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Medical Definition of Hypertensive arteriosclerosis
1. Progressive increase in muscle and elastic tissue of arterial walls, resulting from hypertension; in longstanding hypertension, elastic tissue forms numerous concentric layers in the intima and there is replacement of muscle by collagen fibres and hyaline thickening of the intima of arterioles; such changes can develop with increasing age in the absence of hypertension and may then be referred to as senile arteriosclerosis. (05 Mar 2000)