[An unusual protodiastolic bruit: the click of an aberrant mitral cord]

An asymptomatic adult woman without clinical cardiac disease had an unusual early diastolic heart sound. All usual causes of this finding were excluded: it was not a delayed pulmonary component of the second heart sound, a mitral or tricuspid opening snap, an early diastolic third heart sound or a pericardial vibration. The only apparent cause was a left ventricular false tendon extending from the septal endocardium to the left ventricular free wall, demonstrated by 2D echocardiography. This type of aberrant intracardiac band has already been described but the possibility of early diastolic stretching of this structure giving rise to an abnormal early diastolic sound does not seem to have been previously reported.