Patent ductus arteriosus chest x ray

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Priyamvada Singh, M.B.B.S. [2], Cafer Zorkun, M.D., Ph.D. [3], Assistant Editor-In-Chief: Kristin Feeney, B.S. [4]

Overview

The findings on chest X ray depends on the degree of shunting between left and right system.

Chest X Ray

Small PDA

• Normal heart size and vascularity.

Medium-Sized PDA

• Occasionally, the ductus can be seen as a separate convexity between the aortic knob and the pulmonary artery segments.
• Cardiomegaly related to left atrium and left ventricular volume overloads.
• Increase in the pulmonary vascular markings.
• The ascending aorta may be prominent due to increased flow.

Large-Sized PDA

• Similar to a PDA complicated by pulmonary vascular disease.
• Left ventricular overload regresses by adolescence and the heart size may revert to normal.
• The apex may be tilted upward reflecting right ventricular hypertrophy.
• The pulmonary trunk and its branches are markedly dilated and may show central calcification, but in the outer third there is an abrupt decrease in vascularity.