Markedly Split First Heart Sound Lesson
The patient was supine during auscultation.
Description
Splitting of the first heart sound is audible when the split interval is 50 milliseconds or higher. Auscultation is best performed at the tricuspid area to observe such splitting sounds. When the chestpiece is shifted to the apex, the mitral component of the split heart sound becomes louder. Markedly split first heart sounds is an auscultatory indication of premature ventricular contractions or right bundle branch block
Phonocardiogram
Anatomy
Markedly Split First Heart Sound
Authors and Sources
Authors and Reviewers
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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
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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
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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
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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
