Total anomalous pulmonary venous connection pathophysiology

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Associate Editor-In-Chief:Cafer Zorkun, M.D., Ph.D. [2]; Keri Shafer, M.D. [3] Priyamvada Singh, MBBS [[4]]

Assistant Editor-In-Chief: Kristin Feeney, B.S. [[5]]

Pathophysiology

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In patients of Total anomalous pulmonary venous connection (TAPVC)there is a mixing of oxygenated pulmonary venous blood with deoxygenated blood from systemic circulation

It mixing of blood could occur at three levels i.e. supracardiac, infracardiac and cardiac. In the former two the mixing occurs outside the heart and in latter inside the heart (right atrium).

This mixed deoxygenated blood is shunted from right-to-left side of heart(patent foramen ovale, atrial septal defect or patent ductus arteriosus). This right to left shunting causes cyanosis in the patient.

Since, the right side of heart is receiving blood both from pulmonary and systemic circulation it leads to development of pulmonary hypertension, right atrial and ventricular hypertrophy. Level of obstructions seen are-

• Supracardiac
• Infracardiac
• Cardiac
• Other — Other sources of obstruction include stenotic, tortuous or atretic pulmonary .

Unobstructed forms — No significant stenosis of the pulmonary veins.

External Links

• Total anomalous pulmonary venous connection information from Seattle Children's Hospital Heart Center

Additional Reading

• Moss and Adams' Heart Disease in Infants, Children, and Adolescents Hugh D. Allen, Arthur J. Moss, David J. Driscoll, Forrest H. Adams, Timothy F. Feltes, Robert E. Shaddy, 2007 ISBN 0781786843