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Identify the right pulmonary artery.
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Which mitral regurgitation jet direction is most consistent with hypertrophic obstructive cardiomyopathy?
Comprehensive and Detailed Explanation From Exact Extract:
In hypertrophic obstructive cardiomyopathy (HOCM), systolic anterior motion (SAM) of the anterior mitral leaflet causes posteriorly directed mitral regurgitation (MR) jets. The abnormal anterior leaflet motion leads to incomplete leaflet coaptation and regurgitant flow directed toward the posterior left atrium.
Anterior jets are seen with posterior leaflet abnormalities. Central jets are seen in functional MR. Medial jets are less common and depend on leaflet pathology.
This jet direction is an important echocardiographic feature distinguishing HOCM-related MR and is outlined in ASE valvular heart disease and cardiomyopathy guidelines12:ASE Valvular Regurgitation Guidelinesp.220-22516:Textbook of Clinical Echocardiography, 6ep.350-355.