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Mnemonics, Simplified Concepts & Thoughts

Venous Drainage of Heart : Mnemonic

Epomedicine, Jun 12, 2023Jun 12, 2023

Last updated on June 12, 2023

Mnemonic: CAT

1. Coronary sinus (50%): Drains blood from left side of heart → Thebesian valve → Right Atrium

  • Location: Posterior coronary (atrio-ventricular) sulcus
  • Tributaries:
    • Left marginal vein → Great cardiac vein (anterior interventricular sulcus) → Coronary sinus
    • Right marginal vein → Small cardiac vein (right posterior coronary sulcus) → Coronary sinus
    • Middle cardiac vein (posterior interventricular sulcus) → Coronary sinus
    • Oblique vein of left atrium (oblique vein of Marshall)
    • Posterior vein of left ventricle
venous drainage of heart

2. Anterior cardiac veins (20%): Drain blood from right side of heart → Right Atrium

  • Location: Right anterior coronary sulcus

3. Thebesian veins/Venae cordis minimi (30%): Drain deoxygenated blood from endocardium and myocardium → Respective chamber of heart

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PGMEE, MRCS, USMLE, MBBS, MD/MS AnatomyCardiovascular system

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Epomedicine. Venous Drainage of Heart : Mnemonic [Internet]. Epomedicine; 2023 Jun 12 [cited 2025 May 9]. Available from: https://epomedicine.com/medical-students/venous-drainage-of-heart-mnemonic/.

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