CO 2−1 position-velocity diagrams along the major (north-south, left) and the minor (east-west, right) axes of the NGC 4194 obtained from the high-resolution data cube within a slit width of 1′′. The contour levels start at 1.5σ in steps of 1.5σ. The colors range from 0 to 0.1 mJy/beam. The result of the fitted Brandt rotation curve, using a fixed inclination value of 40°, is shown on the left.