Pulmonary artery denervation by noninvasive stereotactic radiotherapy: a pilot study in swine models of pulmonary hypertension.

Catheter-based pulmonary artery denervation (PADN) has achieved promising outcomes to treat pulmonary hypertension (PH). We herein present stereotactic body radiotherapy (SBRT) as a novel noninvasive approach for PADN. A single fraction of 15 Gy, 20 Gy or 25 Gy was delivered for PADN in a thromboxane A2 (TxA2) - induced acute PH swine model.

Renal Denervation by Noninvasive Stereotactic Radiotherapy Induces Persistent Reduction of Sympathetic Activity in a Hypertensive Swine Model.

Background We have previously reported the feasibility of noninvasive stereotactic body radiotherapy (SBRT) as a novel approach for renal denervation. Methods and Results Herein, from a translational point of view, we assessed the antihypertensive effect and chronological evolution of SBRT-induced renal nerve injury within 6 months in a hypertensive swine model. Hypertension was induced in swine by subcutaneous implantation of deoxycorticosterone acetate pellets in combination with a high-salt diet.

Noninvasive Stereotactic Radiotherapy for Renal Denervation in a Swine Model.

Background: Catheter-based renal denervation (RDN) has achieved promising outcomes to treat hypertension in recent randomized controlled trials.

Objectives: The purpose of this study was to assess the feasibility, efficacy, and safety of noninvasive stereotactic body radiotherapy (SBRT) as an approach for RDN.

Methods: SBRT was performed in 24 renal arteries from 12 normotensive swine at doses of 25, 35, and 45 Gy (n = 4 each), and an additional 4 swine served as controls.