Left Ventricle

Left Ventricle

• Left ventricle: : It’s the chamber in the heart responsible for pumping oxygenated blood from the heart to the body. It is mainly situated behind the right ventricle when viewed from the front. (1,3)

The inlet of the left ventricle:

• The inlet of the left ventricle: This is the entrance into the left ventricle. It is guarded by the orifice of the mitral valve. (1,2,3)
• Aortic vestibule: It is the region of the left ventricle that is positioned inferior to the aortic orifice. (1,2)

Trabecular part of left ventricle

• Trabecular part of left ventricle: The trabecular part is the inner, part of the ventricle walls that feature muscular projections. It extends towards the apical portion of the left ventricle. (2,3)

Papillary muscles of left ventricle

• Papillary muscles of left ventricle: Are two muscular protrusions situated on the inner aspect of the left ventricle. They are connected to the mitral valve via tendinous cords. (1,2,3)
  • Superior papillary muscle of left ventricle: It is the largest papillary muscle of the left ventricle; it has its origin in the lateral wall of the left ventricle. (1,2)
  • Inferior papillary muscle of left ventricle: It is smaller than the superior papillary muscle; it has its origin in the inferior wall of the left ventricle near the septum. (1,2)
  • Chordae tendineae of left atrioventricular valve: they are fibrous string cords that anchor the mitral valve leaflets to the left ventricle. The majority of the chordae tendinae connect the valve to the papillary muscles. (1,3)
  • Chordae tendineae spuriae of the left ventricle Are cords that do not attach to the atrioventricular valves. (3,4)

Trabeculae carneae of left ventricle

• Trabeculae carneae of left ventricle: Raised muscular bands that are situated in the trabecular part of the right ventricle. They are smaller than the trabecular carnae of the right ventricle. (2,3)
  • Fine apical trabeculations: Fine, mesh-like structures located on the inner surface of the apical portion of the left ventricle, which are notably finer than those in the right ventricle as per the text. (2,3)

Bibliography

1. Gray H, Lewis W. Angiology. In: Anatomy of the human body. 1918. p. 526–42
2. Anderson, R. H., Spicer, D. E., Hlavacek, A. M., Cook, A. C., & Backer, C. L. (2013). Anatomy of the cardiac chambers. In Wilcox’s Surgical Anatomy of the Heart (4th ed., pp. 13–50). Cambridge University Press.
3. Faletra, F. F., & Narula, J. (2017). Imaging of Cardiac Anatomy. Clinical Cardiac Pacing, Defibrillation and Resynchronization Therapy, 15–60.
4. Kosiński A, Grzybiak M, Dubaniewicz A, Kȩdziora K, Makarewicz W, Kozłowski D. False chordae tendineae in right ventricle of adult human hearts – morphological aspects. Arch Med Sci. 2012 Nov 11 ;8(5):834.

The structure and organization of anatomical terms used in this text follow the guidelines provided by FIPAT (2019) in their publication: FIPAT. (2019). Terminologia Anatomica (2nd ed.). FIPAT.library.dal.ca. Federative International Programme for Anatomical Terminology. Retrieved May 7, 2023, from https://fipat.library.dal.ca/TA2/