An interventional study of PHC ON and PHC OFF in Hypertension Resistant to Conventional Therapy, Bradycardia and Atrioventricular Block, sponsored by BackBeat Medical Inc. Terminated at 12 sites in 7 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-18.
Sponsored by BackBeat Medical Inc · Not applicable, Interventional, and Treatment
The purpose of this double blind randomized study is the evaluation of the safety and efficacy of the Moderato System.
The Moderato implantable pulse generator is indicated for patients who have hypertension and also require a dual chamber pacemaker in order to reduce their blood pressure.
The primary objectives of this study are to provide evidence of safety and clinical efficacy of the anti-hypertensive effects of the Moderato System. This will be accomplished by evaluating changes in blood pressure in an active treatment vs. a control patient population for a period of 6 months.
The device will be considered to have a clinical effectiveness with regard to its anti-hypertension functions if there is a statistically significant and clinically meaningful reduction in mean 24-hour ambulatory systolic blood pressure in the treatment group compared to the control group.
Protocol CS-03 Ver 1.1 (NCT02837445) was amended at the advice of the Scientific Advisory to protocol CS-03 Version 3.0 with more stringent hypertension inclusion criteria and different observation intervals for efficacy and safety.
In CS-03 Version 3.0 the time of the primary efficacy endpoint was reduced from 6 months to 3 months post randomization which was deemed a suitable interval for the chronic effect, whereas for the safety endpoint, the period was lengthened from 6 month to 12 months post randomization to better monitor potential risks of the treatment on cardiac function (Blinding period was increased from 6 to 12 months). Protocols were thus split in order to allow better clarification to the difference in the time to the primary endpoints for efficacy and safety between the two CIP versions and simplify data analysis.
Protocol Ver 3.0 prescribes data analysis of all patients randomized under version 1.1 to be performed once they complete the 6 months follow-up as set in protocol version 1.1 (NCT0283744). It is expected that \~40 patients will be randomized according to protocol version 1.1 prior to the enrollment of patients according to protocol version 3.0. The results will be considered as interim analysis.
The recruitment for the protocol version 1.1 is now completed. Total of 47 patients were randomized according to protocol version 1.1 and all patients completed the follow-up period for the primary endpoint.
Patients are currently being followed up for the study "extension period".
47 studies on the registry are indexed under Hypertension Resistant to Conventional Therapy; 3 are open to participants now.
This study's enrollment of 70 is above the median of 57 across 36 interventional studies indexed under Hypertension Resistant to Conventional Therapy.
Browse Hypertension Resistant to Conventional Therapy studies →BackBeat Medical Inc is the lead sponsor of 12 studies on the registry; 2 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
A “mini-stroke”: temporary stroke-like symptoms caused by reduced blood flow to part of the brain, spinal cord or eye, without signs of a new stroke on a scan.
Stroke symptoms need emergency care at once, even if they go away.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
LVEF (left ventricular ejection fraction)
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
TIA (transient ischaemic attack)
A “mini-stroke”: temporary stroke-like symptoms caused by reduced blood flow to part of the brain, spinal cord or eye, without signs of a new stroke on a scan.
Stroke symptoms need emergency care at once, even if they go away.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Eligible patients randomized after optimization phase to PHC ON for 6 months Patients continue standard or modified anti-hypertension medical regime at discretion of the investigator
Device: PHC ON
Eligible patients randomized after optimization phase to pacemaker only (PHC OFF) for 6 months. Patients continue standard or modified anti-hypertension medical regime at discretion of the investigator
Device: PHC OFF
Eligible patients randomized after optimization phase to PHC ON for 6 months. Patients continue standard or modified anti-hypertension medical regime at discretion of the investigator
Eligible patients randomized after optimization phase to PHC OFF for 6 months. Patients continue standard or modified anti-hypertension medical regime at discretion of the investigator.
Rate of composite of major cardiac events
including heart failure, clinically significant arrhythmias eg, persistent or increased atrial fibrillation, serious ventricular arrhythmias, myocardial infarction, stroke, heart failure, renal failure and/or related safety events that result in death
Time frame: 6 months post Randomization
Change in average 24 hour systolic ambulatory blood pressure
Time frame: Week 3 pre Randomization and 6 months post Randomization
This study is terminated, as verified in Jun 2026. You cannot join it, but the record below documents what was studied.
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Hypertension Resistant to Conventional Therapy →
BackBeat Medical Inc