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Musculophrenic Veins
Cardiovascular System

Musculophrenic Veins

Venae musculophrenicae

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Quick Facts

Origin: Union of tributaries from the inferior intercostal spaces.

Course: Ascends obliquely along the margin of the ribs.

Tributaries: Lower anterior intercostal veins.

Drainage: Lower intercostal spaces and respiratory diaphragm.

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The musculophrenic veins originate from the union of anterior intercostal veins of the lower intercostal spaces.


The musculophrenic vein ascends obliquely along the margin of the ribs and drains into the internal thoracic veins at the level of the sixth costal cartilage.


The musculophrenic vein receives the anterior intercostal veins and tributaries from the superior surface of the respiratory diaphragm.

Structures Drained

The musculophrenic veins drain the muscles of the intercostal space, abdominal wall, diaphragm, and lower part of the pericardium.

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Complete Anatomy