Percutaneous endovascular treatment of an iatrogenic superior cava vein syndrome during the immediate post-operative period after mitral-aortic valve replacement. / Tratamiento endovascular percutáneo de un síndrome de vena cava superior en el postoperatorio inmediato de recambio valvular mitroaórtico.

Superior vena cava syndrome (SVCS) results from superior vena cava obstruction, causing a decrease in venous return from the head, neck, and upper extremities. Although the most frequent cause is still malignant tumour processes, in recent years an increase has been observed in non-tumour causes, such as thrombosis of intravascular devices or iatrogenic causes during cardiac surgery. A case is presented of SVCS after cardiac surgery treated satisfactorily by an endovascular technique and systemic anticoagulation.

Geochemical behavior of heavy metals in a Zn-Pb-Cu mining area in the State of Mexico (central Mexico).

The geochemical behavior of zinc, lead and copper from sulfidic tailings in a mine site with potential to generate acidic drainage (pyrite (55%) and sphalerite (2%)) is reported in this paper. The mining area is divided in two zones, considering the topographic location of sampling points with respect to the tailings pile: (a) outer zone, out of the probable influence of acid mine drainage (AMD) pollution, and (b) inner zone, probably influenced by AMD pollution. Maximum total ions concentrations (mg/L) measured in superficial waters found were, in the outer zone: As (0.2), Cd (0.9), Fe (19), Mn (39), Pb (5.02), SO4(2-) (4650), Zn (107.67), and in the inner zone are As (0.1), Cd (0.2), Fe (88), Mn (13), Pb (6), SO4(2-) (4,880), Zn (46). The presence of these ions that exceeding the permissible maximum limits for human consume, could be associated to tailings mineralogy and acid leachates generated in tailings pile.