A 49-year-old woman had a long history of chronic glomerulonephritis, of which she dicd. Autopsy shows that her kidneys are 7x3x25 cm in size, have weight of 65.0 g. are dense and lincly granular. Fibrinous inlammation of serous and mucous tunics, dystrophic degeneration of parenchymal organs, and cerebral cdema were detected as well. What complication caused such changes in the serous tunics and internal organs?