Aortic Stenosis Murmur - Severe #2
In Severe Aortic Stenosis there is a diamond shaped systolic murmur which lasts throughout systole. The murmur is loud and higher pitched than the murmur of mild aortic stenosis. It is caused by calcification of the aortic valve leaflets. There is a fourth heart sound heard in late diastole (just before the first heart sound). This is caused by the increased left ventricular wall thickness and stiffness. S1 is normal. S2 is louder than normal. In fact, you are hearing only the accentuated pulmonic component of S2 due to heart failure on the left side. The aortic ejection click heard in mild cases of valvular aortic stenosis is gone. In the anatomy video you can see the greatly thickened left ventricular wall and the almost totally immobile aortic leaflets.Auscultation Sounds
Position
The patient's position should be sitting.
Listening Tips for Aortic Stenosis Murmur - Severe #2
Systole:Diamond shaped. Louder & higher-pitched than mild casesWaveform (Phonocardiogram)
Observe Cardiac Animation for Aortic Stenosis Murmur - Severe #2
Authors and Sources
Authors and Reviewers
- EKG heart rhythm modules: Thomas O'Brien.
- EKG monitor simulation developer: Steve Collmann
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12 Lead Course: Dr. Michael Mazzini, MD.
- Spanish language EKG: Breena R. Taira, MD, MPH
- Medical review: Dr. Jonathan Keroes, MD
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Heart sounds and mentorship: W. Proctor Harvey, MD
- Medical review: Dr. Pedro Azevedo, MD, Cardiology
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Last Update: 1/8/2023
Sources
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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
Aortic Stenosis Murmur - Severe #2 | #90
