User Tools

Site Tools


glossary:atrial_septal_defect

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

glossary:atrial_septal_defect [2012/10/16 14:40] (current)
Line 1: Line 1:
 +(ASD): A hole in the septum, the wall, between the atria, the upper chambers of the [[heart]]. Commonly called an ASD. ASDs constitute a major class of [[heart]] formation abnormalities present at birth (congenital cardiac malformations). Normally, when clots in [[vein]]s break off, they travel first to the right side of the heart and, then to the lungs where they lodge as an obstruction (embolus). The [[lung]]s act as a filter to prevent the clots from entering the arterial circulation. However, when there is an ASD, a clot can cross from the right to the left side of the heart, then pass into the arteries as a paradoxical embolism. Once in the arterial circulation,​ a clot can travel to the brain, block a vessel there, and cause a stroke (cerebrovascular accident). Because of the risk of stroke from paradoxical embolism, it is usually recommended that even small ASDs be closed (repaired).
glossary/atrial_septal_defect.txt ยท Last modified: 2012/10/16 14:40 (external edit)