Damage to the coronary artery is a rare but important complication following radiofrequency catheter ablation. This case report describes the management of circumflex artery occlusion following mitral isthmus ablation in a 62-year-old male. It also provides a brief literature review and discusses the clinical implications of this complication.
INTENDED USE/INDICATIONS FOR USE. The Maestro 4000 Cardiac Ablation System is intended for use with BSC cardiac ablation catheters in cardiac ablation procedures.. Note: Refer to the individual catheter Directions for Use for catheter compatibility to the Maestro 4000 Cardiac Ablation System. It is also important to carefully review the specific indications, contraindications, warnings, precautions and adverse events included with each catheter, prior to use of the catheter with the Maestro 4000 Cardiac Ablation System.. CONTRAINDICATIONS. There are no specific contraindications for use of the Maestro 4000 Cardiac Ablation System itself. However, users should read and understand the specific indications, contraindications, warnings, and precautions included with any cardiac ablation catheter used in conjunction with the System.. Note: The contraindications listed in the catheter Directions For Use also apply to the use of the Maestro 4000 Cardiac Ablation System. Carefully review the specific ...
Successful Anesthetic Management for Surgical Repair of Atrio-Esophageal Fistula Following Radiofrequency Ablation for Atrial Fibrillation. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
TY - JOUR. T1 - Liver abscess after percutaneous radiofrequency ablation for hepatocellular carcinomas. T2 - Frequency and risk factors. AU - Choi, Dongil. AU - Lim, Hyo K.. AU - Kim, Min Ju. AU - Kim, Suk Jung. AU - Kim, Seung Hoon. AU - Lee, Won Jae. AU - Lim, Jae Hoon. AU - Paik, Seung Woon. AU - Yoo, Byung Chul. AU - Choi, Moon Seok. AU - Kim, Seonwoo. PY - 2005/1/1. Y1 - 2005/1/1. N2 - OBJECTIVE. The purpose of this study was to clarify the frequency and risk factors of liver abscess formation after percutaneous radiofrequency ablation in patients with hepatocellular carcinoma. MATERIALS AND METHODS. Over a 4-year period, 603 patients with 831 hepatocellular carcinomas measuring 5 cm or less in maximum diameter who underwent a total of 751 percutaneous radiofrequency ablation procedures were enrolled in this study. We retrospectively reviewed the medical records and analyzed the overall frequency of liver abscess, risk factors for abscess, and clinical features of the patients. The ...
References: Symptomatic improvement after radiofrequency catheter ablation for typical atrial flutter; Heart 2001;86:167-171 Quality-of-Life in Patients With Paroxysmal Atrial Fibrillation After Catheter Ablation: Results of Long-Term Follow-Up; PACE 2003; 26:678-684 Quality of life restored to normal in patients with atrial fibrillation after pulmonary vein ostial Isolation; Am Heart J 2004;148:318-25 Effect of Left Atrial Ablation on the Quality of Life in Patients With Atrial Fibrillation; Circ J 2008; 72: 582-587 Catheter Ablation for Atrial Fibrillation in Congestive Heart Failure; N Engl J Med 2004;351:2373-83. Effects of Radiofrequency Catheter Ablation on Quality of Life in Patients With Atrial Flutter; Am J Cardiol 1999;84:278-283 Radiofrequency Catheter Ablation of Common Atrial Flutter : Significance of Palpitations and Quality-of-Life Evaluation in Patients With Proven Isthmus Block; Circulation 1999;99;534-540 Relationship Between Atrial Fibrillation and Typical Atrial Flutter in ...
Headline: Bitcoin & Blockchain Searches Exceed Trump! Blockchain Stocks Are Next!. The Ablation Technologies Market report covers detailed competitive outlook including the market share and company profiles of the key participants operating in the global market.. Worldwide Ablation Technologies Market 2022, presents critical information and factual data about the Ablation Technologies Market globally, providing an overall statistical study of the Ablation Technologies Market on the basis of market drivers, Ablation Technologies Market limitations, and its future prospects. The prevalent global Ablation Technologies trends and opportunities are also taken into consideration in Ablation Technologies Market study.. Global Ablation Technologies Market 2022 report has Forecasted Compound Annual Growth Rate (CAGR) in % value for particular period for Ablation Technologies Market, that will help user to take decision based on futuristic chart. Report also includes key players in global Ablation ...
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OBJECTIVE: To evaluate the indications, results and complications of radiofrequency catheter ablation in small infants with supraventricular tachycardia due to an accessory atrioventricular pathway. METHODS: Five infants less than 9 months old underwent radiofrequency catheter ablation of accessory pathways. Ablation was done for medically refractory tachyarrhythmia associated with aborted sudden death in two patients, left ventricular dysfunction in one, failure of antiarrhythmic drugs in one, and planned cardiac surgery in one. All five patients underwent a single successful procedure. Three left free wall pathways were ablated by transseptal approach, a right posteroseptal pathway was ablated from the inferior vena cava, and a left posteroseptal pathway was approached from the inferior vena cava into the coronary sinus. A deflectable 5F bipolar electrode catheter with a 3 mm tip was used. RESULTS: A sudden increment in impedance indicative of coagulum formation was observed in two procedures. ...
This report describes successful radiofrequency ablation of an accessory pathway in a situation with no identifiable AV valve ring. Mapping and ablation of accessory pathways are performed where they cross the fibrous AV valve ring, which provides purchase for the catheter and lessens the degree of myocardial injury. Precise localisation of a well defined AV ring may be a problem in patients with Ebsteins disease4 and possibly in patients with an unguarded tricuspid orifice.. Pulmonary atresia, intact ventricular septum with complete absence of tricuspid valve tissue, is an extremely rare lesion that was first described in a pathological specimen by Klein in 1938.7Anderson et al differentiates a true unguarded orifice from the much more common Ebsteins anomaly on the basis of presence or absence of the mural leaflet of the tricuspid valve.6The three necropsy cases they described all had a dilated right ventricle. Using echocardiography and angiography, further cases have been described usually ...
Mitral isthmus ablation forms part of the electrophysiologists armoury in the catheter ablation treatment of atrial fibrillation. It is well recognised however, that mitral isthmus ablation is technically challenging and incomplete ablation may be pro-arrhythmic, leading some to question its role. This article first reviews the evidence for the use of adjunctive mitral isthmus ablation and its association with the development of macroreentrant perimitral flutter. It then describes the practical techniques of mitral isthmus ablation, with particular emphasis on the assessment of bi-directional mitral isthmus block. The anatomy of the mitral isthmus is also discussed in order to understand the possible obstacles to successful ablation. Finally, novel techniques which may facilitate mitral isthmus ablation are reviewed.
Mitral isthmus is often targeted as a part of stepwise approach during radiofrequency ablation for persistent atrial ablation. Acute success rate in achieving the mitral isthmus block is only modest, late reconduction rate is relatively high and, consequently, incomplete lesion may be proarrhythmic. We describe the first-in-man experience with successful MI ablation by bipolar RF energy delivery. A 64-year-old caucasian man after two previous ablation procedures for drug resistant atrial fibrillation in recent four years, which included pulmonary vein isolation and linear left atrial lesions, was referred for the treatment of recurrent perimitral flutter. Despite the third attempt to create bidirectional block at the mitral isthmus region, we were not even able to stop the arrhythmia by aggressive unipolar radiofrequency ablation both from the left atrium and coronary sinus, because of deeply embedded slow conducting channel probably around the vein of Marshall. Arrhythmia was finally terminated and the
Background- Segmental ostial catheter ablation (SOCA) to isolate the pulmonary veins (PVs) and left atrial catheter ablation (LACA) to encircle the PVs both may eliminate paroxysmal atrial fibrillation (PAF). The relative efficacy of these 2 techniques has not been directly compared.. Methods and Results- Of 80 consecutive patients with symptomatic PAF (age, 52±10 years), 40 patients underwent PV isolation by SOCA and 40 patients underwent LACA to encircle the PVs. During SOCA, ostial PV potentials recorded with a ring catheter were targeted. LACA was performed by encircling the left- and right-sided PVs 1 to 2 cm from the ostia and was guided by an electroanatomic mapping system; ablation lines also were created in the mitral isthmus and posterior left atrium. The mean procedure and fluoroscopy times were 156±45 and 50±17 minutes for SOCA and 149±33 and 39±12 minutes for LACA, respectively. At 6 months, 67% of patients who underwent SOCA and 88% of patients who underwent LACA were free of ...
