Anomalous Chord of the Left Atrium without Involvement of the Mitral Valve

Abstract

An anomalous chord from the left side of the atrial septum to the left atrial free wall was incidentally noted on transthoracic echocardiography in a 14-year-old boy with vasovagal syncope. Previously reported cases of anomalous chords in the left atrium were associated with the mitral valve leaflets in all but two cases. This is the first reported case of an echocardiographic diagnosis of anomalous left atrial chord without insertion of the chord into the mitral valve.

Cuerda tendinosa auricular aberrante. Una causa infrecuente de prolapso mitral

“…Son estructuras filamentosas de tejido fibroso o fibromuscular que en la mayoría de los casos unen la cara auricular de un velo mitral con la pared auricular. Excepcionalmente, la cuerda no se inserta en la válvula, sino en el ventrículo izquierdo o en la misma aurícula (2) . Existen pocos casos descritos en la literatura y en la mayor parte de los mismos se trata de una cuerda tendinosa que se origina alrededor de la fosa oval y que termina insertándose en la cara auricular de la válvula mitral, cerca de la comisura posteromedial del velo anterior, en sus segmentos A2 o A3 (3)(4)(5)(6)(7) .…”

Incidental finding of aberrant mitral valve chorda during a transesophageal echocardiography evaluation for suspected endocarditis

“…Aberrant mitral valve chorda with attachment in the left atrium is a rare finding with only a handful of cases reported in the literature . While our patient did not primarily present with cardiovascular symptoms, she was incidentally found to have an anomalous chorda arising from the A2 scallop of the anterior mitral valve leaflet.…”

Aberrantly inserted chordae tendineae without significant mitral regurgitation

“…Aberrantly inserted chordae tendineae in the left atrial side are a rare find. Less than 30 cases have been reported since 1947, with and without mitral valve involvement . An anomalous chord of the left atrium could be considered within normal human anatomic variation .…”

“…Less than 30 cases have been reported since 1947, with and without mitral valve involvement. [1][2][3][4] An anomalous chord of the left atrium could be considered within normal human anatomic variation. 5 However, this young patient with aberrantly inserted chordae tendineae and without significant mitral regurgitation should be closely monitored, because mitral regurgitation could suddenly become significant.…”