Read by QxMD icon Read

Denervation radiofrequency

Zhixin Jiang, Xiujuan Zhou, Chun Chen, Ying Wang, Ping Fang, Jie Geng, Gang Zhang, Qijun Shan
To investigate the efficacy of renal denervation (RDN) on the recurrence of ventricular arrhythmia (VA) in Asian patients with implantable cardioverter defibrillators (ICDs).Eight ICD patients with recurrent VA episodes underwent RDN using an off-the-shelf saline-irrigated catheter. The pre- and postprocedural VA episodes were counted via ICD interrogation. All patients underwent successful RDN without any complications related to radiofrequency catheter ablation. The median follow-up was 15 months (range 6-30), and the median VA episodes per month were significantly reduced from 3...
February 23, 2018: International Heart Journal
Monica Sigovan, Salim Si-Mohamed, Pierre-Yves Courand, Brahim Harbaoui, Marc Sapoval, Sébastien Bros, Philippe C Douek, Pierre Lantelme, Loic Boussel
OBJECTIVES: Endovascular renal denervation (RDN) using catheter-based radiofrequency (RF) ablation has emerged as a potential treatment option for drug-resistant hypertension. Its efficacy is currently under debate. We aimed to evaluate the capability of contrast-enhanced magnetic resonance imaging (MRI) to assess the effects of RDN on the renal arterial wall in patients presenting with drug-resistant hypertension. METHODS: Patients were included prospectively following institutional review board approval and written informed consent...
February 21, 2018: European Radiology
Atsushi Sakaoka, Hisako Terao, Shintaro Nakamura, Hitomi Hagiwara, Toshihito Furukawa, Kiyoshi Matsumura, Kenichi Sakakura
BACKGROUND: Ablation lesion depth caused by radiofrequency-based renal denervation (RDN) was limited to <4 mm in previous animal studies, suggesting that radiofrequency-RDN cannot ablate a substantial percentage of renal sympathetic nerves. We aimed to define the true lesion depth achieved with radiofrequency-RDN using a fine sectioning method and to investigate biophysical parameters that could predict lesion depth. METHODS AND RESULTS: Radiofrequency was delivered to 87 sites in 14 renal arteries from 9 farm pigs at various ablation settings: 2, 4, 6, and 9 W for 60 seconds and 6 W for 120 seconds...
February 2018: Circulation. Cardiovascular Interventions
Dirk Prochnau, Matthias Hoyme
Electrical storm (ES) represents a critical state of electrical instability. We describe a patient with coronary artery disease, mechanical aortic valve replacement, and reduced left ventricular function with recurrent ICD shocks. Despite medical treatment with beta-blocker and amiodarone, and after successful ablation of different VT morphologies in combination with substrate modification, ES could not be controlled. We performed renal denervation (RDN) to reduce arrhythmic burden. Thereafter, patient remained free from sustained and non-sustained VTs at 6-month follow-up...
January 30, 2018: Journal of Electrocardiology
Matthew K Bagg, James H McAuley, G Lorimer Moseley, Benedict Martin Wand
No abstract text is available yet for this article.
January 19, 2018: British Journal of Sports Medicine
Alberto Morganti, Giuseppe Mancia
Resistant hypertension (RH) can be diagnosed if blood pressure (BP) is not controlled with the combination of three antihypertensive drugs, including a diuretic, all at effective doses. Patients affected by this condition exhibit a marked increase in the risk of cardiovascular and renal morbid and fatal events. They also exhibit an increased activity of the sympathetic nervous system which is likely to importantly contribute at the renal and other vascular levels to the hypertensive state. Almost 10years ago renal denervation (RDN) by radiofrequency thermal energy delivery to the walls of the renal arteries was proposed for the treatment of RH...
December 27, 2017: European Journal of Internal Medicine
Esther Maas, Johan Juch, Frank Huygen
No abstract text is available yet for this article.
December 12, 2017: JAMA: the Journal of the American Medical Association
Yakov Vorobeychik, Milan P Stojanovic, Zachary L McCormick
No abstract text is available yet for this article.
December 12, 2017: JAMA: the Journal of the American Medical Association
Ming-Chih Kao, Michael S Leong, Sean Mackey
No abstract text is available yet for this article.
December 12, 2017: JAMA: the Journal of the American Medical Association
Varun Rimmalapudi, Jeff Buchalter, Aaron Calodney
No abstract text is available yet for this article.
December 12, 2017: JAMA: the Journal of the American Medical Association
Laura Mauri, Kazuomi Kario, Jan Basile, Joost Daemen, Justin Davies, Ajay J Kirtane, Felix Mahfoud, Roland E Schmieder, Michael Weber, Shinsuke Nanto, Michel Azizi
Catheter-based renal denervation is a new approach to treat hypertension via modulation of the renal sympathetic nerves. Although nonrandomized and small, open-label randomized studies resulted in significant reductions in office blood pressure 6months after renal denervation with monopolar radiofrequency catheters, the first prospective, randomized, sham-controlled study (Symplicity HTN-3) failed to meet its blood pressure efficacy end point. New clinical trials with new catheters have since been designed to address the limitations of earlier studies...
January 2018: American Heart Journal
Alison Stout, Paul Dreyfuss, Nathan Swain, Shannon Roberts, Eldon Loh, Anne Agur
Background: Current sacroiliac joint (SIJ) cooled radiofrequency (RF) is based on fluoroscopic anatomy of lateral branches (LBs) in three specimens. Recent studies confirm significant variation in LB positions. Objectives: To determine if common fluoroscopic needle placements for cooled SIJ RF are adequate to lesion all S1-3 LBs. If not, would different targets improve lesion accuracy? Methods: The LBs of 20 cadavers were dissected bilaterally (40 SIJs), and 26 G radiopaque wires were sutured to the LBs...