This is a multi-center, observational, 1-year prospective cohort study (1 year follow-up, at 3, 6 and 12 month) with approximately 675 participants. We will conduct a thorough outcomes assessment utilizing data from Magnetic Resonance Imaging (MRI) scans, as well as pre-procedure and follow-up data. Scans will be blinded to location of participating site. MRI scans will be sequenced and analyzed as they arrive from the database.. Imaging Protocol: All patients will undergo a Delayed-Enhancement MRI (DE-MRI) within 30 days prior to the atrial fibrillation (AF) ablation procedure. The purpose of the initial MRI is to quantify the degree of atrial structural remodeling or fibrosis pre-ablation. Following ablation, DE-MRI will be obtained at 3, 6, and 12 months follow-up to detect and quantify ablation-related scar formation.. Clinical Follow-up: The institution where the ablation was performed will continue post-procedural care following standard of care procedures.. Atrial arrhythmia recurrences ...
TY - JOUR. T1 - Effect of radiofrequency ablation on atrial mechanical function in patients with atrial flutter. AU - Welch, Patrick J.. AU - Afridi, Imran. AU - Joglar, Jose A.. AU - Sheehan, Clifford J.. AU - Zagrodzky, Jason D.. AU - Abraham, Theodore P.. AU - Page, Richard L.. AU - Hamdan, Mohamed H.. PY - 1999/8/15. Y1 - 1999/8/15. N2 - Atrial stunning, as assessed by left atrial appendage emptying and increased spontaneous echo contrast, is known to occur following direct- current cardioversion of atrial fibrillation (AF) and atrial flutter (AFI). Little is known on atrial mechanical function and the time course of atrial recovery following radiofrequency ablation of AFI. Fourteen patients undergoing radiofrequency ablation of persistent typical counterclockwise AFI were enrolled. Two-dimensional and pulse Doppler transesophageal echocardiography (TEE) were performed before ablation and immediately following restoration of sinus rhythm. Left atrial spontaneous echo contrast grades, left ...
Evidence-based recommendations on endoscopic bipolar radiofrequency ablation for biliary obstruction caused by bile duct and pancreas cancers..
Abstract:. Ventricular tachycardia (VT) is one of the major causes of sudden cardiac death (SCD). In general, VT could be managed with antiarrhythmic drugs (AADs) therapy, catheter ablation and implantable cardioverter defibrillators (ICD). While the AADs therapy and catheter ablation have been shown to reduce the recurrence of VT, only the ICD therapy is effective in aborting SCD. The recently published VANISH trial reveals that VT catheter ablation significantly decreases the rate of death, VT storm and appropriate ICD shock comparing with an escalation of AADs therapy for ischemic cardiomyopathy (ICM). However, the mapping strategies and feasibility of VT catheter ablation are often limited by the hemodynamically intolerant VT. Substrate modification strategy and percutaneous left ventricular assist device (pLVAD) are often used to overcome the hemodynamic intolerance. So far there are no large-scale randomized clinical trials comparing different mapping strategies in the setting of ...
The global Ablation Technology Market is primarily driven by high incidence of chronic illnesses, such as cancer. Rising cancer cases fuel the need for minimally invasive procedures for diagnostics purposes. Surgical removal of body tissues is carried out by minimally invasive procedures. These procedures employ ablation technologies. Besides being economical, ablation technologies ensure quick recovery and cause lesser damage to body tissues. They also ensure lower risks of infection.. Favorable government initiatives and a rapidly growing geriatric population are factors that positively impact demand. Owing to high success rates in diagnosis of chronic illnesses and minimal risks, developing economies, such as Brazil, India, Russia, and China are gradually adopting ablation technologies. It is anticipated that popularity of minimally invasive procedures and surging per capita expenditure on healthcare may propel the ablation technology market during the forecast period (2012 to 2020).. Browse ...
Radiofrequency ablation is today the most common invasive technique used to treat thyroid pancreas, bone, liver, kidneys, and lung cancer. It is an intricate procedure done by highly experienced Interventional Radiologists. In the US, for instance, the Austin radiofrequency ablation clinic in Texas has been attested. This is due to their high patient survival rates.. What is Radiofrequency Ablation?. If you or your loved one has cancer, then youve probably heard the doctor say that surgeries are, at times, not an option. This usually happens when the patients malignant tumor is at an early stage or is in locations that cant be surgically removable. Other times the patient is unable to afford the cost of surgical resection of the tumor.. Radiofrequency ablation involves the application of a high heat current through the tumor to kill the diseased cells.. How is it done?. Four key stages are followed to ensure a successful radiofrequency ablation.. Preoperative Evaluation. This is the first ...
Atrial fibrillation is the commonest cardiac arrhythmia. While a number of established drug therapies are often successful in achieving satisfactory control, more recently radiofrequency catheter ablation has emerged as an effective therapy for patients with paroxysmal AF. However, the place of catheter ablation remains unclear with limited data comparing ablation with antiarrhythmic drug therapy as first-line treatment in patients.. In the MANTRA-PAF trial 294 patients (mean age 55) with new onset paroxysmal atrial fibrillation and no history of antiarrhythmic drug use were randomly assigned to an initial strategy of either catheter ablation (146 patients) or therapy with class IC or class III antiarrhythmic agents (148 patients). Follow-up was by 7-day Holter-monitoring at 3, 6, 12, 18, and 24 months. The primary end points were the cumulative and per-visit burden of atrial fibrillation (i.e., percentage of time in atrial fibrillation). During follow-up there was no significant difference ...
TY - JOUR. T1 - Elimination of triggers without an additional substrate modification is not sufficient in patients with persistent atrial fibrillation. AU - Park, Junbeom. AU - Pak, Hui Nam. PY - 2015/2/1. Y1 - 2015/2/1. N2 - Atrial fibrillation (AF) is a multifactorial disease with complex pathophysiology. Although restoring sinus rhythm delays the progression of atrial remodeling, non-pharmacologic intervention, such as radiofrequency catheter ablation (RFCA), should be done based on the background pathophysiology of the disease. While circumferential pulmonary vein isolation (CPVI) has been known to be the cornerstone of AF catheter ablation, a clinical recurrence rate after CPVI is high in patients with persistent AF (PeAF). Step-wise linear ablation, complex fractionate atrial electrogram (CFAE)-guided ablation, rotor ablation, ganglionate plexus ablation, and left atrial appendage isolation may improve the ablation success rate after CPVI. But, there are still substantial AF recurrences ...
Objectives: To describe the initial results and early follow-up data after radiofrequency catheter ablation (RFA) of septal hypertrophy in children with hypertrophic obstructive cardiomyopathy (HOCM).. Methods: 11 children (5 female; age range 5-17 years; weight range 17-52 kg) with symptomatic HOCM underwent RFA for septal reduction. After initial left ventricular angiography to delineate the anatomic extent of the obstruction, sequential AV pacing at varying AV delays was performed to determine whether the LVOT gradient could be influenced by pacing techniques. If this was not the case, RFA was performed. The His bundle was plotted and marked using the LocaLisa navigation system (Medtronic, Minneapolis). Using an 8F cooled tip catheter (Sprinklr, Medtronic) with an infusion rate of 300 ml/hour during RFA, ablation was commenced at the most apical extent of the hypertrophied septum. Three lines of contiguous RF lesions were made, extending upto just under the aortic valve. Care was taken to ...
