Histological studies of myocardium zones irradiated with Nd–YAG laser

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Abstract
Histological investigation of the dog's myocardium performed 7 and 25 days after irradiation with different doses of Nd‐YAG laser show that the damage zone has the shape of a hollow sphere with minor changes in cardiomyocytes in the central part of the sphere. The small blood vessels in the irradiated zone remained undamaged as well. A tentative explanation of the physical process that leads to this type of coagulation zone is given.

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