Quantitative Study of Intimal Longitudinal Smooth Muscle in Human Small Mesenteric Arteries

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Abstract
The present paper examines the results of quantitative assessment of intimal longitudinal smooth muscle (ILSM) in small arteries from normal mesentery in man. 212 vessels from 24 patients who underwent colectomy for colorectal carcinoma were studied. The mean amount of ILSM in these vessels was found to be 1.42% (range 0.00–8.90%) of external vessel diameter. A statistically significant (p = 0.018) positive correlation was demonstrated between the mean amount of ILSM in vessels from any individual patient and the level of diastolic blood pressure. It is concluded that increased intravascular tension is one factor which influences the development of ILSM in human small mesenteric arteries.