BACKGROUND Even with a low energy setting, radiofrequency energy applications on the left atrial (LA) posterior wall may cause excessive transmural injury (ETI) during catheter ablation of atrial fibrillation (AF). OBJECTIVE The purpose of this study was to clarify the prevalence and characteristics of ETI. METHODS This study included 104 patients with AF who underwent extensive encircling pulmonary vein isolation (EEPVI) followed by an endoscopic examination (≤48 hours after EEPVI). EEPVI was performed under conscious sedation, and the ablation settings at the LA posterior wall were a maximum energy of 20 to 25 W and duration of ≤30 seconds. The ETI was defined as any injury that resulted from EEPVI, including esophageal damage or periesophageal nerve injury. RESULTS ETIs were found in 10 (9.6%) patients and were all asymptomatic; esophageal damage in 4 patients and periesophageal nerve injury in the remaining 6. All patients with ETI were below normal weight (body mass index [BMI] | 24.9 kg
The need for this trial arises out of 1) the rapidly increasing number of pts , 60 years of age with AF accompanied by symptoms and morbidity, 2) the failure of anti-arrhythmic drug therapy to maintain sinus rhythm and reduce mortality, 3) the rapidly increasing application of radio-frequency catheter ablation without appropriate evidence-based validation, and 4) the expanding impact of AF on health care costs.. This study will randomize up to 2200 patients to a strategy of catheter ablation versus pharmacologic therapy with rate or rhythm control drugs. Each pt will have 1) characteristics similar to AFFIRM pts (≥65 yo or ,65 with ,1 risk factor for stroke, 2) Documented AF warranting treatment, and 3) Eligibility for both catheter ablation and ≥2 anti-arrhythmic or ≥2 rate control drugs. Pts will be followed every 6 months for an average of approximately 5 years and will undergo repeat trans-telephonic monitor, Holter monitor, and CT/MR studies to assess the impact of treatment.. The ...
To the Editor:. Catheter ablation is an important treatment for recurrent, symptomatic atrial fibrillation (AF). The original procedure targeted focal triggers of AF arising from within the pulmonary veins (PVs). This technique generated minimal left atrial (LA) scar but was complicated by the development of PV stenosis (1). Pulmonary vein antral isolation (PVAI) creates circular ablation lines within the left atrium, minimizing the risk for PV stenosis, and has become the preferred procedure for paroxysmal AF ablation. However, when PVAI is combined with adjunctive ablation, as much as 40% of the LA myocardium may be replaced by scar during a single catheter ablation (2), raising a concern that the procedure may adversely affect the ability of the left atrium to act as a contractile chamber (transport function) and/or compliance chamber (reservoir function). Although prior studies have examined the effect of AF ablation (3) and scar (4) on LA contractility, the effect on LA compliance has ...
RF has been successful in destroying tumors in patients with HCC. It has many advantages compared with other methods of thermal ablation. Rossi et al.8 reported that the maximum diameter of coagulation necrosis was 2.5 cm. This was achieved with a single electrode insertion using an RF generator with a frequency of 480 kHz, a maximum output power of 50 W (electrosurgical generator, RITA Medical System), and four expandable needle electrodes. In our study, the greatest long-axis dimension of standard RFA was 26.7 ± 6.4 mm. using an RITA 500PA with a frequency of 460 kHz, a maximum output power of 50 W, and four expandable needle electrodes. A necrotic area of up to 3 cm in dimension produced with a cooled RF single electrode was observed in tumors10 and cluster electrodes achieved a much larger necrotic area.9, 12, 29 However, the limited volume of coagulation necrosis obtained at each activation of the RF system and the sometimes irregular burn shape due to the proximity of large vessels that ...
Between February 1995 to May 2000, 626 consecutive patients underwent radiofrequency catheter ablation for various types of cardiac arrhythmia. The mean age was 41 years, range 1-85 years. Mapping and ablation were guided by intracardiac electrogram and anatomical approaches. The initial success, compliction, recurrent and final success rates are shown below :-WPW AVRT AT AFI AVNRT PVC VT AF Initial success (%) 95 100 83 91 100 89 95 81 Complication (%) 2.1 4.6 7.1 8.8 6.0 7.7 1.4 25 Recurrence (%) 9 4 13 6 1 11 11 6 Final success (%) 93 99 77 88 100 89 91 75 Conclusion, RFCA is an effective treatment and should be considered as first line treatment for certain tachyarrhythmia ...
Ventricular arrhythmias (VAs) arising from the origin above pulmonary valve lack comprehensive investigation. This study aimed to disclose the characteristics and radiofrequency catheter ablation (RFCA) outcomes for those VAs. One hundred six VAs arising from the region above pulmonary valve treated with RFCA were included in this study. Seventy-five cases were identified in the pulmonary sinus cusps (PSCs, 32 in left sinus cusp (PLC), 15 in right (PRC), 28 in anterior (PAC)) and 31 cases were in the main stem of pulmonary artery (MSPA, 18 above PLC (LMSPA), 3 above PRC (RMSPA), 10 above PAC (AMSPA)). Compared with PSCs VAs, MSPA VAs exhibited a higher R wave amplitude in the inferior leads, a total inferior R amplitude | 5.1 mV predicting MSPA origins. LMSPA, RMSPA and AMSPA VAs resembled PLC, PRC and PAC VAs in electrocardiographic characteristics respectively. No electrophysiological differences were found between PSCs and MSPA VAs. The irrigated-up catheter and R0 Swartz long sheath were more
TY - JOUR. T1 - RFA Guardian. T2 - Comprehensive Simulation of Radiofrequency Ablation Treatment of Liver Tumors. AU - Voglreiter, Philip. AU - Mariappan, Panchatcharam. AU - Pollari, Mika. AU - Flanagan, Ronan. AU - Blanco Sequeiros, Roberto. AU - Portugaller, Rupert Horst. AU - Fütterer, Jurgen. AU - Schmalstieg, Dieter. AU - Kolesnik, Marina. AU - Moche, Michael. PY - 2018/12/1. Y1 - 2018/12/1. N2 - The RFA Guardian is a comprehensive application for high-performance patient-specific simulation of radiofrequency ablation of liver tumors. We address a wide range of usage scenarios. These include pre-interventional planning, sampling of the parameter space for uncertainty estimation, treatment evaluation and, in the worst case, failure analysis. The RFA Guardian is the first of its kind that exhibits sufficient performance for simulating treatment outcomes during the intervention. We achieve this by combining a large number of high-performance image processing, biomechanical simulation and ...
Iatrogenic ATs have been reported after either surgical or catheter ablation of AF.7-14 After ablation of paroxysmal AF (wherein the initial ablation procedure is predominantly directed to PV isolation), the mechanism of AT is virtually always focal, originating from reconnected PVs.10 However, ablation of persistent AF typically involves LA, and sometimes RA, "substrate" ablation (linear lesions and ablation of sites of complex fractionated electrograms) beyond simple PV isolation. Here, we report a novel approach to mapping these postablation scar-related ATs by using a combination of activation mapping with a multielectrode array mapping catheter and targeted entrainment mapping.. The mechanisms of postablation ATs depend to a large extent on the ablation performed in the index procedure. A segmental approach to PV isolation, confirmed with a circular mapping catheter, resulted in most postablation ATs being of a focal mechanism from reconnected PV ostia.10,12 Anatomic approaches have been ...
This analysis confirms that noninducibility of any VT after catheter ablation for patients with prior MI is significantly associated with a decreased risk of the primary outcome of a composite endpoint of death, appropriate shock, or VT storm after 30 days in addition to the secondary outcome of a composite of appropriate ICD shock at any time, VT storm at any time, and sustained VT below the ICD detection limit. Although the VANISH design allowed a procedural endpoint if only VT ,300 ms was inducible, our analysis suggests that even these faster VTs may predict worse outcomes. These results are particularly important given that the VANISH trial was a randomized controlled trial with standardized ICD programming and AAD use.. Although we clearly found that patients rendered noninducible with VT ablation had a better prognosis, we were unable to identify any baseline clinical characteristics that were predictive of noninducibility in this patient population. Other studies have demonstrated the ...
