^a O-A and O-B are after 5 hours; O-C and O-D are after 12 hours; 4.0-A and 4.0-B are the first end point; 4.0-C and 4.5-C are the second end point; and 4.0-D and 4.5-D indicate no sonography signal at the end of the trial (third end point).

^b The gray area in the aneurysm represents the spatial extent of the Doppler ultrasound signal.