Endologix, Inc. has applied for and received an IDE for the investigation of a bifurcated device to exclude aneurysms of the abdominal aorta. The Arizona Heart Institute experience indicates that this small study design will prove successful. Using the basic technology of the current approved IDE, it is Arizona Heart Institute's intention to expand the scope of application and design in order to address a greater population basis suffering from aneurysmal disease. In this regard, the basic Endologix device designs will be applied to appropriate patients beyond the scope of the current bifurcated IDE. Patients meeting the criteria for the Endologix IDE will be enrolled independently in that study and followed precisely in order to comply with the study design. Patients with aneurysmal disease not currently filling the criteria for a bifurcated abdominal aortic prosthetic but who could potentially benefit from the technology to exclude aneurysmal disease will be considered from this study.