Trabeculae carneae of right ventricle

The trabeculae carneae in the right ventricle are irregular, muscular ridges and columns that project from the inner surface of the right ventricular myocardium, predominantly in the apical and mid-ventricular regions. These structures form a complex meshwork that lines the ventricular cavity, distinguishing the heavily trabeculated apical myocardium from the smoother outflow tract (infundibulum) and the inlet region.

The trabeculae carneae are composed of linearly arranged cardiac myocytes, interspersed with variable amounts of collagen, and are structurally distinct from papillary muscles and the compact myocardium of the ventricular wall.

The septomarginal trabecula is a more proeminent and specialized trabecula carnea.