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The Pulmonary Circulation Time and Radiocardiographic Pattern in Bilharzial Cor Pulmonale^*

Muhammad Abdel Razzak

There is a close correlation between radiocardiographic picture, pulmonary circulation time (PCT), and the clinico-radiologic grades of bilharzial cor pulmonale. In grade I both PCT and radiocardiogram were normal. On the other hand, radiocardiography in cases of grade II revealed an increase in the duration of the descending limb of the R wave as well as moderate prolongation of PCT. Lastly, grade III was characterized by marked prolongation of PCT, together with a large R wave in the radiocardiogram due to prolongation of both the ascending and descending limbs of this wave.

^* This work has been partly presented at the Tenth Annual Meeting of the Society of Nuclear Medicine, held in Montreal, June 1963.

Formerly fellow in nuclear medicine, Johns Hopkins University, Baltimore, Maryland.