The phrenic nerve runs posterior to the right pulmonary veins.

Study for the EPU Electrophysiology Exam with comprehensive questions and explanations. Enhance your knowledge with flashcards and a variety of question formats to ensure you are prepared to excel!

Multiple Choice

The phrenic nerve runs posterior to the right pulmonary veins.

Explanation:
The phrenic nerve in the thorax runs along the pericardium and reaches the hilum of the lung on the anterior surface of the root of the lung. At the right hilum it lies in front of the lung structures, including the pulmonary vessels, so it is not posterior to the right pulmonary veins. The right pulmonary veins drain from the lungs into the left atrium behind the heart, while the phrenic nerve is on the anterior aspect of the root, crossing in front of the hilum. So the idea that it runs posterior to the right pulmonary veins is not correct.

The phrenic nerve in the thorax runs along the pericardium and reaches the hilum of the lung on the anterior surface of the root of the lung. At the right hilum it lies in front of the lung structures, including the pulmonary vessels, so it is not posterior to the right pulmonary veins. The right pulmonary veins drain from the lungs into the left atrium behind the heart, while the phrenic nerve is on the anterior aspect of the root, crossing in front of the hilum. So the idea that it runs posterior to the right pulmonary veins is not correct.

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