Width of azygos vein related to central venous pressure.
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Enlargement of the azygos vein is a well known anomaly in roentgenograms of patients with congestive heart failure (3). A report correlating the width of the azygos vein with venous pressure could not be found in the English literature. Since roentgenographic assessment of central venous pressure (CVP) would be useful in many clinical circumstances, we decided to determine the predictive value of this measurement. Materials and Method Initially, anteroposterior and oblique portable roentgenography of the chest was attempted on patients in the Intensive Care Unit (ICU) at the time CVP was recorded. An elective oblique roentgenogram and an additional overpenetrated anteroposterior view were necessary for better demonstration of the azygos vein. Because the maneuvers for these caused the patient much discomfort, the procedures were discontinued. Instead, anteroposterior films of patients in whom the CVP was measured within an hour of roentgenography were studied retrospectively. This study comprises a total ...
[1] A. Read,et al. The mediastinum in portal hypertension. , 1961, Clinical radiology.