Effects of laser radiation on parts of an atherosclerotically modified aorta wall

Detailed morphological investigations were made of craters, formed by laser radiation of various spectral compositions and of different intensities, on the surface of atherosclerotic plaque. It was found that, in the UV spectral range, there was an interval of intensities in which the rate of growth of the crater was maximal and a resection of tissue associated with the formation of shock waves was minimal. Moreover, it was established that, if some of the UV radiation was replaced with visible radiation retaining the same total intensity, the rate of growth of a crater was not affected but mechanical damage of tissue was considerably less.