01721nas a2200265   4500000000100000008004100001260001300042653001000055653000900065653001900074653003000093653001100123653001100134653000900145653001600154653002800170100002000198700001800218700002300236245006400259300001000323490000700333520110100340022001401441       1990                            d  c1990 Sep10aAdult10aAged10aChagas disease10aEvoked Potentials, Visual10aFemale10aHumans10aMale10aMiddle Aged10aNervous System Diseases1 aPelli-Noble R F1 aIguzquiza O D1 aGraiff de Riarte E00a[Visual evoked potentials in chronic Chagas-Mazza disease].  a315-90 v483 a<p>Both modalities of visual evoked potentials (VEP), flash (F) and pattern (P), were carried out in 17 patients with chronic Chagas disease. The patients included, between 21 and 65 years old, presented an evolution period of more than 7 years and a minimum of two positive serologies. Those patients with diabetes, alcoholism, leprosy, syphilis and degenerative diseases of the central nervous system, so as intoxications of different etiologies, and visual disorders detected through ophthalmological examination were discarded. Everyone was studied by means of routine clinical and complementary analysis, electrocardiogram, ophthalmological examination and specific analyses for the disease, like Machado-Guerreiro reaction, immunofluorescence and hemoagglutination tests. The VEP results showed alterations in the morphology of the record and a decrease of the potential amplitude in 35% of these patients. The electroneurophysiological alterations would suggest a correlation with anatomopathologic findings, that show loss of neuronal groups in autopsies of chronic Chagasic patients.</p>  a0004-282X