The proposed study will investigate the effects of etelcalcetide on the bone and blood-vessel
health in patients with CKD-MBD. The investigators will test if etelcalcetide makes bone and
blood-vessels healthier. The study hypotheses are that are that etelcalcetide keeps bones
strong and lowers the risk of calcium deposits in blood vessels. In Aim 1, the investigators
will test if 9-months of treatment with etelcalcetide improves bone strength in twenty ESKD
patients with hyperparathyroidism (HPT) by bone biopsy. In Aim 2, the investigators will test
if 9-months of treatment with etelcalcetide decreases serum propensity to calcify blood
vessels. The potential significance of this study is to provide first-time data on the
ability of etelcalcetide to protect bone and blood-vessel health in patients with ESKD.