The evaluation of blood flow Xe133 in different degrees experimentally induced carotid stenosis

The present study was conducted in order to detect the possible relationship between the degree of carotid artery stenosis and the morphology, width of Xe133 curves and the absolute value of blood flow volume, obtained by the intra-carotid injection of Xe133 in 21 dogs (Groups A,B,C, n = 7 in each). In Group B the morphology of Xe133 curves revealed a double peak on the vertical part and the width a 57% decrease on the same part as compared to the control (Group A), while the per min blood flow value decreased by 47%. In Group C an elevation of the horizontal part was observed in all animals, the width of the vertical part could not be measured and the horizontal part showed a 10% increase as compared to the control Group A. Finally, the per minute blood flow value decreased by 75% compared to the controls.