An Experimental Study of the Production and Time Course of Poststenotic Dilatation in the Femoral and Carotid Arteries of Adult Dogs.

NATURAL OCCURRENCE Although there is little data on the exact incidence of poststenotic dilatation, it is common with some types of constriction such as pulmonary and aortic valve stenoses' but rare with others such as infundibular pulmonary stenosis" or supravalvular aortic stenosis. It occurs with both congenital" and acquired' 6 aortic stenosis. Skandalakis et al., in a survey of the literature from 1928 to 1958, found that 51.6% of the 106 aneurysms reported with coarctation of the aorta were distal to the stenosed segment. Kieffer et al. found 19 cases of mycotic aneurysm distal to a coarctation reported up to 1961 (9 of them ruptured). Zaroff et al. observed poststenotic dilatation distal to coarctation of the abdominal aorta, and Arvidsson et al. and Orell et al. described it beyond coarctation of the peripheral pulmonary arteries. Poststenotic dilatation occurs with renal arterial stenoses, especially those due to arterioselerotic plaques or medial fibromuscular hyperplasia, and may help to detect the