Physiologically Split Second Heart Sound Lesson

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was supine during auscultation.

Description

Timing between the aortic and pulmonic components of the second heart sound varies during normal respiration. This causes splitting of the second heart sound.

Maximum splitting occurs at peak inspiration. In this recording, the S2 split is 60 milliseconds at peak inspiration with no splitting at peak expiration.

Phonocardiogram

Anatomy

Physiologically Split Second Heart Sound


Authors and Sources

Authors and Reviewers

Sources

  • Heart and Lung Sounds Reference Library Diane S. Wrigley
    Publisher: PESI
  • Impact Patient Care: Key Physical Assessment Strategies and the Underlying Pathophysiology
    Diane S Wrigley & Rosale Lobo
  • Practical Clinical Skills: Lung Sounds
  • PESI Faculty - Diane S Wrigley
  • Case Profiles in Respiratory Care 3rd Ed, 2019
    William A.French
    Published by Delmar Cengage
  • Essential Lung Sounds by William A. French
    Published by Cengage Learning, 2011
  • Understanding Lung Sounds Steven Lehrer, MD
  • Clinical Heart Disease W Proctor Harvey, MD
    Clinical Heart Disease
    Laennec Publishing; 1st edition (January 1, 2009)
  • Heart and Lung Sounds Reference Guide
    PracticalClinicalSkills.com




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