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Effect of Alcohol-Mediated Renal Denervation on Blood Pressure in the Presence of Antihypertensive Medications: Primary Results from the TARGET BP I Randomized Clinical Trial.
Circulation 2024 April 9
BACKGROUND: Renal denervation (RDN) has demonstrated clinically relevant reductions in blood pressure among individuals with uncontrolled hypertension despite lifestyle intervention and medications. The safety and effectiveness of alcohol-mediated RDN has not been formally studied in this indication.
METHODS: TARGET BP I is a prospective, international, sham-controlled, randomized, patient- and assessor-blinded trial investigating the safety and efficacy of alcohol-mediated RDN. Patients with office systolic blood pressure (SBP) ≥150 and ≤180 mmHg, office diastolic BP ≥90 mmHg and mean 24-hour ambulatory SBP ≥135 and ≤170 mmHg, despite prescription of 2-5 antihypertensive medications were enrolled. The primary endpoint was the baseline-adjusted change in mean 24-hour ambulatory systolic BP at 3 months post procedure. Secondary endpoints include mean between-group differences in office and ambulatory BP at additional time points.
RESULTS: Among 301 patients randomized 1:1 to RDN or sham control, RDN was associated with a significant reduction in 24-hour ambulatory SBP at 3 months (mean ± standard deviation -10.0 ± 14.2 mmHg versus -6.8 ± 12.1 mmHg, treatment difference -3.2 mmHg, 95% confidence interval [CI] -6.3, 0.0 mmHg; P =0.0487). Subgroup analysis of the primary endpoint revealed no significant interaction across predefined subgroups. At 3 months, the mean change in office SBP was -12.7 ± 18.3 mmHg and -9.7 ± 17.3 mmHg (difference, -3.0, 95% CI -7.0, 1.0; P =0.173), for RDN and sham, respectively. No significant differences in ambulatory or office diastolic BP were observed. Adverse safety events through 6 months were uncommon with 1 instance of accessory renal artery dissection in the RDN group (0.7%). No significant between-group differences in medication changes or patient adherence were identified.
CONCLUSIONS: Alcohol-mediated RDN was associated with a modest but statistically significant reduction in 24-hour ambulatory systolic BP compared with sham control. No significant differences between groups in office BP or 6-month major adverse events were observed.
METHODS: TARGET BP I is a prospective, international, sham-controlled, randomized, patient- and assessor-blinded trial investigating the safety and efficacy of alcohol-mediated RDN. Patients with office systolic blood pressure (SBP) ≥150 and ≤180 mmHg, office diastolic BP ≥90 mmHg and mean 24-hour ambulatory SBP ≥135 and ≤170 mmHg, despite prescription of 2-5 antihypertensive medications were enrolled. The primary endpoint was the baseline-adjusted change in mean 24-hour ambulatory systolic BP at 3 months post procedure. Secondary endpoints include mean between-group differences in office and ambulatory BP at additional time points.
RESULTS: Among 301 patients randomized 1:1 to RDN or sham control, RDN was associated with a significant reduction in 24-hour ambulatory SBP at 3 months (mean ± standard deviation -10.0 ± 14.2 mmHg versus -6.8 ± 12.1 mmHg, treatment difference -3.2 mmHg, 95% confidence interval [CI] -6.3, 0.0 mmHg; P =0.0487). Subgroup analysis of the primary endpoint revealed no significant interaction across predefined subgroups. At 3 months, the mean change in office SBP was -12.7 ± 18.3 mmHg and -9.7 ± 17.3 mmHg (difference, -3.0, 95% CI -7.0, 1.0; P =0.173), for RDN and sham, respectively. No significant differences in ambulatory or office diastolic BP were observed. Adverse safety events through 6 months were uncommon with 1 instance of accessory renal artery dissection in the RDN group (0.7%). No significant between-group differences in medication changes or patient adherence were identified.
CONCLUSIONS: Alcohol-mediated RDN was associated with a modest but statistically significant reduction in 24-hour ambulatory systolic BP compared with sham control. No significant differences between groups in office BP or 6-month major adverse events were observed.
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