Definitions for aortic coarctation

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U.S. National Library of Medicine

  1. Aortic Coarctation

    A birth defect characterized by the narrowing of the AORTA that can be of varying degree and at any point from the transverse arch to the iliac bifurcation. Aortic coarctation causes arterial HYPERTENSION before the point of narrowing and arterial HYPOTENSION beyond the narrowed portion.

Freebase

  1. Coarctation of the aorta

    Coarctation of the aorta, or aortic narrowing, is a congenital condition whereby the aorta narrows in the area where the ductus arteriosus inserts. Aortic coarctation is considered when a section of the aorta is narrowed to an abnormal width. The word “coarctation” means narrowing. Coarctations are most common where the aorta — the major artery leading away from the heart — arches toward the abdomen and legs. The aortic arch may be small in babies with coarctations. Other cardiac defects may also occur when coarctation is present, typically occurring on the left side of the heart. When a patient has a coarctation, the left ventricle has to work harder. Since the aorta is narrowed, the left ventricle must generate a much higher pressure than normal in order to force enough blood through the aorta to deliver blood to the lower part of the body. If the narrowing is severe enough, the left ventricle may not be strong enough to push blood through the coarctation, thus resulting in lack of blood to the lower half of the body. Physiologically its complete form is manifested as Interrupted aortic arch.

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