RIGHT VENTRICLE
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Right Ventricle - Overview, Preview from the app.
RIGHT VENTRICLE
What is the right ventricle?
- One of four cardiac chambers
- Located anteriorly
- Forms majority of your heart's anterior surface
- Receives deoxygenated blood from right atrium
- Pumps blood into your pulmonary circulation via pulmonary artery
- Triangular shape
Three Main Components
What are the three components of the right ventricle?
- Inlet
- Trabecular part
- Outlet
- Components ensure efficient blood flow to your lungs for oxygenation
INLET OF RIGHT VENTRICLE
What is the inlet of the right ventricle?
- Contains tricuspid valve apparatus
- Ensures unidirectional blood flow from right atrium
- Prevents backflow during ventricular contraction
Tricuspid Valve Apparatus Components
What are the components of the tricuspid valve apparatus?
- Tricuspid valve leaflets
- Chordae tendineae
- Papillary muscles
Supraventricular Crest
What is the supraventricular crest?
- Muscular ridge between pulmonary and tricuspid valves
- Separates inflow and outflow tracts
- Directs blood flow efficiently through your heart
OUTLET OF RIGHT VENTRICLE
Conus Arteriosus
What is the conus arteriosus?
- Also known as infundibulum
- Conical pouch in upper right ventricle
- Outflow component of right ventricle
- Provides support for pulmonary valve
- Ensures smooth blood flow into your pulmonary artery
TRABECULAR PART OF RIGHT VENTRICLE
Trabecular Part of Right Ventricle, Preview from the app.
What is the trabecular part of the right ventricle?
- Characterized by network of muscular ridges
- Thinner than other components
- Extends down to cardiac apex
Trabeculae Carneae
What are the trabeculae carneae?
- Muscular ridges on ventricular wall
- Coarse trabeculations
- Increase surface area of ventricular wall
- Enhance your heart's contractile ability
- Contribute to efficient blood flow
SEPTOMARGINAL TRABECULA
Septomarginal Trabecula (Moderator Band), Preview from the app.
What is the septomarginal trabecula?
- Also known as moderator band
- Significant muscular band
- Extends from interventricular septum to anterior papillary muscle
- Contains part of right bundle branch
- Facilitates coordinated ventricular contraction in your heart
Divisions
What are the divisions of the septomarginal trabecula?
- Parietal limb
- Anterior limb
Parietal Limb
What is the parietal limb?
- Also called posteroinferior limb
- Proceeds posteriorly
- Supports muscular septum
- Medial papillary muscle typically originates here
- Contributes to tricuspid valve stability and function
Anterior Limb
What is the anterior limb?
- Runs to pulmonary valve leaflet attachment
- Integral to right ventricular structure
- Ensures proper outflow tract alignment and function
APICAL TRABECULATIONS
Coarse Apical Trabeculations
What are the coarse apical trabeculations?
- Robust muscle bundles at right ventricular apex
- Contrast with finer trabeculations of left ventricle
- Vital for mechanical efficiency during your heart's contraction
PAPILLARY MUSCLES OF RIGHT VENTRICLE
Papillary Muscles of Right Ventricle, Preview from the app.
What are the papillary muscles?
- Conical muscular projections extending into ventricular lumen
- Connect to tricuspid valve leaflets via chordae tendineae
- Prevent valve prolapse during ventricular contraction
- Anchor your valve leaflets in position
Three Primary Papillary Muscles
What are the three papillary muscles of the right ventricle?
- Anterior papillary muscle
- Inferior papillary muscle
- Septal papillary muscle
Anterior Papillary Muscle
What is the anterior papillary muscle?
- Largest and most significant
- Originates from anterior wall of right ventricle
- Supported by septomarginal trabecula
- Connects to anterior and posterior tricuspid cusps
Inferior Papillary Muscle
What is the inferior papillary muscle?
- Also called posterior papillary muscle
- Arises from inferior wall of right ventricle
- Attaches to posterior and septal tricuspid cusps
- Aids leaflet stabilization during contraction
Septal Papillary Muscle
What is the septal papillary muscle?
- Smallest of the three
- Variable in presence and size
- Originates from interventricular septum
- Connects to anterior and septal tricuspid cusps
CHORDAE TENDINEAE OF RIGHT VENTRICLE
What are the chordae tendineae?
- Fibrous cords linking papillary muscles to valve leaflets
- Prevent leaflet inversion into atrium during systole
- Maintain efficient valve closure
- Prevent regurgitation
Chordae Tendineae Spuriae
What are the chordae tendineae spuriae?
- Also known as false chordae
- Connect ventricular wall to ventricular wall or papillary muscles
- Do not attach to valve leaflets
BIBLIOGRAPHY
1. Gray H, Lewis W. Angiology. In: Anatomy of the Human Body. 1918. p. 526–542.
2. Gosling JA, Harris PF, Humpherson JR, Whitmore I, Willan PLT. Human anatomy: color atlas and textbook. 6th ed. 2017. 45–58 p.
3. Anderson RH, Spicer DE, Hlavacek AM, Cook AC, Backer CL. (2013). Anatomy of the cardiac chambers. In Wilcox’s Surgical Anatomy of the Heart (4th ed., pp. 13–50). Cambridge University Press.
4. Fritsch H, Kuehnel W. Color Atlas of Human Anatomy. Vol. Volume 2, Color Atlas and Textbook of Human Anatomy. 2005. 10–42 p.
5. Moore K, Dalley A, Agur A. Clinically Oriented Anatomy. Vol. 7ed, Clinically Oriented Anatomy. 2014. 132–151 p.
6. Ho SYen. Anatomy for Cardiac Electrophysiologists: A Practical Handbook. Cardiotext Pub; 2012. 5–27 p.
