Atrial septal defect

Schematic drawing showing the location of different types of ASD, the view is into an opened right atrium.
HV: right ventricle; VCS: superior vena cava; VCI: inferior vena cava
1: upper sinus venosus defect; 2: lower sinus venosus defect; 3: secundum defect; 4: defect involving coronary sinus; 5; primum defect.

Ultrasound picture of the heart, seen in a subcostal view. The apex towards the right, atria to the left. ASD secundum seen as a discontinuation of the white band of the atrial septum. Enlarged right atrium below. Enlarged pulmonary veins seen entering left atrium above.

Atrial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart. Normally, the atria are separated by a dividing wall, 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.

单词	Patent Foramen Ovale
释义	Patent Foramen Ovale 英语百科 Atrial septal defect Atrial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart. Normally, the atria are separated by a dividing wall, 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.
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Patent Foramen Ovale

Atrial septal defect