History of any of the following diseases:

* congestive heart failure

* MI within the last 6 months

* history of cerebrovascular accident

* significant valvular disease

* malignancy

Currently taking any vitamin D products

Mean systolic blood pressure values \> 190 or diastolic blood pressure values \> 100 mm/Hg during the preceding 30 day period prior to screening

Currently being titrated on therapy with an angiotensin converting enzyme inhibitor or angiotensin receptor blocker

Two consecutive serum calcium values greater than 10.2 mg/dL or Ca x P \> 55 mg2/dL2

Currently receiving erythropoiesis stimulating agent or intravenous iron therapy

Pregnant or breastfeeding

Vascular Reactivity in Chronic Kidney Disease (CKD) Patients Receiving Paricalcitol Versus Placebo