Third heart sound

external

• Synonyms

  • HS III
  • 3rd heart sound
  • S3
  • Gallop rhythm

• Causes

  • Mitral regurgitation
  • Right ventricular failure
  • Hypertrophic cardiomyopathy
  • Aortic regurgitation
  • Ventricular septal defect
  • Patent ductus arteriosus

• Parents

  • Auscultatory heart sign

• Description

  • "Early diastolic sound
  • caused by sudden backflow"