Innocent Murmur 657 Lesson

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was supine during auscultation.

Description

An innocent murmur is seen in children and in adults with pregnancy, hyperthyroidism, exercise, and anemia conditions.

The murmur is heard in early systole. An innocent murmur is of short duration and has a frequency range of 120Hz to 250Hz. It is best auscultated in the pulmonic area and increases in intensity with inspiration. It can be heard with either the bell or diaphragm.

In this recording S1 and S2 are normal. Diastole is silent. The short duration and mid-range frequency characterize an innocent murmur.

Phonocardiogram

Anatomy

Innocent Murmur 657


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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