ROOT OF PULMONARY TRUNK
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Root of Pulmonary Trunk - Overview, Preview from the app.
ROOT OF PULMONARY TRUNK
What is the root of pulmonary trunk?
- Initial segment of pulmonary artery arising from your right ventricle
- Supports pulmonary valve
- Directs deoxygenated blood from your right ventricle to your lungs
- Components:
- Pulmonary valve leaflets
- Proximal portion of pulmonary trunk
- Ensures smooth blood flow and proper valve function
PULMONARY VALVE
What is the pulmonary valve?
- Semilunar valve between right ventricle and pulmonary artery
- Regulates blood flow from your heart to your lungs
- Composed of three semilunar leaflets:
- Right semilunar leaflet
- Left semilunar leaflet
- Anterior semilunar leaflet
- Opens during ventricular systole
- Allows deoxygenated blood into pulmonary artery
- Closes during diastole
- Prevents backflow into your right ventricle
OPENING OF PULMONARY TRUNK
What is the opening of pulmonary trunk?
- Passage for blood ejection from your right ventricle
- Blood enters your pulmonary artery during ventricular contraction
- Guarded by pulmonary valve
- Ensures unidirectional blood flow
PULMONARY VALVE LEAFLETS
Pulmonary Valve Leaflets, Preview from the app.
Right Semilunar Leaflet
What is the right semilunar leaflet?
- Named for anatomical position
- Positioned on right side relative to other leaflets
Left Semilunar Leaflet
What is the left semilunar leaflet?
- Named for position on left side
- Located opposite left side of aorta
Anterior Semilunar Leaflet
What is the anterior semilunar leaflet?
- Located at front of valve
- Faces anteriorly
Leaflets function together for proper valve operation
SINUSES OF PULMONARY TRUNK
Sinuses of Pulmonary Trunk, Preview from the app.
What are the sinuses of pulmonary trunk?
- Three small dilations at base of pulmonary trunk
- Located just behind each semilunar leaflet
- Important for valve function
Named According to Anatomical Position
Right Sinus
- Positioned relative to aorta on right
Left Sinus
- Located opposite left side of aorta
Anterior Sinus
- Situated at front facing your sternum
Sinuses facilitate valve opening and closing during your cardiac cycle
INTERLEAFLET TRIANGLES OF PULMONARY TRUNK
What are the interleaflet triangles of pulmonary trunk?
- Triangular areas of arterial wall
- Located between pulmonary valve leaflet attachments
- Contribute to leaflet flexibility
- Allow effective valve movement during your cardiac cycle
- Enable proper opening and closing
SUPRAVALVULAR RIDGE OF PULMONARY TRUNK
What is the supravalvular ridge of pulmonary trunk?
- Circular region at level of commissures
- Commissures are points where leaflets meet
- Located at junction of semilunar 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.
