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| AuthorsNelson B Schiller, MDBryan Ristow, MDXiushui Ren, MD | Section EditorWarren J Manning, MD | Deputy EditorSusan B Yeon, MD, JD, FACC |
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Imaging the right ventricle is an essential and highly informative portion of the comprehensive echocardiographic evaluation. Patients with an abnormality of the left heart on echocardiographic examination often have concomitant right ventricular abnormalities.
The normal right ventricle can be recognized by a number of echocardiographic features. Its free wall is <0.4 mm thick, its apex is heavily trabeculated and dominated by the septal marginal trabeculation or moderator band, and its most active contraction occurs along its longitudinal axis. This latter feature creates a striking annular plane motion recognized best in the apical four chamber and subcostal views. In all views, the body of the right ventricle is visually subordinate to the companion left ventricle.
ECHOCARDIOGRAPHIC EVALUATION OF THE RIGHT VENTRICLE
Evaluation of the right ventricle (RV) involves evaluation of wall thickness, shape, ventricular cavity size and content, as well as regional and global contractile function.
Wall thickness — Right ventricular hypertrophy is recognized by inspecting the wall of the right ventricular outflow tract in the precordial views, the free wall in the apical view, and the diaphragmatic wall in the subcostal view. Generally, the RV free wall in diastole is approximately 3 to 4 mm thick; if it exceeds 5 mm it is considered hypertrophied (figure 1A-B) [1,2].
Right ventricular wall thickness, when inspected or measured in the subcostal view, allows differentiation of the wall thickness from cavity trabeculations [3]. Contrast enhancement of M-mode or two dimensional images can aid in measuring wall thickness [4,5].
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