Silent and Audible Persistent Ductus Arteriosus: An Angiographic Study
2003
Persistent ductus arteriosus (PDA) murmurs become silent probably due to the direction of the jet across the ductus arteriosus when entering the pulmonary artery. Out of 15 children with silent PDA, 14 demonstrated a ductal flow not contacting and away from the anterior wall of the main pulmonary artery. In 15 children with a continuous murmur caused by a PDA, 12 exhibited a ductal flow toward and reaching the anterior wall of the MPA. There was no correlation between the presence of a murmur and the size of the arterial duct in this study.
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