Anatomy study note · Thorax

Tricuspid valve

The right atrioventricular valve, with three cusps (anterior, septal and inferior/posterior) guarding the opening from the right atrium into the right ventricle.

Key points

• 3 cusps: anterior, septal, inferior (posterior).
• Chordae + papillary muscles stop the cusps everting.
• Auscultation: lower right sternal border.
• AV valves: subendocardial tissue of the AV canals.
• Valve = fibrous core covered by endothelium.
• Rheumatic disease: mitral > aortic.

The full note in the atlas also covers

Features · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 5, PDF pp. 613, 630–633
• Inderbir Singh’s Human Embryology, ch. 15, PDF pp. 240, 245
• BRS Cell Biology & Histology, 7th ed., ch. 11, PDF p. 196

More from the thorax

• Vagus nerve
• Aortic valve
• Arch of aorta
• Ascending aorta
• Azygos vein
• Brachiocephalic artery
• Brachiocephalic veins
• Bronchopulmonary segments
• Coronary sinus and cardiac veins
• Costal cartilages
• Descending thoracic aorta
• Diaphragm

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