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Distribution of nitric oxide in cardiovascular system

We report here the in vitro measurements of nitric oxide in the cardiovascular system using a porphyrinic sensor specific for NO. Nitric oxide concentrations were measured directly in different parts of the heart and also in different arteries and veins, ranging from 100 /um to 5 mm in diameter. Highest NO * concentrations were found in the heart and particularly in the areas of aortic and pulmona…