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- W1977093359 abstract "The effects of long-term angiotensin-converting enzyme (ACE) inhibitor treatment with perindopril 2 mg/kg/day, by gavage, for 3 months on the mechanical function and structure of large arteries were studied in adult spontaneously hypertensive rats with established hypertension. Hemodynamic parameters, including instantaneous aortic blood flow and pressure, were recorded under anesthesia at the end of the treatment period. Systemic arterial compliance was calculated from aortic pressure and flow recordings; passive mechanical properties of the in situ localized carotid artery were measured. Histologic and morphologic parameters of the aortic media, including cross-sectional area and thickness, size, and density of smooth muscle nuclei and of elastin and collagen fibers, were measured using an automated image analysis system. ACE inhibitor treatment significantly decreased mean arterial pressure (-27%, p < 0.001) and total peripheral resistance (-30%, p < 0.05) while cardiac output was increased (29%, p < 0.05). Systemic arterial compliance and carotid compliance were both increased by treatment (63%, p < 0.05, and 83%, p < 0.05, respectively). Morphometric assessment of vascular structure showed that ACE inhibitor treatment significantly decreased medial cross-sectional area (-36%, p < 0.001) and thickness (-16%, p < 0.001) by affecting smooth muscle cell hypertrophy (nucleus size decreased by 26%, p < 0.05) without changes in smooth cell number. Collagen density was decreased by treatment (-42%, p < 0.05), whereas elastin density was not affected by treatment.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1977093359 date "1993-06-01" @default.
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- W1977093359 title "Long-term effects of angiotensin-converting enzyme inhibition on the arterial wall of adult spontaneously hypertensive rats" @default.
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- W1977093359 doi "https://doi.org/10.1016/0002-9149(93)90946-a" @default.
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