Publications by authors named "Michael A. Weber"

Background: There is a paucity of data investigating the impact of antihypertensive drug classes and blood pressure (BP) treatment targets on the incidence of end-stage kidney disease (ESKD). In patients with high-risk hypertension aged 50-80 years or above, we aimed to, 1) compare effects of valsartan, an angiotensin receptor blocker, with amlodipine, a calcium channel blocker and, 2) assess the effect of achieving systolic BP <135 vs ≥135 mmHg on the ESKD incidence.

Methods: The VALUE Trial was a multicenter prospective double-blinded randomized clinical trial in patients with essential hypertension and high cardiovascular risk including known coronary disease, left ventricular hypertrophy and previous stroke, in which ESKD was a secondary endpoint defined as progression to kidney transplant and/or dialysis.

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Multiple sham-controlled clinical trials have demonstrated significant reductions in both office and 24-h blood pressure (BP) following radiofrequency renal denervation (RDN) in the uncontrolled hypertension population. Notably, the blood pressure response varies widely within individual participants, thus showing a clinical need to identify potential RDN "responders" prior to the procedure. Despite multiple analytic efforts, no single parameter, aside from baseline blood pressure, has been consistently associated with BP reduction following RDN.

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  • This study evaluated the effects of testosterone gel 1.62% on 24-hour ambulatory blood pressure (BP) in men with low testosterone levels, revealing inconsistent results from earlier studies on testosterone treatments.
  • Conducted as a single-arm trial with nearly 250 participants over 16 weeks, the study aimed to see if the increase in serum testosterone would significantly affect systolic blood pressure (SBP).
  • The findings indicated a slight rise in average SBP (1.9 mm Hg), but the increase wasn't definitively outside the non-inferiority margin, suggesting that while changes were observed, their clinical significance remains uncertain, particularly among men with hypertension or diabetes.
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Background: Effective patient-centered care requires an adequate understanding of patient preferences for different therapeutic options. We modelled patient preference for blood pressure (BP) management by pharmaceutical or interventional treatments such as renal denervation in patients with different profiles of uncontrolled hypertension.

Methods: Modeling was based on the findings from a previously conducted quantitative discrete choice experiment (DCE).

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Background: Systolic blood pressure (BP) is a key predictor of cardiovascular events, but patients with peripheral artery disease (PAD) are rarely included in hypertension trials. The VALUE trial (Valsartan Antihypertensive Long-Term Use Evaluation) investigated the long-term effects of valsartan- or amlodipine-based treatments on cardiovascular outcomes in patients with hypertension with a high cardiovascular risk. The aim of this subanalysis was to clarify the relationship between achieved BP on treatment and cardiovascular outcomes in patients with hypertension with PAD.

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Background: Catheter-based renal sympathetic denervation (RDN) reduced blood pressure (BP) in multiple randomized sham-controlled trials of patients with uncontrolled hypertension (HTN). We tested proof-of-concept for a more selective treatment strategy, exclusively targeting these areas to improve the efficiency of the procedure.

Methods: The SPYRAL DYSTAL Pilot study was designed to mirror the SPYRAL HTN-OFF MED Pivotal study, enabling comparison with a propensity score adjusted active-control group.

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Background: Renal denervation (RDN) has demonstrated clinically relevant reductions in blood pressure (BP) among individuals with uncontrolled hypertension despite lifestyle intervention and medications. The safety and effectiveness of alcohol-mediated RDN have 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.

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Hypertension is one of the most commonly treated conditions in modern medical practice, but despite its long history, it was largely ignored until the midpoint of the 20th century. This article will review the origins of elevated blood pressure from when it was first appreciated in 2600 BC to its most recent emerging treatments. Awareness of sustained elevations in blood pressure goes back to the Chinese Yellow Emperor's Classic of Internal Medicine (2600 BC); even then, salt was appreciated as a contributor to elevated pressure.

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Background: The SPYRAL HTN-ON MED (Global Clinical Study of Renal Denervation With the Symplicity Spyral Multi-electrode Renal Denervation System in Patients With Uncontrolled Hypertension in the Absence of Antihypertensive Medications)trial showed significant office and nighttime systolic blood pressure (BP) reductions in patients with hypertension following renal denervation (RDN) compared with sham-control patients, despite similar 24-hour BP reductions. We compared antihypertensive medication and BP changes among prespecified subpopulations.

Methods: The multicenter, randomized, sham-controlled, blinded SPYRAL HTN-ON MED trial (n=337) evaluated BP changes after RDN compared with a sham procedure in patients with hypertension prescribed 1 to 3 antihypertensive drugs.

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Article Synopsis
  • Renal denervation (RDN) is a procedure that aims to lower blood pressure (BP) in patients with uncontrolled hypertension, even when they are taking antihypertensive medications.
  • The SPYRAL HTN-ON MED trial was conducted to evaluate the safety and effectiveness of RDN compared to a sham procedure, involving 206 patients in the RDN group and 131 in the control group.
  • Results showed no significant BP difference between the two groups on the primary endpoint, but RDN did lead to lower office BP readings and favorable outcomes in several secondary analyses, with a minimal safety profile.
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Background: The randomized, sham-controlled RADIANCE-HTN (A Study of the Recor Medical Paradise System in Clinical Hypertension) SOLO, RADIANCE-HTN TRIO, and RADIANCE II (A Study of the Recor Medical Paradise System in Stage II Hypertension) trials independently met their primary end point of a greater reduction in daytime ambulatory systolic blood pressure (SBP) 2 months after ultrasound renal denervation (uRDN) in patients with hypertension. To characterize the longer-term effectiveness and safety of uRDN versus sham at 6 months, after the blinded addition of antihypertensive treatments (AHTs), we pooled individual patient data across these 3 similarly designed trials.

