HERO Study: Helping Evaluate Reduction in Obesity

Inclusion Criteria: * Patient and investigator have made a decision, independent of the study, to proceed with LAP-BAND AP® implantation. * Male or female aged ≥ 18 years. * BMI ≥ 40 or a BMI ≥ 35 with one or more severe co-morbid conditions, or those who are 45.5 Kg / 100 lbs or more over their estimated ideal weight. Exclusion Criteria: * Prior bariatric surgery. * Type I diabetes patients. * Participating in another ongoing clinical study with concomitant diagnostic or therapeutic intervention that would reasonably be expected to alter patterns of care, use of medications or the outcomes under study.