Stegnography

spirogramma
Spirogramma radial artery healthy person.

Stegnography - method graphic registration pulse fluctuations of the walls of arteries in the form of the curve (to be noticed) apparatus - sphygmograph. Most often written to be noticed sleepy and radial arteries, rarely - femoral arteries stop and others On normal spirogramma (Fig) there are steeply rising knee, sloping downward and to the last incremental (decrations) wave. If heart disease, peripheral artery disease and other diseases of the shape and amplitude of the pulse fluctuations on spirogramma change.