D sign (right ventricle)

Last revised by Joachim Feger on 14 Mar 2021

A D-shaped left ventricle or flattening of the interventricular septum with a D-shaped configuration is a feature described with significant right ventricular (RV) overload / right heart strain such as that occurring with complications of a sizable pulmonary embolic event. It was initially described in SPECT  / scintigraphic studies although similar appearances have also been described in echocardiography1 and CT scans in similar situations.

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