Pulmonary thromboembolism (PTE) is a fatal condition that may rarely occur due to complications of coronary catheter insertion. In this case report, a 41-year-old male was presented 48 hours after radiofrequency catheter ablation(RFCA) for the management of Wolf-Parkinson-White syndromewith acute onset of dyspnea, hemoptysis, and chest pain. The physical examination revealed coarse crackles in the base of left hemithorax and laboratory tests were normal. The patient was suspicious for PTE based on clinical symptoms and the history ofRFCA. Diagnosis was confirmed by computed tomography angiography of lungs. Patient symptoms improved after 3 months of treatment with warfarin
Ablation refers to minimally invasive procedures which entail the surgical excision of body tissues. Ablation procedures are gaining rapid popularity across the globe on account of the fact that they are used in minimally invasive ablation procedures. Lower risk of damage to tissues, lower risk of infection, quick recovery and cost effectiveness of ablation are some of the major drivers of this market.. Full research report on Ablation Technology Market Analysis: http://www.grandviewresearch.com/industry-analysis/ablation-devices-industry. Growing base of geriatric population across the world clubbed with rising incidence rates of target conditions such as cancer and urological diseases will serve the global Ablation Technology market as high impact rendering drivers. Growing adoption of ablation procedures in emerging economies such as India, China, Russia and Brazil owing to the presence of high unmet medical needs and rising per capita healthcare expenditure in these countries, will fuel the ...
PurposeThe purpose of this study was to evaluate need for antibiotic prophylaxis for radiofrequency ablation (RFA) of liver tumors in patients with no significant co-existing risk factors for infection.Materials and MethodsFrom January 2004 to September 2013, 83 patients underwent 123 percutaneous RFA procedures for total of 152 hepatocellular carcinoma (HCC) lesions. None of the patients had pre-existing biliary enteric anastomosis (BEA) or any biliary tract abnormality predisposing to ascending biliary infection or uncontrolled diabetes mellitus. No pre- or post-procedure antibiotic prophylaxis was provided for 121 procedures. Data for potential risk factors were reviewed retrospectively and analyzed for the frequency of infectious complications, including abscess formation.ResultsOne patient (1/121 (0.8 %) RFA sessions) developed a large segment 5 liver abscess/infected biloma communicating with the gallbladder 7 weeks after the procedure, successfully treated over 10 weeks with IV and PO ...
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Radio-frequency ablation (RFA) is used to locally disrupt electrical propagation in myocardium and treat arrhythmias, and direct visualization of ablation
Kumar N, Gaba RC, Knuttinen MG, Omene BO, Martinez BK, Owens CA, et al. Tract seeding following radiofrequency ablation for hepatocellular carcinoma: prevention, detection, and management. Semin Interv Radiol. 2011;28(2):187-92.CrossRefGoogle Scholar ...
During radiofrequency ablation, Dr. Lee will first make a very small incision to create room for a slender catheter. The catheter serves as a delivery tool for concentrated heat (the radiofrequency energy,) which is sent directly into the vein walls. This heat forces the vein to compress. The blood inside the vein will then gradually be redirected into healthy veins below. The vein, which will then be just a shell, will gradually be absorbed by the body and replaced with scar tissue. This leaves the surface of the skin smooth and clear. The radiofrequency ablation treatment process usually takes less than an hour, but it depends on how many veins are being treated during the session. Radiofrequency ablation is quite well tolerated and most patients need only local anesthesia or mild sedation for the procedure.. ...
Aims Early identification of patients who could benefit from early re-intervention after catheter ablation is highly warranted. Our aim was to investigate the association between post-procedural burden of supraventricular ectopic complexes (SVEC) and the risk of long-term atrial fibrillation (AF) recurrence. Methods and results A total of 125 patients undergoing catheter ablation for AF were included. Patients underwent 7-day Holter recordings immediately post-procedural. The number of SVEC in post-procedural Holter recordings was categorized into quartiles: 0-72, 73-212, 213-782 and amp;gt;= 783 SVEC/day. Long-term AF recurrence was defined as a combined endpoint of AF amp;gt;= 1 min during follow-up Holter recordings, cardioversion or hospitalization for AF after a 3-month blanking period and within 24 months of follow-up. High post-procedural supraventricular ectopy burden was associated with an increased risk of long-term AF recurrence in a dose-dependent manner (amp;gt;= 783 SVEC: HR 4.6 ...
Sonacare Medical. The report studies the industry for Tumor Ablation across the globe taking the existing industry chain, the import and export statistics in Tumor Ablation market & dynamics of demand and supply of Tumor Ablation into consideration. The Tumor Ablation research study covers each and every aspect of the Tumor Ablation market globally, which starts from the definition of the Tumor Ablation industry and develops towards Tumor Ablation market segmentations. Further, every segment of the Tumor Ablation market is classified and analyzed on the basis of product types, application, and the end-use industries of the Tumor Ablation market. The geographical segmentation of the Tumor Ablation industry has also been covered at length in this report.. The competitive landscape of the worldwide market for Tumor Ablation is determined by evaluating the various industry participants, production capacity, Tumor Ablation markets production chain, and the revenue generated by each manufacturer in ...
Biosense Webster, a subsidiary of Johnson & Johnson, accounted for the majority of the cardiac ablation market with its line of irrigated RF ablation catheters. Biosense offers the CELSIUS, EZ Steer®, Navistar® and ThermoCool® ablation catheter product lines. Biosense Webster is also a major supplier of diagnostic electrophysiology catheters that are often used in conjunction with ablation catheters. The company is expected to increase their market share as these devices gain popularity.. Medtronic competes in the cardiac ablation market primarily with its ENHANCR® II and RF Conductr® ablation catheter product lines. Medtronic also acquired CryoCath Technologies Inc. in 2008 for $380 million and Ablation Frontiers LLC for $225 million in 2009 to gain market share advantage in the potentially lucrative cryoablation market. Cryoablation catheters have a significantly higher ASP than RF catheters. Medtronic also acquired ATS Medical for $350 million in 2010, further strengthening Medtronics ...
A study published in February reported that patients who took Pradaxa (dabigatran) following radiofrequency ablation to treat atrial fibrillation experienced more bleeding and blood clots compared to people who were treated with warfarin post-procedure. The authors of the study, published in the Journal of the American College of Cardiology, noted that the lack of antidote to reverse life-threatening Pradaxa bleeding side effects "makes the risk of excessive bleeding complications all the more important.". The study looked at 290 patients who had undergone atrial fibrillation ablation procedures performed at eight high-volume hospitals from January 2010 to July 2011. Roughly half were treated with 150 mg of Pradaxa twice daily for at least 30 days before AF ablation. Pradaxa was withheld on the day of surgery and restarted 3 hours after ablation. The remaining patients were assigned uninterrupted periprocedural warfarin.. Overall, 2.1% of patients assigned Pradaxa experienced thromboembolic ...
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia encountered in clinical practice. Radiofrequency catheter ablation (CA) is increasingly employed to treat this disease, yet the selection of persistent AF patients who will benefit from this treatment remains a challenging task. Several parameters of the surface electrocardiogram (ECG) have been analyzed in previous works to predict AF termination by CA, such as fibrillatory wave (f-wave) amplitude. However, they are usually manually computed and only a subset of electrodes is inspected. In this study, a novel perspective of the role of f-wave amplitude as a potential noninvasive predictor of CA outcome is adopted by exploring ECG interlead spatial variability. An automatic procedure for atrial amplitude computation based on cubic Hermite interpolation is first proposed. To describe the global f-wave peakto-peak amplitude distribution, signal contributions from multiple leads are then combined by condensing the most
The purpose of this EP Wire is to survey clinical practice in this rapidly evolving field as the variety of surgical techniques and the heterogeneity of treated patients make the comparison of results and outcomes challenging. Twenty-four European centres, all members of the EHRA EP research network, responded to this survey and completed the questions. Of the participating centres, 11 (46) performed (irrespective of the technique) stand-alone surgical atrial fibrillation (AF) ablation in 2011. Seven hospitals (64) performed totally thoracoscopic AF ablation procedures off-pump (in 20100 of their cases). The most commonly used lesion set was only pulmonary vein isolation in five hospitals (46). Eight centres (73) performed validation of the surgical lesion set at the time of intervention. The most important indication for performing stand-alone, totally thoracoscopic surgical AF ablation in seven participating hospitals was failed catheter ablation. According to their definition of success, ...
