Prominent Chordal Network on Echocardiography
A prominent chordal network on echocardiography appears as highly echogenic (bright white) linear structures extending from the papillary muscles to the mitral valve leaflets, best visualized within the left ventricular cavity below the level of the mitral valve leaflets.
Echocardiographic Appearance
The chordae tendineae are part of the mitral valve apparatus and appear as:
- Strong ultrasound reflections creating bright, linear echoes within the left ventricle 1, 2
- Located below the mitral valve leaflets, extending from papillary muscles to the ventricular surface of the valve leaflets
- Best visualized in multiple views at high frame rates (>50 Hz) with color Doppler turned off 1
When the chordal network is prominent, you'll see:
- Highly echogenic densities within the left ventricular body, distinctly inferior to the mitral valve leaflets 3
- Multiple linear structures that can be traced from their origin at the leaflet margins to the papillary muscle tips 4
- The structures are more easily differentiated from mitral annular calcification by their inferior location within the LV cavity 3
Optimal Visualization Technique
Turn off color Doppler and visualize the entire mitral apparatus in multiple views at high frame rates (>50 Hz) 1. This is critical because:
- Color Doppler overlay obscures the underlying anatomy
- Multiple views (parasternal long-axis, apical views, transgastric views) are needed to fully assess the chordal network 1, 2
- 3D transesophageal echocardiography from the transgastric approach provides superior visualization of the submitral apparatus 4
Clinical Context
A prominent chordal network may represent:
- Normal anatomic variation - false chordae tendineae are found in approximately 9% of children and are associated with innocent heart murmurs 5
- Fibrotic thickening - appears as highly echogenic densities, often associated with mitral annular calcification and may be linked to mitral regurgitation 3
- Calcification - creates very bright echoes and may be associated with valvular dysfunction 3, 6
Common Pitfalls to Avoid
- Don't confuse prominent chordae with mitral annular calcification - chordal densities are located more inferiorly within the LV body, not at the annular level 3
- Don't mistake anterior leaflet override for prolapse in secondary MR - the anterior leaflet never moves superior to the annulus despite appearing prominent 1
- Don't rely on single views - comprehensive assessment requires multiple imaging planes to properly characterize the chordal network 1, 2