This video demonstrates the heart sounds of an atrial septal defect (ASD). Due to the fact of increased flow across the pulmonary valve, the pulmonary heart sound is delayed, and louder, with no effect of respiration.

Clinical features associated with atrial septal defect:

  • Irregularly irregular pulse (often asymptomatic, especially earlier in life)
  • Normal JVP, unless there has been development of right heart failure
  • Non-displaced apex beat
  • Possibly a palpable thrill
  • Widely split 2nd heart sound (fixed)
  • Ejection systolic murmur
  • Possible mid-diastolic flow murmur of the tricuspid valve