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.
Dive into the research topics of Reversible neuropathy caused by overuse following radiofrequency ablation of metastatic pelvic lesions. Together they form a unique fingerprint. ...
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 ...
Find the best radiofrequency catheter ablation doctors in Thane. Get guidance from medical experts to select radiofrequency catheter ablation specialist in Thane from trusted hospitals - credihealth.com
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 ...
AIMS: Contact force (CF) between radiofrequency (RF) ablation catheter and myocardium and ablation index (AI) correlates with RF lesion depth and width in normal-voltage (,1.5 mV) myocardium (NVM). We investigate the impact of CF on RF lesion depth and width in low (,0.5 mV) (LVM) and intermediate-voltage (0.5-1.5 mV) myocardium (IVM) following myocardial infarction. Correlation between RF lesion depth and width evaluated by native contrast magnetic resonance imaging (ncMRI) and gross anatomical evaluation was investigated.. METHODS AND RESULTS: Twelve weeks after myocardial infarction, 10 pigs underwent electroanatomical mapping and endocardial RF ablations were deployed in NVM, IVM, and LVM myocardium. In vivo ncMRI was performed before the heart was excised and subjected to gross anatomical evaluation. Ninety (82%) RF lesions were evaluated. Radiofrequency lesion depth and width were smaller in IVM and LVM compared with NVM (P , 0.001). Radiofrequency lesion depth and width correlated with ...
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 ...
TY - JOUR. T1 - Clinical significance of early recurrences of atrial tachycardia after atrial fibrillation ablation. AU - Choi, Jong Il. AU - Pak, Hui Nam. AU - Park, Jae Seok. AU - Kwak, Jae Jin. AU - Nagamoto, Yasutsugu. AU - Lim, Hong Euy. AU - Park, Sang Weon. AU - Hwang, Chun. AU - Kim, Young Hoon. PY - 2010/12. Y1 - 2010/12. N2 - Early Recurrence After AF Ablation. Background: Atrial tachycardia (AT) commonly recurs within 3 months after radiofrequency catheter ablation for atrial fibrillation (AF). However, it remains unclear whether early recurrence of atrial tachycardia (ERAT) predicts late recurrence of AF or AT. Methods: Of 352 consecutive patients who underwent circumferential pulmonary vein isolation with or without linear ablation(s) for AF, 56 patients (15.9%) with ERAT were identified by retrospective analysis. ERAT was defined as early relapse of AT within a 3-month blanking period after ablation. Results: During 21.7 ± 12.5 months, the rate of late recurrence was higher in ...
Evidence-based recommendations on endoscopic bipolar radiofrequency ablation for biliary obstruction caused by bile duct and pancreas cancers..
BACKGROUND: Overall survival in hepatocellular carcinoma patients treated with percutaneous radiofrequency ablation is influenced by both recurrence and successive treatments. We investigated post-recurrence survival after radiofrequency ablation.. METHODS: Data on 103 early/intermediate patients initially treated with radiofrequency ablation and followed for a median of 78 months (range 68-82) were retrospectively analysed. If intrahepatic disease recurrence occurred within or contiguous to the previously treated area it was defined as local, otherwise as distant; recurrence classified as Barcelona Clinic Liver Cancer stage C was defined by neoplastic portal vein thrombosis or metastases.. RESULTS: A total of 103 patients were included (82.5% male; median age 70 years, range 39-86). During follow-up, 64 recurrences were observed. Median overall survival was 62 months (95% confidence interval: 54-78) and survival rates were 97%, 65% and 52% at 1, 4 and 5 years, respectively. Median ...
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 - Intracardiac echo-guided radiofrequency catheter ablation of atrial fibrillation in patients with atrial septal defect or patent foramen ovale repair. T2 - A feasibility, safety, and efficacy study. AU - Lakkireddy, Dhanunjaya. AU - Rangisetty, Umamahesh. AU - Prasad, Subramanya. AU - Verma, Atul. AU - Biria, Mazda. AU - Berenbom, Loren. AU - Pimentel, Rhea. AU - Emert, Martin. AU - Rosamond, Thomas. AU - Fahmy, Tamer. AU - Patel, Dimpi. AU - Biase, Luigi Di. AU - Schweikert, Robert. AU - Burkhardt, David. AU - Natale, Andrea. PY - 2008/11/1. Y1 - 2008/11/1. N2 - Intracardiac Echo-Guided Radiofrequency Catheter. Introduction: Patients with atrial septal defect (ASD) are at higher risk for atrial fibrillation (AF) even after repair. Transseptal access in these patients is perceived to be difficult. We describe the feasibility, safety, and efficacy of pulmonary vein antral isolation (PVAI) in these patients. Method: We prospectively compared post-ASD/patent foramen ovale (PFO) ...
