atrial septal defect

[n] - an abnormal opening between the left and right atria of the heart
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Atrial septal defect

a hole located in the wall between the two upper chambers of the heart
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atrial septal defect

<cardiology> An inherited condition where there is nonclosure of the foramen ovale at birth, resulting in congenital heart disease. Usually asymptomatic until the third or fourth decades of life. ... Symptoms include exertional shortness of breath, fatigue and palpitations. ... Acronym: ASD ... (12 Jan 1998) ...
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atrial septal defect

noun an abnormal opening between the left and right atria of the heart
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atrial septal defect

a congenital heart defect in which the ostium primum or ostium secundum (openings in the septum primum of the embryonic heart) fails to close completely after birth. When an opening remains between the atria, some of the oxygen-rich blood from the left atrium passes into the right atrium and travels back to the lungs with...
Found on http://www.encyclo.co.uk/local/21001

atrial septal defect

congenital opening in the partition between the two upper chambers (atria) of the heart. The most common atrial septal defect is persistence of the ... [2 related articles]
Found on http://www.britannica.com/eb/a-z/a/121

Atrial septal defect

Atrial septal defect (ASD) is a form of congenital heart defect that enables blood flow between the left and right atria via the interatrial septum. The interatrial septum is the tissue that divides the right and left atria. Without this septum, or if there is a defect in this septum, it is possible for blood to travel from the left side of the he
Found on http://en.wikipedia.org/wiki/Atrial_septal_defect

atrial septal defect

(hole in the heart) A hole in the wall (septum) that separates the two upper chambers (atria) of the heart. An atrial septal defect (ASD), or 'hole in the heart,' allows blood to flow from one atrium to the other, usually from the left side to the right side. This causes extra b...
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Atrial Septal Defect

One of the most common heart defects. A normal heart has four separate chambers and the upper chambers, atria, are divided with the septum. An atrial septal defect occurs when there is a hole in the septum. Blood then flows through the hole, which causes an increased amount of blood volume in the lungs. Children that have this birth def...
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atrial septal defect

Type: Term Definitions: 1. a congenital defect in the septum between the atria of the heart, caused by failure of the foramen primum or secundum to close normally; may involve endocardial cushions of the atrioventricular canal; occasionally there is strong evidence of autosomal dominant inheritance [MIM*108800]. In varying degree, it is also a comm
Found on http://www.medilexicon.com/medicaldictionary.php?t=23146

ATRIAL SEPTAL DEFECT

Rare congenital defect characterized by the presence of a hole in the wall or septum separating the left and right atria of the heart.
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