CORONARY SINUS

 

ORIGIN: Great cardiac vein

COURSE/DRAINAGE: This vein begins at its junction with the great cardiac vein, which joins it at the left border of the heart just close to the left auricle. It then runs in the base of the heart below the left auricle, at the coronary sulcus, receiving tributaries from the middle cardiac vein and small cardiac vein. It terminates by entering into the right atrium to the left of the inferior vena caval opening into that chamber. Its opening is guarded by a valve called the valve of coronary sinus. It drains all veins of the heart except the venae cordis minimae (drain into all chambers) and the anterior cardiac veins (drain into the right atrium).

TRIBUTARIES:

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Small cardiac vein

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Middle cardiac vein

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Great cardiac vein

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Oblique vein of left atrium

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Posterior vein of left ventricle

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Atrial tributaries

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Ventricular tributaries.

 

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