Sign in or Join to use this module.

Atrial Septal Defect Lesson

Virtual Auscultation

patient torso with stethoscope chestpiece

patient position during auscultation
The patient's position is supine.

Lesson

Atrial Septal Defect is a congenital condition associated with abnormal blood flow between the left atrium and the right atrium. Before birth there is a large connection between right and left atria. During fetal development, the connection gradually disappears. However, in some cases, this opening persists and is known as an atrial septal defect.

Both the first and second heart sounds are split. The second heart sound splitting is fixed at 80 milliseconds. There is a brief diamond-shaped murmur in early systole and another brief diamond-shaped murmur in early diastole

This murmur was auscultated at the pulmonic position.

In the cardiac animation video, observe an enlarged right atrium and right ventricle. You see turbulent blood flow across the tricuspid valve between the right atrium and the right ventricle (the diastolic murmur). This is caused by blood flow from the left atrium into the right atrium through the atrial septal defect. There is additional turbulent flow into the pulmonary artery causing the systolic murmur.

Waveform




Heart Sounds Video

Play the cardiac animation and look for an enlarged right atrium and right ventricle.


Authors and Sources

Authors and Reviewers

Sources

An error has occurred. This application may no longer respond until reloaded. Reload 🗙