Ebstein's Anomaly

This is an example of Ebstein's Anomaly as heard at the tricuspid area. The first heart sound is increased due to thickening of the tricuspid valve leaflets. The second heart sound is normal. A rectangular murmur of tricuspid regurgitation fills all of systole. An opening snap occurs 100 milliseconds into diastole followed by a decrescendo-crescendo murmur of mitral stenosis. These findings are all a manifestation of downward displacement of the tricuspid valve into the right ventricle In the anatomy video you can see the enlarged right atrium and the small right ventricle. The upward plume from the right ventricle to the right atrium represents the systolic murmur. The downward plume from the right atrium to the right ventricle represents the diastolic murmur. This abnormality is congenital in nature.

Auscultation Sounds

Patient Recording

Patient Recording - Half Speed

Position

The patient's position should be supine.

Listening Tips

S1:Increased intensity. Possible splitting
Systole:Rectangular
S2:Possible splitting.
Diastole:Opening snap followed by decrescendo-crescendo murmur

Waveform (Phonocardiogram)

Observe Cardiac Animation

Review the cardiac animation. Notice the enlarged right atrium and the small right ventricle. The upward plume from the right ventricle to the right atrium represents the systolic murmur. The downward plume from the right atrium to the right ventricle represents the diastolic murmur.

Authors and Sources

Authors and Reviewers

EKG heart rhythm modules: Thomas O'Brien.
EKG monitor simulation developer: Steve Collmann
12 Lead Course: Dr. Michael Mazzini, MD.
Spanish language EKG: Breena R. Taira, MD, MPH
Medical review: Dr. Jonathan Keroes, MD
Heart sounds and mentorship: W. Proctor Harvey, MD
Medical review: Dr. Pedro Azevedo, MD, Cardiology
Last Update: 1/8/2023

Sources

Electrocardiography for Healthcare Professionals, 5th Edition Kathryn Booth and Thomas O'Brien
ISBN10: 1260064778, ISBN13: 9781260064773
McGraw Hill, 2019
Rapid Interpretation of EKG's, Sixth Edition
Dale Dublin
Cover Publishing Company
12 Lead EKG for Nurses: Simple Steps to Interpret Rhythms, Arrhythmias, Blocks, Hypertrophy, Infarcts, & Cardiac Drugs
Aaron Reed
Create Space Independent Publishing
Heart Sounds and Murmurs: A Practical Guide with Audio CD-ROM 3rd Edition
Elsevier-Health Sciences Division
Barbara A. Erickson, PhD, RN, CCRN
Clinical Heart Disease W Proctor Harvey, MD
Clinical Heart Disease
Laennec Publishing; 1st edition (January 1, 2009)
The Virtual Cardiac Patient: A Multimedia Guide to Heart Sounds, Murmurs, EKG Jonathan Keroes, David Lieberman
Publisher: Lippincott Williams & Wilkin)
ISBN-10: 0781784425; ISBN-13: 978-0781784429
Project Semilla, UCLA Emergency Medicine, EKG Training Breena R. Taira, MD, MPH

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Ebstein's Anomaly | Lessons with Audio and Video | #117