Methods: Patients with mild to moderate hypertension who were not on AHT or with hypertension resistant to a standardized combination triple AHT were randomized to uRDN (n=293) versus sham (n=213); they were to remain off of added AHT throughout 2 months of follow-up unless specified blood pressure (BP) criteria were exceeded.

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Background: Hospital mortality after acute myocardial infarction (AMI, ICD-10: I21-I22) is used as OECD indicator of the quality of acute care. The reported AMI hospital mortality in Germany is more than twice as high as in the Netherlands or Scandinavia. Yet, in Europe, Germany ranks high in health spending and availability of cardiac procedures.

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What Is This Summary About?: This is a plain language summary of an article originally published in the journal . Vibegron is a medicine that was approved by the US Food and Drug Administration (also called FDA) in 2020 for treatment of overactive bladder, a condition that causes a frequent and urgent need to urinate. This study took place before the medicine was approved to look at whether vibegron affects blood pressure or heart rate.

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Introduction: We previously completed a trial of renal pelvic denervation for treating hypertension that reduced blood pressure by the 2-month primary endpoint. However, information on the durability of effectiveness is a critical requirement for device therapy and we now report data up to 12 months.

Methods: This was an open-label, single-arm feasibility study in patients with increased blood pressure despite taking an average of 2.

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Background: Ultrasound and radiofrequency renal denervation (RDN) have been shown to safely lower blood pressure (BP) in hypertension.

Aims: The TARGET BP OFF-MED trial investigated the efficacy and safety of alcohol-mediated renal denervation (RDN) in the absence of antihypertensive medications.

Methods: This randomised, blinded, sham-controlled trial was conducted in 25 centres in Europe and the USA.

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Background: Approximately 40% of people with hypertension have left ventricular hypertrophy (LVH) detected by ECG or echocardiography. Because patients with LVH have poor myocardial microcirculation, they may be too sensitive to lowering systolic blood pressure (SBP) too much due to a lack of myocardial perfusion pressure. We aimed to investigate whether the average achieved SBP <130 mm Hg may cause harm in patients with LVH in the Valsartan Antihypertensive Long-Term Use Evaluation trial (VALUE).

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Importance: Ultrasound renal denervation (uRDN) was shown to lower blood pressure (BP) in patients with uncontrolled hypertension (HTN). Establishing the magnitude and consistency of the uRDN effect across the HTN spectrum is clinically important.

Objective: To characterize the effectiveness and safety of uRDN vs a sham procedure from individual patient-level pooled data across uRDN trials including either patients with mild to moderate HTN on a background of no medications or with HTN resistant to standardized triple-combination therapy.

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Importance: Two initial sham-controlled trials demonstrated that ultrasound renal denervation decreases blood pressure (BP) in patients with mild to moderate hypertension and hypertension that is resistant to treatment.

Objective: To study the efficacy and safety of ultrasound renal denervation without the confounding influence of antihypertensive medications in patients with hypertension.

Design, Setting, And Participants: Sham-controlled, randomized clinical trial with patients and outcome assessors blinded to treatment assignment that was conducted between January 14, 2019, and March 25, 2022, at 37 centers in the US and 24 centers in Europe, with randomization stratified by center.

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Background: Discrete choice experiment is a survey method used to understand how individuals make decisions and to quantify the relative importance of features. Using discrete choice experiment methods, we quantified patient benefit-risk preferences for hypertension treatments, including pharmaceutical and interventional treatments, like renal denervation.

Methods: Respondents from the United States with physician-confirmed uncontrolled hypertension selected between treatments involving a procedure or pills, using a structured survey.

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  • The study focuses on resistant hypertension and the potential of the dual endothelin antagonist aprocitentan as a new treatment option, which currently is not targeted by existing medications.
  • Conducted as a multicenter, randomized, phase 3 trial, the PRECISION study involved multiple phases, including a placebo-controlled section and a follow-up phase to evaluate blood pressure changes among participants.
  • Out of 1,965 screened patients, 730 were selected for the study, with a high completion rate across its three parts, indicating the relevance and potential effectiveness of aprocitentan in managing resistant hypertension.
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Importance: Although early trials of endovascular renal denervation (RDN) for patients with resistant hypertension (RHTN) reported inconsistent results, ultrasound RDN (uRDN) was found to decrease blood pressure (BP) vs sham at 2 months in patients with RHTN taking stable background medications in the Study of the ReCor Medical Paradise System in Clinical Hypertension (RADIANCE-HTN TRIO) trial.

Objectives: To report the prespecified analysis of the persistence of the BP effects and safety of uRDN vs sham at 6 months in conjunction with escalating antihypertensive medications.

Design, Setting, And Participants: This randomized, sham-controlled, clinical trial with outcome assessors and patients blinded to treatment assignment, enrolled patients from March 11, 2016, to March 13, 2020.

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