DSA--a helpful tool in diagnosis of aberrant left pulmonary artery (vascular sling) in adults.

Two new adult patients with aberrant origin of the left pulmonary artery from the right pulmonary artery--pulmonary artery sling--are described, totalling the published adult cases to eight. Differentiation from a mediastinal mass closely mimicking this vascular anomaly is discussed. For the definitive diagnosis, digital subtraction angiography was applied for the first time.

Hydralazine and the tourniquet test in renal vein renin sampling: a comparison.

A total of 36 salt-depleted patients with suspected renovascular hypertension received intravenous hydralazine and 36 were subjected to the tourniquet test at the time of renal vein renin sampling. Simultaneous bilateral renal vein samples were obtained sequentially over 30 minutes. Both measures resulted in an increase in renin secretion.