Anatomy study note · Thorax

Mitral valve

The left atrioventricular valve, with two cusps guarding the opening from the left atrium into the left ventricle.

Key points

• 2 cusps: anterior (larger) + posterior.
• Auscultation: apex beat (5th left space, 9 cm from the midline).
• Rheumatic fever → stenosis/regurgitation.
• 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. 615, 630–633
• Inderbir Singh’s Human Embryology, ch. 15, PDF p. 240
• BRS Cell Biology & Histology, 7th ed., ch. 11, PDF p. 196

More from the thorax

• Pulmonary trunk
• Pulmonary valve
• Pulmonary veins
• Ribs
• Right atrium
• Right coronary artery
• Right ventricle
• Serratus posterior muscles
• Sternum
• Superior vena cava
• Sympathetic trunk
• Thymus

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