Percutaneous catheter ablation is a key treatment modality in the contemporary management of ventricular arrhythmias (VA). Ablation reduces the burden of implanted cardioverter-defibrillator shocks,1 which are otherwise associated with poor quality of life and increased mortality.2 Ablation can be life saving for incessant or repeated VA electrical storm (ES).3 However, acute and long-term efficacy remain suboptimal. Acute procedural success is achievable in 56% to 77% of patients with ventricular tachycardia (VT) related to ischemic cardiomyopathy and 38% to 67% of patients with nonischemic cardiomyopathy (NICM), whereas 30% to 50% of patients recur during long-term follow-up.4-6 Exhaustive efforts using endocardial and epicardial ablation at times fail to abolish VA. Such patients suffer a poor prognosis from uncontrollable arrhythmia, progressive heart failure, and high mortality.1 As the utilization of VT ablation continues to increase over time, the complexity of patients being referred for ...
In clinical radiology, there are numerous examples of new techniques that were initially enthusiastically promoted and then subsequently abandoned when early promise was not realized in routine patient care. Appropriateness of new or established interventional radiology techniques to specific clinical conditions must be determined from clinical experience, from communication with experts in the field and/or careful review of available medical literature, and on an individual patient basis by means of review of clinical notes and diagnostic imaging studies. For patients with liver neoplasms, regional techniques such as radiofrequency ablation (RFA) have been developed and are now the subject of ongoing research. This article describes the utilization of Evidence-Based Practice (EBP) techniques as a means of deciding the appropriateness of percutaneous RFA in treating colorectal liver metastases (CLM ...
Figure 9. Activation maps for 1 of the capture episodes obtained after lesion induction. The recording obtained with 1 of the electrodes indicates the time corresponding to each of the maps. The color coding indicates local activation times and isochrones. The stimulating electrode is positioned in the central area of the multiple electrode, located on the left ventricular anterior wall.. Discussion The main results of this study are as follows: a) the induction of a lesion in the LV free wall increases the heterogeneity of myocardial activation during VF and modifies the arrival of fronts in adjacent regions; b) stimulation during VF using trains of high-frequency stimuli causes occasional captures during at least 3 consecutive stimuli, and c) lesion elongation slightly increases consecutive captures when using cycles slightly longer than those of the arrhythmia.. Modification of Myocardial Activation During Ventricular Fibrillation Caused by the Lesion Radiofrequency catheter ablation is a ...
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Radiofrequency ablation (RFA) is a procedure that destroys tumor cells by heating them using a needle electrode and high-frequency electrical currents. Ultrasound or CT imaging may be used to help the radiologist guide the needle into the tumor.. Over the last few years, developments in tumor ablation have allowed large volume tissue ablation to be performed safely on selected patients. While other minimally invasive methods of tumor ablation have been used, at this point in time, RFA has been the most commonly used method.. When should I consider RFA?. Radiofrequency ablation can be a viable and effective treatment option for patients who wish to avoid conventional surgery or are too ill to undergo surgery. RFA can be an appropriate treatment for cancer of the liver, kidney, lung, and bones, depending on the specifics of each case. RFA may also be used to reduce the size of a tumor so that it can be more easily eliminated by conventional treatment (chemotherapy or radiation) or to provide ...
Introduction. Multiple important advances in ablation have taken place over the past year. Seminal articles in the ablation of atrial fibrillation (AF) and ventricular tachycardia (VT) were published.. Atrial Fibrillation. The multicenter FIRE AND ICE (Comparative Study of Two Ablation Procedures in Patients With Atrial Fibrillation) trial randomized 769 patients with paroxysmal AF to cryoballoon or radiofrequency ablation. This landmark trial showed that cryoballoon ablation was non-inferior to radiofrequency ablation in terms of the primary efficacy endpoint. In addition, safety analysis showed that both procedures have similar safety profiles.1 The randomized AATAC (Ablation vs Amiodarone for Treatment of AFib in Patients With CHF and an ICD) trial, which included 203 patients with persistent AF, NYHA class II to III heart failure with reduced ejection fraction and an implantable cardioverter defibrillator, showed that catheter ablation is superior to amiodarone in preventing AF recurrence.2 ...
Guides you through the decision to have catheter ablation for the heart rhythm problem atrial fibrillation. Lists benefits and risks of catheter ablation and medical therapy. Includes interactive tool to help you make your decision.
PurposeThe aim of the present study was to investigate the technical feasibility of flat-panel cone-beam CT (CBCT)-guided radiofrequency ablation (RFA) of very small (,1.5 cm) liver tumors.Materials and MethodsPatients included were candidates for hepatic percutaneous RFA as they had single biopsy-proven hepatic tumors sized ≤1.5 cm and poorly defined on ultrasonography. Following apnea induction, unenhanced CBCT scans were acquired and used to deploy the RF electrode with the aid of a virtual navigation system. If the tumor was not clearly identified on the unenhanced CBCT scan, a right retrograde arterial femoral access was established to carry out hepatic angiography and localize the tumor. Patients lesions and procedural variables were recorded and analyzed.ResultsThree patients (2 male and 1 female), aged 68, 76, and 87 years were included; 3 lesions (2 hepato-cellular carcinoma and 1 metastasis from colorectal cancer) were treated. One patient required hepatic angiography. Cycles of ...
PURPOSE: The aim of this study was to evaluate the literature for articles assessing radiofrequency ablation (RFA) for pulmonary malignancy. MATERIALS AND METHODS: The bottom-up approach to evidence-based practice was applied by 2 reviewers to the retrieval and appraisal of original research articles published on pulmonary RFA between 2002 and 2009. Primary lung cancer and pulmonary metastases data were analyzed separately. The relationship between the percentage of local recurrence rate and lesion size, patient age, follow-up duration, and time to local recurrence was assessed using Spearmans rank correlation. Discrete time series were used to evaluate time trends. RESULTS: Secondary evidence yielded 1 review of 26 observational studies. Primary evidence yielded 46 studies that seemed suitable for detailed appraisal. A total of 2905 ablations were performed in 1584 patients. Eight studies evaluated primary lung cancers alone, 11 evaluated pulmonary metastases alone, 25 evaluated both, and 2 ...
The endovenous radio frequency ablation (or VNUS Closure) procedure is a minimally-invasive vein treatment. It uses a patented radiofrequency catheter inserted into the vein, which applies RF energy to heat the vein. This causes the vein to collapse and seal shut. The VNUS Closure procedure has been FDA-approved since 1999 and over 250,000 procedures have been performed worldwide.
The endovenous radio frequency ablation (or VNUS Closure) procedure is a minimally-invasive vein treatment. It uses a patented radiofrequency catheter inserted into the vein, which applies RF energy to heat the vein. This causes the vein to collapse and seal shut. The VNUS Closure procedure has been FDA-approved since 1999 and over 250,000 procedures have been performed worldwide.
Baseline characteristics of the patients in this study were generally comparable to those in the pre-approval THERMOCOOL VT ablation trial, including use of amiodarone (68.3% vs. 70%, respectively) (9); however, some differences are notable. Whereas a majority of the patients in the present study had coronary artery disease (95.4%) and MI (85.4%), only patients with previous MI (100%) were enrolled in the previous study. Also, more patients in the current study had hypertension, coronary angioplasty, and history of atrial fibrillation, as well as slightly higher mean LVEF (30% vs. 25%). Whereas baseline patient characteristics differed somewhat, both studies had almost identical study designs and ablation strategies. Of note, the all-cause mortality rate of 13.4% at 12 months post-ablation in the present study was better than in the previous study, where 1-year mortality was 18%. The improved mortality may be linked to patient selection with a better EF and lower prior MI rate in the current ...
Background A remote magnetic navigation (MN) system is available for radiofrequency ablation of atrial fibrillation (AF), challenging the conventional manual ablation technique. The myocardial markers were measured to compare the effects of the two types of MN catheters with those of a manual-irrigated catheter in AF ablation. Methods AF patients underwent an ablation procedure using either a conventional manual-irrigated catheter (CIR, n=65) or an MN system utilizing either an irrigated (RMI, n=23) or non-irrigated catheter (RMN, n=26). Levels of troponin T (TnT) and the cardiac isoform of creatin kinase (CKMB) were measured before and after ablation. Results Mean procedure times and total ablation times were longer employing the remote magnetic system. In all groups, there were pronounced increases in markers of myocardial injury after ablation, demonstrating a significant correlation between total ablation time and post-ablation levels of TnT and CKMB (CIR r=0.61 and 0.53, p,0.001; RMI r=0.74 ...
