  Recent studies in three dimensional spintronics propose that the \OE rsted
field plays a significant role in cylindrical nanowires. However, there is no
direct report of its impact on magnetic textures. Here, we use time-resolved
scanning transmission X-ray microscopy to image the dynamic response of
magnetization in cylindrical Co$_{30}$Ni$_{70}$ nanowires subjected to
nanosecond \OE rsted field pulses. We observe the tilting of longitudinally
magnetized domains towards the azimuthal \OE rsted field direction and create a
robust model to reproduce the differential magnetic contrasts and extract the
angle of tilt. Further, we report the compression and expansion, or breathing,
of a Bloch-point domain wall that occurs when weak pulses with opposite sign
are applied. We expect that this work lays the foundation for and provides an
incentive to further studying complex and fascinating magnetization dynamics in
nanowires, especially the predicted ultra-fast domain wall motion and
associated spin wave emissions.
