Symplicity China Study

This study, called the Symplicity China Study, is observing long-term outcomes in Chinese patients who have undergone a procedure called renal denervation — a minimally invasive catheter-based treatment that disrupts certain nerve signals to the kidneys — for either treatment-resistant high blood pressure or intolerance to blood pressure medications. **You may be eligible if...** - You are 18 or older - You have resistant hypertension (blood pressure remains above 140 mmHg despite taking three or more blood pressure medications, including a diuretic, for at least 3 months) OR you cannot tolerate blood pressure medications - You have undergone or are about to undergo a renal denervation procedure using the Symplicity Spyral system **You may NOT be eligible if...** - Your kidney arteries are too narrow or too wide for the procedure - You have fibromuscular dysplasia (an abnormal artery condition), renal artery stents placed recently, kidney or adrenal tumors, or significant artery blockages - You are pregnant - Your leg arteries are too narrow for a catheter to be inserted Talk to your doctor to see if this trial is right for you.