• See Also
  1. Pediatric Murmur
  • Epidemiology
  1. Ages affected: School age to adolescence (5 to 14 years old)
  • Physiology
  1. Exaggerated normal vibratory ejection sound from the pulmonary vasculature
  • Signs
  1. Intensity: Grade I-II of VI murmur
  2. Soft, early to mid-Systolic Murmur at left upper sternal border (between 2nd and 3rd ribs)
  3. Crescendo-Decrescendo murmur
  4. Increased murmur in high output states
  5. Loudest when supine and decreased when upright or during breath holding
  • Differential Diagnosis
  1. Atrial Septal Defect (ASD)
  2. Pulmonic stenosis
  • Course
  1. Innocent Murmur
  • Resources
  1. Pulmonary Flow Murmur (USMLE Clinic, YouTube)
    1. https://www.youtube.com/watch?v=SIKxT6e7f0o