A sutureless securing device for securing on an opening in a ventricular wall, includes: a hollow main body with an outer surface； a ring received at a first end of the hollow body, this ring being mobile along part of the outer surface of the hollow body； a tubular membrane covering the outer surface, whilst extending between the ring and the second end of the hollow body； a distal end of this tubular membrane, placed on the side of this second end, being self-expandable between a first configuration in which it has a tubular form, and a second configuration in which it defines a first flange extending radially, starting from the hollow body； the other end of this tubular membrane being able to be deformed by the displacement of the ring, such as to form a retention flange, the position of which can vary relative to the first flange.
