Chronic hypokalemia due to gastric exclusion after bariatric surgery.

Hypokalemia is a common complication of repeated vomiting or prolonged gastric suction. In the case we observed, a patient presented with chronic hypokalemia due to gastric dilatation and the development of a superior mesenteric artery syndrome several years after gastric banding. This paper presents pre-operative and post-operative illustrations of a rare but potentially serious entity.