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Clinical Introduction
A man in his 20s with Down syndrome presented to cardiology clinic for evaluation of a murmur. He denied symptoms. He had no prior history of invasive cardiac procedures or cardiac surgery. His examination revealed a murmur. An echocardiogram was performed and a diagnostic image is shown in figure 1.
Question
Based on the colour Doppler M-mode echocardiographic image (figure 1), what is the most likely cause …
Footnotes
Contributors APT drafted the initial manuscript, which was reviewed and edited by EK. DH obtained the echocardiographic image and reviewed the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Provenance and peer review Not commissioned; externally peer reviewed.