Table 1

Classification of tendinous chords of the tricuspid valve (adapted from Silver and colleagues8)

ChordSite of insertion
Leaflet chords
1. Rough zone chordsRough zone and free margin
2. Free edge chordsFree edge
3. Deep chordsRough zone
4. Basal chordsBasal zone (2 mm perimeter of the annular region)
Interleaflet chords
1. Fan shaped chordsCommissures between the leaflets