What does atrial septal defect mean?
Definitions for atrial septal defect
atrial sep·tal de·fect
This dictionary definitions page includes all the possible meanings, example usage and translations of the word atrial septal defect.
Princeton's WordNet
atrial septal defectnoun
an abnormal opening between the left and right atria of the heart
Wikidata
Atrial septal defect
Atrial septal defect is a form of congenital heart defect that enables blood flow between two compartments of the heart called the left and right atria. Normally, the right and left atria are separated by a septum called the interatrial septum. If this septum is defective or absent, then oxygen-rich blood can flow directly from the left side of the heart to mix with the oxygen-poor blood in the right side of the heart, or vice versa. This can lead to lower-than-normal oxygen levels in the arterial blood that supplies the brain, organs, and tissues. However, an ASD may not produce noticeable signs or symptoms, especially if the defect is small. A "shunt" is the presence of a net flow of blood through the defect, either from left to right or right to left. The amount of shunting present, if any, determines the hemodynamic significance of the ASD. A "right-to-left-shunt" typically poses the more dangerous scenario. During development of the fetus, the interatrial septum develops to separate the left and right atria. However, a hole in the septum called the foramen ovale, allows blood from the right atrium to enter the left atrium during fetal development. This opening allows blood to bypass the nonfunctional fetal lungs while the fetus obtains its oxygen from the placenta. A layer of tissue called the septum primum acts as a valve over the foramen ovale during fetal development. After birth, the pressure in the right side of the heart drops as the lungs open and begin working, causing the foramen ovale to close entirely. In approximately 25% of adults, the foramen ovale does not entirely seal. In these cases, any elevation of the pressure in the pulmonary circulatory system can cause the foramen ovale to remain open. This is known as a patent foramen ovale, which is a type of atrial septal defect.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of atrial septal defect in Chaldean Numerology is: 2
Pythagorean Numerology
The numerical value of atrial septal defect in Pythagorean Numerology is: 6
Translations for atrial septal defect
From our Multilingual Translation Dictionary
- عيب الحاجز الأذينيArabic
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"atrial septal defect." Definitions.net. STANDS4 LLC, 2024. Web. 2 May 2024. <https://www.definitions.net/definition/atrial+septal+defect>.
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