism is also present in uremic patients and it is thought to be the main factor of an increased of amylase; its effect is mediated by an increase of cytosolic calcium. The authors measured the plasmatic level of amylase, lipase, calcium phosphates and parathormone before and after administration of Ca-antagonists (Verapamil and Diltiazem). The results did not shown any correlation. Hyperparathyroidism increased the pancreatic secretion but don't influences the amount of enzymes.