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opening snap (OS)

Etiology: - occurs in association with mitral stenosis - more severe mitral stenosis, associated with shorter S2-opening snap interval. Clinical manifestations: - high-pitched sound following S2 by 0.06-0.12 seconds heard at the apex of the heart & left sternal border

General

abnormal heart sound

References

  1. Harrison's Principles of Internal Medicine, 13th ed. Companion Handbook, Isselbacher et al (eds), McGraw-Hill Inc. NY, 1995, pg 327
  2. Mayo Internal Medicine Board Review, 1998-99, Prakash UBS (ed) Lippincott-Raven, Philadelphia, 1998, pg 38