Vascular pathology is defined by structural alterations in arterial walls driven by specific pathophysiological mechanisms: hyaline and hyperplastic arteriolosclerosis result from endothelial injury secondary to chronic or malignant hypertension, medial calcific sclerosis represents dystrophic calcium deposition unrelated to luminal flow compromise, and atherosclerosis functions as an inflammatory response to chronic endothelial damage leading to plaque formation. Rheumatic fever is characterized by molecular mimicry wherein antibodies against Group A Streptococcus M-protein cross-react with host tissues containing N-acetyl glucosamine, triggering Type II hypersensitivity reactions that cause pancarditis, including the pathognomonic Aschoff bodies in myocardial granulomas and fibrinous pericarditis.
Vascular pathology is defined by structural alterations in arterial walls driven by specific pathophysiological mechanisms: hyaline and hyperplastic arteriolosclerosis result from endothelial injury …