We present results from an ongoing survey dedicated to the ionized gas
kinematics of Virgo cluster spiral galaxies using Fabry-Perot interferometry.
Our goal is to study the environmental effects on galaxy evolution in the Virgo
cluster. We report here on the Halpha distribution map and velocity field of
NGC 4438, the prototype of an interacting galaxy near the centre of the
cluster.Comment: 2 pages, 1 figure, to be published in "IAU Symposium 217, Recycling
intergalactic and interstellar matter", ASP Conf Serie