The pulmonary veins drain into the left atrium.

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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 pulmonary veins drain into the left atrium.

Explanation:
Oxygenated blood returns from the lungs to the heart via the pulmonary veins, which drain directly into the left atrium. This setup is what allows the left atrium to collect oxygen-rich blood before it moves through the mitral valve into the left ventricle and out to the systemic circulation. It’s also what distinguishes these veins from the pulmonary arteries, which carry deoxygenated blood from the right heart to the lungs. Normally there are four pulmonary veins—two from each lung—but variations can occur with certain congenital conditions. In standard anatomy, the statement is true.

Oxygenated blood returns from the lungs to the heart via the pulmonary veins, which drain directly into the left atrium. This setup is what allows the left atrium to collect oxygen-rich blood before it moves through the mitral valve into the left ventricle and out to the systemic circulation. It’s also what distinguishes these veins from the pulmonary arteries, which carry deoxygenated blood from the right heart to the lungs. Normally there are four pulmonary veins—two from each lung—but variations can occur with certain congenital conditions. In standard anatomy, the statement is true.

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