Atrial fibrillation catheter ablation energy sources radiofrequency, cryothermy, and laser energy and catheter types, including balloon catheters.
Radiofrequency ablation (RFA) is a medical procedure in which part of the electrical conduction system of the heart, tumor or other dysfunctional tissue is ablated using the heat generated from medium frequency alternating current (in the range of 350-500 kHz). RFA is generally conducted in the outpatient setting, using either local anesthetics or conscious sedation anesthesia. When it is delivered via catheter, it is called radiofrequency catheter ablation. Two important advantages of radio frequency current (over previously used low frequency AC or pulses of DC) are that it does not directly stimulate nerves or heart muscle and therefore can often be used without the need for general anesthetic, and that it is very specific for treating the desired tissue without significant collateral damage.[citation needed] Documented benefits have led to RFA becoming widely used during the 21st century. RFA procedures are performed under image guidance (such as X-ray screening, CT scan or ultrasound) by an ...
SEE PAGE 14 D urable isolation following pulmonary vein (PV) ablation may not be necessary for effective suppression of atrial fibrillation (AF) in certain patients with AF. However, most patients are thought to benefit from durable PV isolation, because PV reconnection seems to by and large underlie the mechanism of AF following catheter ablation (1). A recent study found that among patients undergoing $3 radiofrequency (RF) catheter ablations for AF, presence of durable isolation in all PVs was only noted in w8% (2). It has been shown that in most cases, PV conduction recovery occurs rapidly, with as many as one-third of targeted PVs and four-fifths of those that recover electrical conduction reconnecting in as little as 30 min (3). Moreover, there still remains the possibility that conduction block may be observed despite presence of a conduction gap. Ranjan et al. (4) created a 2-dimensional model of the cardiac syncytium simulating RF ablation lines with gaps of varying lengths, conductivity, and
A catheter ablation procedure, with ablation catheters from Medtronic, is a minimally invasive procedure to treat atrial fibrillation.
New life-saving treatments for Arrythmia in clinical trial on The Use of Remote Magnetic Navigation in Catheter Ablation of Heart Arrythmia
In the in vitro study, the mean temperature at the front and ventral wall of the spinal canal was 50.8 °C and 43.6°C, respectively at 20 mm significantly greater than 37.7 °C and 33.7±1.7 °C, respectively, at 10 mm ablation depth. The coagulative necrosis area was significantly (P,0.0001) greater at 20 mm depth than at 10 mm depth (mean 17.0×20.7 mm2 vs. 14.2×16.6mm2). In the in vivo experiment, the local temperature increased significantly (P,0.05) from around 36 °C before ablation to over 41 °C at 20 minutes after ablation, with the temperature at the electrode tip (90.4°C) and withint the vertebral body (67.0°C) significantly (P,0.05) greater than at the posterior (41.9°C) and lateral wall (41.8°C). Immediately and one week after RFA, coagulative necrosis was present in the ablation site. From 2 to 5 weeks, bone remodeling began with proliferatin of granulation, fibrous tissues, callus, and normal bone trabecula. Clinically, all four patients had successful RFA and ...
Learn about radiofrequency ablation therapy for kidney tumor. Radiofrequency ablation, sometimes referred to as RFA, is a minimally invasive treatment for cancer.
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The purpose of the study is to evaluate the effectiveness of radiofrequency ablation by pathological correlation and to characterize the tissue response
CHICAGO - The largest-ever randomized trial of catheter ablation for atrial fibrillation ended in a draw, but there may be a clear winner for some patients.
Clinical assessment of computed tomography guided radiofrequency ablation in the treatment of inoperable patients with pulmonary tumors
Hoyt et al identified risk factors for complications following atrial fibrillation. These can help to identify a patient who may benefit from alternative therapy or referral to an expert. The authors are from the Johns Hopkins University.
Targeted radiofrequency ablation (also written t-RFA) is a minimally invasive procedure to treat severe pain and discomfort caused from metastatic tumors in the vertebral body of the spine. This procedure uses radiofrequency energy to target and ablate a specific spinal tumor, causing it shrink and reduce the pressure on the surrounding nerves and tissues. The procedure minimizes damage to the vertebrae and surrounding tissues. It is used as a palliative therapy rather with the intention of treating the cancer itself. Targeted radiofrequency ablation was first developed by DFINE, Inc., a medical device company based in San Jose, California.[citation needed] Its product, the STAR Tumor Ablation System received 510(k) clearance from the United States Food and Drug Administration in August 2010.[citation needed] It is cleared for sale in the US and CE marked in Europe. The procedure was first performed at the James Graham Brown Cancer Center located at the University of Louisville Hospital in March ...
OBJECTIVES: The HISTORIC-AF trial is a prospective, multicentre, single-arm study designed to evaluate the outcomes of a staged endoscopic and transcatheter ablation in patients with stand-alone, persistent or long-standing persistent atrial fibrillation (AF). METHODS: From 2012 to 2015, 100 consecutive patients were enrolled and underwent thoracoscopic left atrial epicardial isolation (box lesion) followed by transcatheter ablation in case of AF recurrency. The safety end point was the composite outcome of freedom from major adverse events at 30-days, while efficacy end points were: (i) primary: freedom from AF and stable sinus rhythm following isolated thoracospic ablation ,60% and (ii) secondary: freedom from AF and stable sinus rhythm ,80% following hybrid ablation (as per HRS criteria ...
Ventricular radio-frequency ablation (RFA) can have a critical impact on preventing sudden cardiac arrest but is challenging due to a highly complex arrhythmogenic substrate. This work aims to identify local image characteristics capable of predicting the presence of local abnormal ventricular activities (LAVA). This can allow, pre-operatively and non-invasively, to improve and accelerate the procedure. To achieve this, intensity and texture-based local image features are computed and random forests are used for classification. However using machine-learning approaches on such complex multimodal data can prove difficult due to the inherent errors in the training set. In this manuscript we present a detailed analysis of these error sources due in particular to catheter motion and the data fusion process. We derived a principled analysis of confidence impact on classification. Moreover, we demonstrate how formal integration of these uncertainties in the training process improves the algorithms
Catheter ablation complex or fractionated atrial electrograms (CFAE) may improve outcomes for persistent AF. However, it is unclear whether CFAE are important in maintaining AF or whether targeting of CFAE can be refined based on electrogram morphology or knowledge of the remodelling process. A detailed classification of CFAE was described. Assessment of 100 CFAE by visual inspection in real time correlated well with detailed offline measurement. Targeting of different CFAE morphologies in 20 patients with persistent AF caused cycle length prolongation only with ablation of certain CFAE morphologies. Therefore, targeting CFAE is not simply atrial de-bulking, certain CFAE morphologies are more important for maintaining AF. A computer model was established to simulate LA wall stress using a 3D reconstruction of the chamber from CT imaging. Electrophysiologic data was acquired in 19 patients in persistent AF and compared to simulated wall stress data. Peaks in wall stress were associated with areas ...
TY - JOUR. T1 - Novel methods for renal tissue ablation. AU - Olweny, Ephrem O.. AU - Cadeddu, Jeffrey A. PY - 2012/9/1. Y1 - 2012/9/1. N2 - PURPOSE OF REVIEW: To provide an overview of the current research on renal tissue ablation, highlighting novel ablation techniques and technologies. RECENT FINDINGS: As long-term data on renal radio frequency ablation (RFA) and cryoablation confirming their oncologic efficacy emerge, ongoing research aims at improving the treatment profiles of these techniques as well as developing novel methods for renal tissue ablation. SUMMARY: Although nephron-sparing surgery is the gold standard treatment for small renal masses confirmed malignant, ablative therapies are an option in elderly patients, who may be poor surgical candidates. RFA and cryoablation have each been used for renal tissue ablation for over a decade but their efficacy in ablation of central lesions or lesions more than 3cm in size is limited. Increasing ablation size and improving efficiency of ...
