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What mechanism(s) underlies the disappearance of the murmur in the infant with the ventricular septal defect?

April 26, 2017defect disappearance infant mechanism murmur septal underlies ventricular

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What mechanism(s) underlies the disappearance of the murmur in the infant with the ventricular septal defect?

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The murmur disappeared in the infant with the VSD because of spontaneous closure. This occurs in over 40% of patients. Closure may occur by fibrous obliteration progressing from the margins or by adherence of the tricuspid valve to the defect, where it acts as a patch.