Inner Profile of the Right Ventricle Chordae Tendineae Spuriae in Cross Section

Description

Running along the inner surface of the right ventricle, accessory chordae tendineae spuriae (false chords) traverse the cavity as slender fibrous or fibromuscular bands distinct from the tricuspid valve chordae. A cross-sectional cut through the anterior right ventricle and interventricular septum brings the septomarginal trabecula (trabecula septomarginalis, moderator band) into profile, with spuriae chords spanning from septal endocardium toward the free wall and trabecular ridges. Papillary muscle heads and trabeculae carneae sit inferior to the valve plane, while the septum remains medial and the ventricular free wall lateral. Small structures. Big implications. False chords in the right ventricle are a recurring point of confusion in anatomy labs and in echocardiography, where they can mimic ruptured tricuspid chordae, vegetations, or intracavitary thrombus when seen as linear echogenic strands. This sectional perspective clarifies what attaches to valve leaflets (true chordae to the anterior, posterior, and septal tricuspid cusps) versus what simply bridges endocardial surfaces, and it reinforces the relationship between the septomarginal trabecula and the right bundle branch, a landmark relevant during repair of ventricular septal defects. Awareness of these bands also matters in catheter navigation and device placement across the right ventricle, where trabeculations and spuriae chords can snag hardware or complicate interpretation of intracardiac imaging. Cardiology and gross anatomy instructors can pair this view with parasternal short-axis echo images or CT/MRI cross sections to teach normal right ventricular internal anatomy and common pitfalls. It also suits surgical atlases discussing right ventricular approaches and conduction-sparing maneuvers around the septomarginal region. Anatomical accuracy verified by SciePro's Medical Advisory Board.