A cell necrosis apparatus includes an introducer with a tissue piercing distal end. An RF electrode device includes a first RF electrode with a tissue piercing distal end, a second RF electrode with a tissue piercing distal end, and a third RF electrode with a tissue piercing distal end. The first and second electrodes each have an exterior non-insulated energy delivery surface and an exterior opposing insulated surface. The first, second and third RF electrodes are deployable from the introducer with the first and second RF electrodes exterior non-insulated energy delivery surfaces facing and surrounding the third RF electrode.
Regardless of the patients baseline thromboembolic risk, OAC therapy is indicated to prevent thromboembolism during, and shortly after, catheter ablation procedure for AF due to the increased periprocedural risk of stroke or TIA.1 The long-term continuation of OAC following the procedure is less evidence-based, and is currently tailored according to the patients thromboembolic and bleeding risks.1,4 Other factors might be weighed in this decision making: on the one hand, the long-term risk of stroke after AF ablation, as shown by this trial and others,5 is low; on the other hand, AF recurrence after ablation is more likely to be asymptomatic and can recur late after the procedure.6. The key finding of this study is that the continuation of OAC therapy beyond three months post-RFA did not significantly reduce thromboembolic risk, even in patients with higher CHA2DS2-VASc scores. However, OAC treatment was associated with an increased risk of serious bleeding, suggesting that in these patients, ...
The (Catheter Ablation Versus Anti-arrhythmic Drug Therapy for Atrial Fibrillation Trial) CABANA Trial has the overall goal of establishing the appropriate roles for medical and ablative intervention for atrial fibrillation (AF). The CABANA Trial is designed to test the hypothesis that the treatment strategy of left atrial catheter ablation for the purpose of eliminating atrial fibrillation (AF) will be superior to current state-of-the-art therapy with either rate control or rhythm control drugs for decreasing the incidence of the composite endpoint of total mortality, disabling stroke, serious bleeding, or cardiac arrest in patients with untreated or incompletely treated AF. ...
Task Force to Explore Thyroid Applications of Radiofrequency Ablation (RFA). 1. Assess all aspects of radiofrequency ablation (RFA) to include initial FDA approval of the device, CPT codes for payment related to thyroid disease, indications for treatment, anesthesia and safety issues.. 2. Establish a plan for clinical trials of thyroid applications of radio frequency ablation.. 3. Develop educational initiatives and opportunities for AACE members to become proficient in thyroid applications of radiofrequency ablation.. Training workshops in Thyroid RFA presently are located in three centers.. ...
...ROCKVILLE Md. July 6 -- A procedure that sen... ...The report examines the use of a procedure called radiofrequency cathe... ...,New,AHRQ,Study,Finds,Mixed,Evidence,on,Use,of,Radiofrequency,Catheter,Ablation,for,Treating,Atrial,Fibrillation,medicine,advanced medical technology,medical laboratory technology,medical device technology,latest medical technology,Health
Catheter ablation of most arrhythmias has a high success rate. Success rates for WPW syndrome have been as high as 95% [1] For SVT, single procedure success is 91% to 96% (95% CI) and multiple procedure success is 92% to 97% (95% CI).[2] For atrial flutter, single procedure success is 88% to 95% (95% CI) and multiple procedure success is 95% to 99% (95% CI).[2] For automatic atrial tachycardias, the success rates are 70-90%.[citation needed] The potential complications include bleeding, blood clots, pericardial tamponade, and heart block, but these risks are very low, ranging from 2.6-3.2%. For atrial fibrillation, several experienced teams of electrophysiologists in US heart centers claim they can achieve up to a 75% success rate. However one recent study claims that the success rates are in fact much lower - at 28% for single procedures. Often, several procedures are needed to raise the success rate to the 70-80% range.[3] One reason for this may be that once the heart has undergone atrial ...
The advent of catheter ablation has revolutionized the treatment of supraventricular cardiac arrhythmias, including in the last few years, atrial fibrillation. The discovery of electrically active sleeves of atrial myocardium extending into the pulmo
Japans largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies
TY - JOUR. T1 - Radio-frequency thermal ablation of liver metastases with a cooled-tip electrode needle. T2 - Results of a pilot clinical trial. AU - Lencioni, R.. AU - Goletti, O.. AU - Armillotta, N.. AU - Paolicchi, A.. AU - Moretti, M.. AU - Cioni, D.. AU - Donati, F.. AU - Cicorelli, A.. AU - Ricci, S.. AU - Carrai, M.. AU - Conte, P. F.. AU - Cavina, E.. AU - Bartolozzi, C.. PY - 1998. Y1 - 1998. N2 - The aim of this study was to evaluate feasibility, safety, and effectiveness of radio-frequency (RF) thermal ablation, performed by using a cooled-tip electrode needle, in the treatment of liver metastases. Twenty-nine patients (20 males and 9 females; age range 43-77 years) with one to four hepatic metastases 1.1-4.8 cm in diameter (mean 2.9 ± 0.8 cm) from previously resected intra-abdominal primary malignancies were treated. All patients were excluded from surgery and had partial or no response to chemotherapy. Radio-frequency ablation was performed by using a 100-W generator and 17-gauge, ...
Our website is designed for anybody that is seeking information on heart rhythm problems and some of the treatments available. The heart rhythm problems we treat include: atrial fibrillation, ventricular tachycardia, supra-ventricular tachycardia, atrial fibrillation. Our procedures and diagnostic tests used to treat these heart rhythm problems include: radio-frequency ablation, cryo-ablation, atrial fibrillation ablation, atrial flutter ablation, cardiac catheterisation, heart rhythm monitoring, implantable cardiac defibrillators, pacemakers and superventricular tachycardia ablation. The website also introduces our team of consultants and details our full range of procedures.. For general queries about our services, please click here and we will respond within 72 hours. To arrange a consultation, you will need to be referred to us by your GP.. ...
Cardiac arrhythmias are a debilitating, potentially life threatening condition involving aberrant electrical activity in the heart which results in abnormal heart rhythm. Virtual cardioscopy can play an important role in minimally invasive treatment of cardiac arrhythmias. Second and third generation image-guidance systems are now available for the treatment of arrhythmias using RF ablation catheters. While these 3D tools provide useful information to the clinician, additional enhancements to the virtual cardioscopy display paradigm are critical for optimal therapy guidance. Based on input from clinical collaborators, several key visualization techniques have been developed to enhance the use of virtual cardioscopy during cardiac ablation procedures. We have identified, designed and incorporated several visual cues important to successful virtual cardioscopy. These features include the use of global reference maps, parametric mapping, and focused navigation and targeting using abnormal ...
The benefits of avoiding radiation are very clear. While a typical one-off x-ray such as those used to diagnose lung infections or bone fractures emit a single, very low dose of radiation, fluoroscopy involves a continuous stream of x-rays to guide the catheter and map the heart. X-rays are cumulative in ones lifetime. During a typical catheter ablation, patients are exposed to often unnecessary radiation. At teaching hospitals, where doctors are learning on patients, this can be exponentially increased. This cannot be fully mitigated by blocking x-rays with metal (lead), since we require unobstructed views and access to a large area of the torso. Avoidance of fluoroscopy is especially important for those who are more sensitive to radiation such as children, young adults and pregnant women. As with all procedures, the goal is to offer our patients the best outcomes with the fewest potential side effects.. The benefits of a no-radiation option also extend to Dr. Gidney and his staff, who do not ...
The electrical system of the heart controls each heartbeat. Electrical impulses generated by special tissue (nodes) travel set pathways through the heart causing the muscle to contract, or "beat". When abnormal electrical signals interfere with the normal flow of impulses, an irregular heartbeat occurs. Cardiac ablation is a procedure used to correct irregular heartbeats by destroying the tissue that creates the abnormal electrical signals. A catheter is threaded into the heart and the tip is guided to the area producing abnormal electrical signals. The catheter then emits a pulse of high-energy electricity that destroys the abnormal tissue and corrects the irregular heartbeat.. Request Stock Pricing. Parent Topic: Catheter Ablation ...
www.google.eshttp://www.google.es/patents/EP1059067B8?cl=en&utm_source=gb-gplus-sharePatente EP1059067B8 - Ablation treatment of bone metastases ...
