Myocarditis Lesson #709
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
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
-
Heart sounds by Dr. Jonathan Keroes, MD and David Lieberman, Developer, Virtual Cardiac Patient.
- Lung sounds by Diane Wrigley, PA
- Respiratory cases: William French
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David Lieberman, Audio Engineering
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Heart sounds mentorship by W. Proctor Harvey, MD
- Special thanks for the medical mentorship of Dr. Raymond Murphy
- Reviewed by Dr. Barbara Erickson, PhD, RN, CCRN.
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Last Update: 11/10/2021
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
- Essential Lung Sounds
Diane S. Wrigley, PA-C
Published by MedEdu LLC - 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
