Libelle of note

New subdivision used after Lockwood (1991 Plast Reconstr Surg 6:1009-1018) and Herlin et al.(2015 Surg Radiol Anat 37:731-741). Nowadays, most authors have agreed that the subcutaneous tissue consists of three main components, based on a concept by Lockwood (1991) who presented a superficial fascial system, focussing on the trunk and limbs: (1) the superficial adipose tissue; (2) an intermediate membranous later or superficial fascia, which can be either fibrous and/or muscular, and either single or multiple, this layer includes the superficial musculoaponeurotic system (SMAS) of the face, and (3) the deep adipose tissue (Herlin et al. (2015).

The term skeleton fibrosum cordis is a general term for the fibrous scaffold supporting the valves and muscle fibres and electrically isolating the atria from the ventricles. It comprises a fibrous centre, two trigones, four anuli, three ligaments, the membranous septum and some related structures (Saremi et al. 2017 Radiographics 37:1330-1351 and Zimmerman 1966 Ann R Coll Surg Eng 39:348-366).

The right fibrous trigone together with the adjacent membranous septum and the insertion of the tendon of Todaro (currently listed as tendo spatii pyramidalis inferioris) form the so-called central fibrous body of the heart (Saremi et al. 2017 Radiographics 37:1330-1351).

Fila coronaria are fibrous subendocardial cords, extensions of the fibrous trigones, forming about 75% of the anuli fibrosi (Kachlik et al. 2021 Bosn J Basic Med Sci 21:208-220).

Clinical term for a fibrous area between the fibrous trigones, the anulus fibrosus sinister and the anulus aorticus, important in aortic valvular replacement surgery (Saremi et al. 2017 Radiographics 37:1330-1351).

Fila coronaria are fibrous subendocardial cords, extensions of the fibrous trigones, forming about 75% of the anuli fibrosi (Kachlik et al. 2021 Bosn J Basic Med Sci 21:208-220).

The anulus aorticus and anulus trunci pulmonalis are integrated parts of the fibrous skeleton of the heart, encircling the corresponding ostia, and forming a scaffold for the corresponding valves (Saremi et al. 2017 Radiographics 37:1330-1351; Kachlik et al. 2021 Bosn J Basic Med Sci 21:208-220).

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