Fludrocortisone supression test (FST) is the gold standard test for the diagnosis of primary hyperaldosteronism. A value of >6 ng/dl and simultaneous plasma renin-aldosterone ratio (PRA)  <1.0 ng/ml/hour, confirm primary hyperaldosteronism.
Primary hyperaldosteronism diagnostic study of choice
Primary hyperaldosteronism other imaging findings
Adrenal insufficiency diagnostic study of choice
Pheochromocytoma other diagnostic studies
Pulmonary hypertension diagnostic study of choice
Hyperkalemia diagnostic study of choice
Electrocardiographic findings in left ventricular hypertrophy
Nephrotic syndrome diagnostic study of choice