RESUMEN
We report 5 patients, who had no cardiac abnormalities at their initial evaluation but progressed to dilated cardiomyopathy (DCM) during a mean follow-up period of 8.2 years. Their echocardiograms revealed increases in left ventricular (LV) end-diastolic dimensions, deterioration of LV contractions, and reduction in the LV wall thickness. Electrocardiographic changes were developed of rhythm disturbances, intensified ST-segment and T-wave changes, and the prolonged QRS durations. These findings, especially those of electrocardiography, seemed to be important for an early detection and characterization of DCM.
Asunto(s)
Cardiomiopatía Dilatada/diagnóstico , Adolescente , Adulto , Cardiomiopatía Dilatada/fisiopatología , Ecocardiografía , Electrocardiografía , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana EdadRESUMEN
Glass powders (350 mesh) of the composition MgO, 4.6; CaO, 44.9; SiO, 34.2; PO, 16.3; CaF, 0.5 in weight ratio were compacted, heated to 1050 degrees C at a rate of 5 degrees C/min and kept at 1050 degrees C for 2 h. The resultant glass-ceramic having oxyapatite, fluoroapatite, and wollastonite crystals showed high bending and compressive strengths of 157 and 1060 MPa, respectively. The biocompatibility and bonding ability of this new glass-ceramic to the bone tissue was evaluated using rabbit tibial bones, and the failure load to break the bonding of several ceramics (the new glass-ceramic, dense hydroxyapatite, 45S5 Bioglass, alumina-ceramic) to bone tissues was measured. The new glass-ceramic showed tight bonding to bone comparable with dense hydroxyapatite, and in 25 weeks its load was 70% of that of bone tissue.
Asunto(s)
Órganos Artificiales , Huesos/fisiología , Cerámica , Vidrio , Prótesis e Implantes , Animales , Huesos/ultraestructura , Durapatita , Hidroxiapatitas , Microscopía Electrónica de Rastreo , Fotograbar , Conejos , Tibia/fisiologíaRESUMEN
A 15-month-old boy with posterior mediastinal endodermal sinus tumor is reported. The patient was admitted with recurrent hemothorax, and his serum alpha-fetoprotein level was 29,520 ng/ml. After removal of the posterior mediastinal tumor, VAC therapy (vincristine, actinomycin D, cyclophosphamide) was started. The chemotherapy was continued 18 months. The patient continues to do well with no sign of tumor and a normal alpha-fetoprotein level 53 months after the operation and 35 months after the completion of therapy. He is the youngest patient documented in the literature and successfully treated for mediastinal endodermal sinus tumor.