although previous investigations of the procedure have had conflicting results.
Renal sympathetic denervation (RSD) was associated with statistically significant reductions in blood pressure assessed by 24-hour ambulatory, daytime ambulatory, and office measurements in the analysis of six trials including a total of 977 participants.
However, the benefit was particularly pronounced in more recent randomized trials that had few patients with isolated systolic hypertension, had highly experienced operators; used more complete techniques of radiofrequency ablation, used novel approaches such as endovascular renal denervation, and used efficacy endpoints such as clinical outcomes, according to investigator Partha Sardar, MD, of Brown University, Providence, R.I., and his colleagues.
“Altogether, the present study affirms the safety and efficacy of renal denervation for blood pressure reduction, and highlights the importance of incorporating the previously described modifications in trial design,” wrote Dr. Sardar and his coauthors. The report is in the Journal of the American College of Cardiology.
While initial trials of catheter-based denervation of renal arteries were positive, three blinded randomized, controlled trials showed no difference in blood pressure between the procedure and a sham procedure, the investigators said. Those findings led to several small, sham-controlled trials that incorporated the aforementioned changes.