Abstract: A self-expanding cardiovascular occlusion apparatus including a predetermined pattern of wire and three collinear bands, whereby pushing the bands together causes the two exposed braided or helical sections between them to flatten to two disk-like shapes. The disks are then forced outward relative to the middle band, causing the exposed braided or wound pattern to invaginate. The final shape is similar to two cones attached end to end. The device is heat treated to maintain this configuration. In use, the device is straightened to its cylindrical form, installed in the distal end of a device pusher which is advanced through a small diameter catheter installed in a blood vessel When the device is expelled from the device pusher, it returns to its expanded shape and lodges in a blood vessel, for example. Once lodged in the vessel, the device will initiate thrombus formation which will occlude the vessel.