Anomalous great cardiac vein draining directly into the boundary between the superior vena cava and right atrium

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  • Derivation of the Human Cremasteric Artery Viewed from the Distribution Pattern and Anastomosis

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Abstract

The great cardiac vein usually ascends to the anterior interventricular sulcus and turns leftward in the coronary sulcus to transition into the coronary sinus. We present a rare case in which the great cardiac vein drained directly into the boundary between the superior vena cava and the right atrium. The great cardiac vein originated from the apex cordis at the distal 1/3 of the interventricular sulcus, ascended along the anterior interventricular sulcus and drained directly into the boundary between the superior vena cava and the right atrium. In this case, the coronary sinus existed and the oblique vein of the left atrium was absent. In addition, there was no communicating branch between the great cardiac vein and the middle cardiac vein. These findings suggest a possible relationship between the course and drainage of the great cardiac vein and the absence of the oblique vein of the left atrium. Moreover, we speculate that the drainage of the great cardiac vein and the existence of a communicating branch between the great cardiac vein and the middle cardiac vein is a related from of the coronary sinus.

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