A rare presentation of an accessory mitral valve chordae.

The mitral subvalvular apparatus can exhibit complex and unique anatomical variations. Accessory mitral valve chordae (AMVC) typically present as additional thin strands in the left ventricle. Their appearance in the atrium is rare. In the clinical case described, the AMVC was an incidental and intriguing finding during a routine transthoracic echocardiography.