Aortic Valve Stenosis, a Precipitating Factor of Recurrent Bleed in Colonic Angiodysplasia: A Literature Review.

Angiodysplasia (also known as angioectasia) is a lesion characterized by abnormal, dilated small blood vessels in the mucosa and submucosal layers of the GI tract. With the estimated low incidence of active GI bleeding from these lesions, angiodysplasia can be challenging to diagnose. The presence of aortic stenosis has increased the recognition rate of angiodysplasia, especially in the elderly. Despite the associations between aortic stenosis and angiodysplasia (Heyde's syndrome) revealed in several studies, the etiology of Heyde syndrome is still debatable, which has led to the proposition of several hypotheses that are reviewed in this article. This activity will help review the meaning of Heyde's syndrome, epidemiology, proposed pathophysiology, diagnosis, and management by surveying articles published between 1955 and 2021 on PubMed. We used search terms such as "colonic angiodysplasia," "arteriovenous malformation," "Heyde syndrome," "refractory gastrointestinal bleed," "aortic valve stenosis," and "acquired von Willebrand disease." Findings revealed an association between aortic stenosis and lower gastrointestinal (GI) bleed.