Austin-Flint murmur/phenomenon

Etiology

• severe aortic regurgitation

Pathology

• murmur of relative mitral stenosis
• the murmur occurs due to narrowing of the mitral orifice by the pressure of regurgitant flow on the anterior mitral leaflet

Clinical manifestations

• low-pitched rumbling diastolic murmur best heard at the cardiac apex

Differential diagnosis

• mitral stenosis
  • Austin-Flint murmur distinguishable from mitral stenosis by the absence of a loud first heart sound (S1) & absence of an opening snap

More general terms

• diastolic murmur
• phenomenon

Additional terms

• aortic insufficiency (AI)
• mitral stenosis (MS)
• mitral valve