November 23, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
Jessica Arias Garau
Facet or zygapophysial joint pain is commonly seen in the aging population. Interventional procedures, such as facet joint nerve blocks, facet intraarticular injections, and radiofrequency denervation, are used for the diagnosis and treatment of axial spinal chronic neck and low back pain. The focus of this article is to understand how radiofrequency denervation works in the cervical and lumbar spine and to be able to properly select appropriate patients who might benefit from this safe and effective procedure...
February 2018: Physical Medicine and Rehabilitation Clinics of North America
Zhijie Shen, Chunyan Weng, Zhihui Zhang, Xiaoyan Wang, Kan Yang
To explore the roles of glutamate acid decarboxylase 65 (GAD65) and angiotensin II type 1 receptor (AT1 R) in the action of renal sympathetic denervation (RSD) on obesity-induced hypertension in canines. Thirty-two beagles were randomly divided into a hypertensive model (n = 22) and control (n = 10) groups. A hypertensive canine model was established by feeding a high-fat diet. Twenty hypertensive beagles were randomized equally to a sham-surgery and RSD-treated group receiving catheter-based radiofrequency RSD...
2018: Clinical and Experimental Hypertension: CHE
Munnan Al-Najjim, Rohit Shah, Mahmoud Rahuma, Omar Abdul Gabbar
The lumbar facet joints have been implicated as one of the causes of low-back pain syndromes. About 15-40% of patients who presented with chronic low-back pain was attributed to lumbar facet joint pain. The purpose of this study was to analyse whether radiofrequency denervation is better than SHAM procedure in treating chronic low-back pain caused by lumbar zygapophysial joints pathology. From the four identified randomised control trials, there is conflicting evidence at an intermediate 3-6-month stage, however; one study demonstrates statistical significance of radiofrequency denervation at 3 months...
March 2018: Journal of Orthopaedics
Anthony J Short, Jessi Jo G Barnett, Michael Gofeld, Ehtesham Baig, Karen Lam, Anne M R Agur, Philip W H Peng
BACKGROUND AND OBJECTIVES: The purpose of this cadaveric study was to determine the pattern of anterior hip capsule innervation and the associated bony landmarks for image-guided radiofrequency denervation. METHODS: Thirteen hemipelvises were dissected to identify innervation of the anterior hip capsule. The femoral (FN), obturator (ON), and accessory obturator (AON) nerves were traced distally, and branches supplying the anterior capsule documented. The relationships of the branches to bony landmarks potentially visible with ultrasound were identified...
February 2018: Regional Anesthesia and Pain Medicine
Robert E Jacobson, Ovidiu Palea, Michelle Granville
Radiofrequency facet ablation (RFA) has been performed using the same technique for over 50 years. Except for variations in electrode size, tip shape, and change in radiofrequency (RF) stimulation parameters, using standard, pulsed, and cooled RF wavelengths, the target points have remained absolutely unchanged from the original work describing RFA for lumbar pain control. Degenerative changes in the facet joint and capsule are the primary location for the majority of lumbar segmental pathology and pain. Multiple studies show that the degenerated facet joint is richly innervated as a result of the inflammatory overgrowth of the synovium...
September 1, 2017: Curēus
David J Polhemus, Rishi K Trivedi, Juan Gao, Zhen Li, Amy L Scarborough, Traci T Goodchild, Kurt J Varner, Huijing Xia, Frank W Smart, Daniel R Kapusta, David J Lefer
BACKGROUND: Sustained sympathetic activation contributes to the progression of myocardial cell injury, cardiac fibrosis, and left ventricular (LV) dysfunction in heart failure (HF). OBJECTIVES: This study investigated the effects of radiofrequency renal nerve denervation (RF-RDN) on the pathobiology of HF and the interaction between the renal sympathetic nerves and natriuretic peptide (NP) metabolism. METHODS: Spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY) were subjected to 45 min of coronary artery ligation and reperfusion for 12 weeks...
October 24, 2017: Journal of the American College of Cardiology
Y N Efimova, A V Lichikaki, B Y Lishmanov
PURPOSE: To study the effect of radiofrequency ablation of renal arteries on regional cerebral blood flow and cognitive function in patients with resistant arterial hypertension (AH). MATERIAL AND METHODS: Transcatheter renal denervation (TRD) was performed in 17 patients with resistant AH. Examination before and after TRD included SPECT with mTc-HMPAO, 24-hours blood pressure (BP) monitoring, and comprehensive neuropsychological testing. Fifteen patients without angiographic signs of carotid atherosclerosis, coronary artery disease and AH, neurological and psychiatric disorders were investigated as control group...
July 2017: Kardiologiia
David L Cedeno, Alejandro Vallejo, Courtney A Kelley, Dana M Tilley, Nitesh Kumar
BACKGROUND: Radiofrequency (RF) ablation for denervation has been utilized for decades in chronic pain management. This relies on the proper targeting of the affected nerve which may be obtained by creating an ablation lesion with a shape and volume that optimizes targeting. Various systems designed to improve lesion size are available. These include cooling the active tip (cooled-RF) and protruding the RF electrode outside the active tip (PERF). OBJECTIVES: This study compares lesion volumes of 3 commercially available RF systems: cooled-RF, "V" shaped active cannula and protruding electrode (18 g and 20 g), and monopolar RF (MRF; 16 g, 18 g, and 20 g)...
September 2017: Pain Physician
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"