New ultrasound surgery could offer hope to patients with high blood pressure who do not respond to drugs, and are at increased risk of cardiovascular diseases, including stroke and heart attack, revealed results of a clinical trial led in the UK by Queen Mary University of London and Barts Health NHS Trust, and supported by the National Institute for Health Research (NIHR).
The results are published in The Lancet and have been presented at the EuroPCR congress in Paris. The international clinical trial, carried out from 2017 to 2018 at St Bartholomew's Hospital in the UK by the NIHR Barts Biomedical Research Centre, tested a one-hour operation called 'renal denervation', which uses ultrasound energy to disrupt the nerves between the kidneys and the brain that carry signals for controlling blood pressure.
Diet and High Blood Pressure
High blood pressure or hypertension is defined as a blood pressure of above 140 mm Hg (systolic) and or 90mm Hg (diastolic).
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‘New surgery involving ultrasound energy targets the nerves connected to the kidney has been found to significantly reduce blood pressure in patients with hypertension.’
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146 patients in the United States, France, Germany, the Netherlands, Belgium and the United Kingdom were randomised to receive either renal denervation or a 'sham procedure' - the surgical equivalent of a placebo. Patients also remained off blood pressure medications for two months unless specified blood pressure levels were exceeded.
After two months, the renal denervation group experienced an 8.5 mm Hg reduction in blood pressure, which was a 6.3 mm Hg greater reduction compared with the sham group.
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It stealthily creeps in and catches people unawares. Find out more about this 'silent killer' by participating in the quiz.
More than 66 per cent of subjects treated with renal denervation demonstrated a 5 mm Hg or greater reduction in blood pressure, compared with 33 per cent in the sham group.
No major adverse events were reported in either group, and the blood pressure lowering effect of renal denervation was consistent across sex and ethnicity.
UK Principal Investigator Dr Melvin Lobo from Queen Mary University of London and Barts Health NHS Trust said: "These results leave us clinicians in no doubt that this ultrasound-based therapy works to improve blood pressure control - at least in the short term. Further larger trials will be needed to confirm the efficacy and safety of the technology, but we hope that they could lead to renal denervation therapy being offered as an alternative to lifelong medications for hypertension."
The study has limitations including the short follow-up time of two months. This was done for safety reasons to minimise the duration of patients being off antihypertensive medications. Longer follow-up of this trial and additional numbers of treated patients will be necessary to provide greater assurance of safety and to exclude rare adverse events.
Source: Eurekalert
Quiz on Hypertension
It stealthily creeps in and catches people unawares. Find out more about this 'silent killer' by participating in the quiz.
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More than 66 per cent of subjects treated with renal denervation demonstrated a 5 mm Hg or greater reduction in blood pressure, compared with 33 per cent in the sham group.
No major adverse events were reported in either group, and the blood pressure lowering effect of renal denervation was consistent across sex and ethnicity.
UK Principal Investigator Dr Melvin Lobo from Queen Mary University of London and Barts Health NHS Trust said: "These results leave us clinicians in no doubt that this ultrasound-based therapy works to improve blood pressure control - at least in the short term. Further larger trials will be needed to confirm the efficacy and safety of the technology, but we hope that they could lead to renal denervation therapy being offered as an alternative to lifelong medications for hypertension."
The study has limitations including the short follow-up time of two months. This was done for safety reasons to minimise the duration of patients being off antihypertensive medications. Longer follow-up of this trial and additional numbers of treated patients will be necessary to provide greater assurance of safety and to exclude rare adverse events.
Source: Eurekalert
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 Tremor, Movement-Disorder Sufferers Could Profit From MR-Guided Focused Ultrasound Surgery: StudyThe use of MR-guided focused ultrasound surgery (MRgFUS) may be very effective in alleviating tremor and other types of movement disorders as demonstrated by research findings. | Advertisement
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