Anatomical Presentation of the Chordae Tendineae Spuriae on the Left Side of the Heart from a Lateral Viewpoint

Description

Seen from a lateral (peripheral) viewpoint on the left side of the heart, thin chordae tendineae spuriae traverse the left ventricular lumen as irregular tendinous strings distinct from the primary mitral valve chordae. Strands course obliquely between the ventricular wall and trabeculae carneae, often spanning from the interventricular septum toward the lateral free wall and lying inferior to the mitral annulus and valve leaflets. Their relationship to papillary muscles is variable, with attachments that may appear accessory rather than inserting cleanly on the anterior or posterior mitral leaflet. Fine, filamentous anatomy. This view matters because chordae tendineae spuriae can be mistaken for ruptured chordae, fibrin strands, or intracavitary thrombus on echocardiography, and their recognition reduces false-positive interpretations of mitral pathology. In the setting of mitral regurgitation workup, differentiating true leaflet-supporting chordae from accessory left ventricular false tendons helps correlate imaging with surgical findings and avoids attributing abnormal flow jets to structures that do not tether the valve. The lateral perspective also clarifies how these cords cross the ventricular cavity and intersect trabeculations, a common source of diagnostic confusion in two-dimensional planes. Use this illustration in cardiovascular anatomy teaching (gross anatomy, cardiothoracic modules, and echocardiography fundamentals) to discuss normal variants within the left ventricle alongside mitral valve apparatus anatomy. It also fits cardiology and cardiac surgery texts addressing differential diagnosis of left ventricular bands on transthoracic or transesophageal echo, and for radiology education comparing echo with cardiac MRI anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.