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Myocarditis 209 Lesson

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was seated during auscultation.

Description

This is a simulation of Myocarditis taken at the apex.

  • 1. The first heart sound is softer than normal because of decreased function of the left ventricle.
  • 2. The second heart sound is normal at the mitral area.
  • 3. There is a third heart sound caused by the failure of the left ventricle.
  • 4. A rectangular, medium-pitched murmur of mild mitral regurgitation is caused by the incomplete closure of the mitral valve leaflets.

In the animated anatomy video, observe the enlarged left ventricle with decreased vigor of contraction. Also notice the regurgitant turbulent flow from the left ventricle into the left atrium which generates the murmur.

Myocarditis is often the result of a viral infection of the myocardium.

Phonocardiogram

Anatomy

Myocarditis 209

Play the animation, taking note of the enlarged left ventricle with decreased vigor of contraction. Observe the regurgitant turbulent flow from the left ventricle into the left atrium which is responsible for the murmur.
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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