Biomedical subjects
Publications and source records attributed to J Verdejo.
Two cases of double-chambered right ventricle without ventricular septal defect are presented. Both were diagnosed with the hemodynamic study and underwent successful surgical repair. We discuss the probable embryologic development and the diagnostic procedures of this malformation.
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Hemodynamic studies at rest, at exercise and during oxygen breathing (FiO2 99.6%) were carried out in 12 patients with severe chronic obstructive lung disease and cor pulmonale without congestion (NOCA). All lived in Mexico city (2,240 meters). Our data confirm the concept of a spectrum of ventricular behaviour, from normal to the one when right ventricular pressure abnormalities exist and blood flow is restricted. The right ventricular stroke work index was considerably higher due mainly to the increase in pressure work. Grossly right ventricular performance at altitude is not different from the described at sea level. When stroke index (SI) is related to the right ventricular end diastolic pressure (RVEDP), patients with NOC at sea level show depressed right ventricular function. This relation was different for NOC-A and it could be related indirectly to higher altitude. On the basis of the relation found for SI-RVEDP at our altitude we could not conclude that NOC-A show depressed right ventricular function.
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Ischemic stroke during or following cardiac catheterization may be secondary to diverses mechanisms. Formation and detachment of clots in the catheter wall and embolization of a breaked atheromatous lesion are most frequently. The visualization of clots free in the interior of bypass aortocoronary graft is extremely rare and poorly documented. With angiographic evidence we present a case of cerebral acute ischemia secondary to migration of an embolus from a saphenous vein aortocoronary bypass graft. This case shows a different mechanism of cerebral ischemia.