Author Response.pdf. Reviewer 2 Report. This paper tests the hypothesis that the Kolmogorov complexity of a single atrial bipolar electrogram recorded during AF within the coronary sinus at the beginning of the catheter ablation may predict AF termination directly after pulmonary vein isolation (PVI). Results show significant differences in Kolmogorov complexity between patients with AF termination directly after PVI compared to patients undergoing additional ablation. Therefore, authors affirm that Kolmogorov complexity of electrograms measured at baseline before PVI can predict self-termination of AF directly after PVI. Overall, I believe that the goal of this study is very interesting and the tools used are appropriate. However, I have several major comments regarding the paper:. Authors talk about complexity measures, however they are different types of measurements and they do not measure complexity. Additional 30 second electrograms recorded 30 prior to AF termination were analyzed as the ...
The results of this meta-analysis indicate that RFA is superior to PEI in terms of overall survival and lower local recurrence rates for patients with Child-Pugh class A or B cirrhosis and an early nonsurgical HCC. However, the higher rate of adverse events displayed is something that will have to be tested with appropriate weighting of the possible benefits in each individual case.. While according to recent guidelines PEI should be considered the standard technique for percutaneous treatment of HCC in patients with cirrhosis [30], RFA has emerged as a real competitor to PEI in clinical grounds and is currently used as the primary ablative modality at most institutions [31, 32]. However, to date, the survival benefit of RFA versus that of PEI for HCC is controversial [1, 13, 14, 31].. In this study, a significant benefit in RFA vs. PEI in overall survival was observed. Interestingly enough, though individual studies provide data only in the first 4 years of treatment, the advantage in survival ...
You will be taken to the catheter lab where a nurse will stay with you and be there to reassure you throughout the procedure. There is a lot of equipment in the room, which is used to monitor your heart rhythm. You will be awake during the procedure, but to help you relax your doctor will give you a short acting sedative.. The doctor will inject a local anaesthetic into your groin to numb your leg. This may sting a little and you may feel some mild discomfort. When the local anaesthetic has taken effect, the doctor will insert a small tube (sheath) into your groin. You should not feel any pain, but let your doctor know if you do. Through the sheath the doctor will gently thread several flexible wires (catheter electrodes) into your heart. These special wires will record and ablate (destroy) the extra electrical signals from within your heart. The type of arrhythmia you have, will determine how many wires your doctor will use for your ablation. The catheters are about the size of a small drinking ...
Santa Rosa, CA (PRWEB) January 28, 2015 -- Atrial fibrillation (Afib) is a common, potentially life-threatening heart condition in which the upper heart
The RFA and/or vertebroplasty with cement injection were successful in all patients (100%). Except for one patient who had cement leakage, no intraprocedural complications occurred. After RFA, severe refractory pain was greatly relieved in all patients, with pretreatment VAS score of 8.1±1.4 significantly reduced to 5.5±1.1 at 24 h, 2.8±0.6 at one week and 1.4±0.8 at 6 months (P,0.01). The EORTC QLQ-C30 scale at one month demonstrated significant improvement (P,0.05) in the physical (P=0.03) and emotion function (P=0.003), global health status (P=0.002), pain (P=0.001) and insomnia (P=0.002). The analgesics were reduced after the procedure and stopped two months later in all patients, with greatly improved quality of life and no apparent pain. Followed up for 6-12 months, all patients remained alive with no recurrence of pain. ...
SUNNYVALE, Calif.--(BUSINESS WIRE)--Mar 6, 2012-- Covidien (NYSE: COV), a leading global provider of healthcare products, today announced the launch of the HALO60 Ablation Catheter, the latest addition to the HALO family of catheters for the endoscopic treatment of Barretts esophagus. The HALO product line joined the Covidien portfolio earlier when the Company acquired BARRX Medical, a leader in the development of minimally invasive medical devices to remove potentially precancerous tissue from the gastrointestinal tract.. Barretts esophagus is a precancerous condition of the lining of the esophagus caused by gastroesophageal reflux disease (GERD). Left untreated, backward flow of stomach contents such as acid and bile into the esophagus can lead to injury and chronic inflammation of the esophagus lining. A proportion of GERD patients are at risk of developing Barretts esophagus, which can lead to esophageal adenocarcinoma, a lethal cancer with a five-year survival rate of approximately ...
Treatment of atrial fibrillation by open cardiac ablation under 3-d mapping (costs for program #139941) ✔ University Hospital Münster ✔ Department of Congenital (CHD) and Acquired Heart Defects ✔ BookingHealth.com
TY - JOUR. T1 - Magnetic resonance imaging characteristics of renal tumors after radiofrequency ablation. AU - Svatek, Robert S.. AU - Sims, Robert. AU - Anderson, J. Kyle. AU - Abdel-Aziz, Khaled. AU - Cadeddu, Jeffrey A.. PY - 2006/3. Y1 - 2006/3. N2 - Objectives. The interpretation of radiographic findings in renal tumors treated with minimally invasive modalities, such as radiofrequency ablation (RFA), is critical for assessing treatment adequacy. Magnetic resonance imaging (MRI) is commonly used for patients with renal insufficiency or contrast allergy. Because the MRI experience with renal RFA is limited, we reviewed our experience and report the unique MRI characteristics of RFA-treated renal tumors. Methods. A single-institution database of renal RFA was reviewed to identify patients followed up with MRI. A radiologist and urologist retrospectively reviewed all MRI scans to identify the characteristic lesion findings after RFA. Results. Eleven patients (12 tumors) treated by RFA were ...
DM Zimmaro; Catheter ablation of ventricular tachycardia and related nursing interventions. Crit Care Nurse 1 July 1987; 7 (4): 20-28. doi: https://doi.org/10.4037/ccn1987.7.4.20. Download citation file:. ...
Background: Pancreatic cancer is the fourth leading cause of cancer related death in the Western world. At time of diagnosis, 20% of patients present with a resectable tumour, 40% with an irresectable locally advanced tumor (without metastases) and 40% with metastatic disease. The median survival of patients with irresectable locally advanced pancreatic cancer is only 6 months. Currently, there is no effective treatment for these patients Importance: There is an urgent need for new therapeutical options in pancreatic adenocarcinoma. Radiofrequency ablation (RFA) is a technique that has been demonstrated to be effective in the treatment of several irresectable tumours such as liver and lung neoplasms. RFA produces local tumour destruction from an electrode implanted directly into the tumour causing frictional heating. Objective: To evaluate whether endoscopic ultrasound-guided radiofrequency ablation (EUSRFA) plus conventional treatment (chemotherapy ± radiotherapy) improves overall survival in ...
This invention is related to a tissue ablation system and method that treats atrial arrhythmia by ablating a circumferential region of tissue at a location where a pulmonary vein extends from an atrium. The system includes a circumferential ablation member with an ablation element and also includes a delivery assembly for delivering the ablation member to the location. The circumferential ablation member is generally adjustable between different configurations to allow both the delivery through a delivery sheath into the atrium and the ablative coupling between the ablation element and the circumferential region of tissue.
DUGi: Viewing Item from repository Recercat: Background: Pancreatic cancer is the fourth leading cause of cancer related death in the Western world. At time of diagnosis, 20% of patients present with a resectable tumour, 40% with an irresectable locally advanced tumor (without metastases) and 40% with metastatic disease. The median survival of patients with irresectable locally advanced pancreatic cancer is only 6 months. Currently, there is no effective treatment for these patients Importance: There is an urgent need for new therapeutical options in pancreatic adenocarcinoma. Radiofrequency ablation (RFA) is a technique that has been demonstrated to be effective in the treatment of several irresectable tumours such as liver and lung neoplasms. RFA produces local tumour destruction from an electrode implanted directly into the tumour causing frictional heating. Objective: To evaluate whether endoscopic ultrasound-guided radiofrequency ablation (EUSRFA) plus conventional treatment (chemotherapy ±
WASHINGTON, DC - New multicenter research reveals that female patients fail ablation procedures more often than male patients, according to a study published in the February edition of the HeartRhythm Journal, the official journal of the Heat Rhythm Society. The study also shows that males undergo catheter ablation for the treatment of atrial fibrillation five times as often as females and typically with significantly fewer complications.