atrial septal defect


atrial septal defect
= ASD
a congenital defect of the heart in which there is a hole in the partition (septum) separating the two atria (see septal defect). There are two kinds of ASD – ostium primum and ostium secundum. Ostium primum defects are rarer but more serious as the defect lies low down near the valves of the heart. Affected children often have heart failure, although in some a heart murmur detected at routine medical examinations is the only indication of the defect. Ostium secundum defects lie away from the valves and most children have no symptoms; the defect is most commonly indicated by the detection of a heart murmur, and may not be apparent until adulthood. Small defects may close spontaneously. Most persisting ostium secundum defects can now be treated with an umbrella-shaped closure device passed to the heart through the venous system under X-ray and ultrasound control. Ostium primum defects still require surgical closure.
Intrauterine surgical techniques now enable a fetus in which an ASD has been detected to proceed to full term by using the placental circulation as a substitute for the extracorporeal circulation that would otherwise be required.

The new mediacal dictionary. 2014.

Look at other dictionaries:

  • Atrial septal defect — PFO redirects here. For the airport, see Paphos International Airport. Atrial septal defect Classification and external resources Heart of human embryo of about thirty five days ICD 10 …   Wikipedia

  • atrial septal defect — ▪ pathology       congenital opening in the partition between the two upper chambers (atria) of the heart. The most common atrial septal defect is persistence of the foramen ovale, an opening in this partition that is normal before birth and that …   Universalium

  • atrial septal defect — (ASD) a congenital defect of the heart in which there is a hole in the partition (septum) separating the two atria (see septal defect). There are two kinds of ASD ostium primum and ostium secundum. Ostium primum defects are rarer but more serious …   Medical dictionary

  • atrial septal defect — noun an abnormal opening between the left and right atria of the heart • Hypernyms: ↑septal defect …   Useful english dictionary

  • Atrial septal defect (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… …   Medical dictionary

  • Ostium primum atrial septal defect — Classification and external resources Schemating drawing showing the location of different types of ASD, the view is into an opened right atrium. HV: right ventricle; VCS: superior caval vein; VCI: inferior caval vein; 1: upper sinus venosus… …   Wikipedia

  • Дефект Межпредсердной Перегородки (Atrial Septal Defect, Asd) — см. Дефект перегородки. Источник: Медицинский словарь …   Медицинские термины

  • septal defect — a hole in the partition (septum) between the left and right halves of the heart. This abnormal communication is congenital due to an abnormality of heart development in the fetus. It may be found between the two atria (see atrial septal defect)… …   Medical dictionary

  • septal defect — a hole in the partition (septum) between the left and right halves of the heart. This abnormal communication is congenital due to an abnormality of heart development in the fetus. It may be found between the two atria (see atrial septal defect)… …   The new mediacal dictionary

  • septal defect — noun a congenital abnormality in the septum between the left and right sides of the heart • Hypernyms: ↑congenital heart defect • Hyponyms: ↑atrial septal defect, ↑ventricular septal defect …   Useful english dictionary


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