- Assessment of the intrapulmonary ventilation-perfusion distribution after the Fontan procedure for complex cardiac anomalies: relation to pulmonary hemodynamics. Matsushita, T., Matsuda, H., Ogawa, M., Ohno, K., Sano, T., Nakano, S., Shimazaki, Y., Nakahara, K., Arisawa, J., Kozuka, T. J. Am. Coll. Cardiol. (1990)