The invention relates to an angioplasty device for treating stenoses or occlusions that facilitates the diagnosis and visualisation of the stenosis and the treatment control having a duct dedicated to the injection of the contrast product. The compositions comprise electrocatalytic intercalators that bind to double-stranded nucleic acid and oxidize nucleic acid. Combustible fuel is mixed with the air. If there is a hit, a first word line is activated based on a row address determined from the first address, and the MRAM bit cells at the first address are read using the settled reference voltage.