Abstract
The authors studied the circulation time from the right elbow to the right ventricle, right elbow-left ventricle, and pulmonary circulation times by fluorodensography with radiopaque substance. The study was performed in twenty-one normal subjects: nineteen with ages between 17 and 44 years, and a boy of 12. A pathologic case was also studied. The equipment utilized is described in detail as well as the standardization of the various instruments and the technique for the recording and interpretation of the tracings. The circulation times obtained were: elbow-left ventricle, 5.61 seconds (mean value), with ±0.59 standard deviation; elbow-right ventricle, 1.63 seconds with a standard deviation of ±0.23; pulmonary circulation time, 3.98 seconds, with a standard deviation of ±0.61. In the case with an aneurysm of the pulmonary artery the circulation time from elbow to left ventricle was 41 seconds; elbow-right ventricle, 4.2 seconds; and the pulmonary circulation time, 36.8 seconds. A comparative study is made on the different number of cycles that show changes in the circulation time tracings from elbow to left ventricle and elbow-right ventricle. An analysis is made on the results obtained in the pathologic case.
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