Additional Study Information: The purpose of this project is to collect more data about the safety and effectiveness of renal denervation (disabling of kidney nerves) for the treatment of uncontrolled hypertension. For therenal denervation procedure, the Vessix Renal Denervation System is used. The system consists of a catheter (a thin tube) and a radio frequency (RF) generator (power generator). The treatment involves the nerves that surround the blood vessel that supplies the kidney (kidney artery). The generator sends energy through the kidney artery to disable the surrounding nerves.