Ventricular Septal DefectThis is an example of ventricular septal defect as heard at the tricuspid position. Ventricular Septal Defect is a congenital condition associated with abnormal blood flow between the left ventricle and the right ventricle. During fetal development a wall develops creating a right and left ventricle. In a percentage of individuals a defect in the wall persists allowing blood flow from the left ventricle into the right ventricle. This condition is known as a ventricular septal defect. The first heart sound is normal. The second heart sound is unsplit. There is a third heart sound followed by a short diamond shaped diastolic murmur. A medium pitched murmur fills all of systole. In the anatomy video you see an enlarged right ventricle and an enlarged left atrium. You see turbulent blood flow from the left ventricle into the right ventricle through the up portion of the septum (the systolic murmur). There is further turbulent flow into the left ventricle from the left atrium causing the diastolic murmur. This is caused by VSD induced increased blood flow across the mitral valve.
Half Speed Patient Sounds
The patient's position should be supine.
Auscultation TipsDiastole:S3 in patient recordings. Simulated sound includes a brief murmur
Observe Cardiac Animation
Authors and Sources
Authors and Reviewers
- ECG heart rhythm modules: Thomas O'Brien.
- ECG monitor simulation developer: Steve Collmann
12 Lead Course: Dr. Michael Mazzini, MD.
- Spanish language ECG: Breena R. Taira, MD, MPH
- Medical review: Dr. Jonathan Keroes, MD
- Medical review: Dr. Pedro Azevedo, MD, Cardiology
- Last Update: 11/8/2021
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
Cover Publishing Company
12 Lead EKG for Nurses: Simple Steps to Interpret Rhythms, Arrhythmias, Blocks, Hypertrophy, Infarcts, & Cardiac Drugs
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
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