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
Purpose: Catheter ablation (CA) procedures are characterized by exposure to ionizing radiations (IR). IR can cause DNA damage and may lead to carcinogenesis if not efficiently repaired. The primary endpoint of this study is to investigate whether intravenous administration of N-acetylcysteine prior to CA procedure may prevent systemic oxidative stress and genomic DNA damage induced by exposure to IR. Methods: The Cardiac Arrhythmia catheter ablation procedures guided by x-Ray imaging: N-Acetylcysteine Protection Against radiation induced Cellular damagE (CARAPACE) study is a prospective, randomized, single-blinded, parallel-arm monocenter study enrolling 550 consecutive patients undergoing CA at the Arrhythmology Unit of Centro Cardiologico Monzino (CCM). Inclusion criteria are age ≥ 18, indication for CA procedure guided by IR imaging, and written informed consent. IR levels will be measured via fluoroscopy time, effective dose, and dose area product. Glutathione and glutathione disulfide ...
TY - JOUR. T1 - Heating distribution of multipolar radiofrequency ablation catheters. AU - Mirotznik, Mark S.. AU - Demazumder, Deep Tankar. AU - Jones, Jeffery R.. AU - Schwartzman, David S.. PY - 1997/12/1. Y1 - 1997/12/1. N2 - An experiment was conducted to characterize the heating pattern or specific absorption rate (SAR) of multipolar radiofrequency (RF) ablation catheters under several electrode configurations. The electrode configurations are unipolar, bipolar, and hybrid configuration. Results revealed significant differences in the catheter SAR pattern across the different configurations.. AB - An experiment was conducted to characterize the heating pattern or specific absorption rate (SAR) of multipolar radiofrequency (RF) ablation catheters under several electrode configurations. The electrode configurations are unipolar, bipolar, and hybrid configuration. Results revealed significant differences in the catheter SAR pattern across the different configurations.. UR - ...
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 ...
The goal of the trial was to evaluate treatment with high-frequency source ablation compared with circumferential pulmonary vein isolation among patients with symptomatic drug-refractory atrial fibrillation (AF).. Contribution to the Literature: The RADAR-AF trial showed that high-frequency source ablation plus circumferential pulmonary vein isolation was not superior to circumferential pulmonary vein isolation alone.. ...
BACKGROUND: The catheter ablation using radiofrequency(RF) energy in patients with AV nodal reentrant tachycardia(AVNRT) has been proved as a safe and effective nonpharmacologic therapeutic modality. The selective ablation of slow pathway is now becomming a standard treatment in patients with AVNRT because of its high success rate and negligible AV block risk. In our study, we demonstrated the feasibility, success rate and complications of selective radiofrequency catheter ablation of fast pathway or slow pathway for the treatment of AV nodal reentrant tachycardia. METHODS: Among patients diagnosed as AVNRT by electrophysiologic study, total 21 patients (M : F=11 :10, mean age ; 39 years old) were included in this study. Selective RF ablation of fast pathway was performed in 9 patients and selective RF ablation of slow pathway in 12 patients. The RF generator used in this study was Osypka HAT 200 model and catheters were 6F or 7F steerable catheters with 4 mm distal tip. RESULTS: The successful ...
TY - JOUR. T1 - Radiofrequency catheter ablation of atrioventricular nodal reentrant tachycardia in a patient with orthotopic heart transplantation by bicaval anastomosis. AU - Rodríguez De Armas, Lissette. AU - Dorantes, Margarita. AU - Castro, Jesús. AU - Tornés, Francisco José. AU - Rodríguez, Julio César. AU - Fayad, Yanela. AU - Almeida, Javier. PY - 2006/4/1. Y1 - 2006/4/1. UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33749438223&origin=inward. UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=33749438223&origin=inward. U2 - 10.1007/s10840-006-9009-5. DO - 10.1007/s10840-006-9009-5. M3 - Article. SP - 171. EP - 174. JO - Journal of Interventional Cardiac Electrophysiology. JF - Journal of Interventional Cardiac Electrophysiology. SN - 1383-875X. ER - ...
Preface, vii List of contributors, ix. VeniceChart task force composition, xxxiii. List of abbreviations, xxxvii. 1 Anatomy of structures relevant to atrial fibrillation ablation, 1. 2 Pathophysiology of atrial fibrillation, 20. 3 Techniques and technologies for atrial fibrillation catheter ablation, 35. 4 Endpoints of catheter ablation for atrial fibrillation, 61. 5 Patient management pre-, during-, and postablation, 70. 6 Periprocedural and long-term anticoagulation, 77. 7 Periprocedural and late complications, 85. 8 Short- and long-term efficacy of catheter ablation procedures for atrial fibrillation, 118. 9 Indications to atrial fibrillation ablation and cost-effectiveness, 127. 10 Clinical trials on atrial fibrillation/future perspectives, 137. 11 Surgical approach/ablation, 161. 12 Hospital equipment and facilities, personnel, training requirements, and competences, 176. Index, 184. ...
Background: Radiofrequency (RF) catheter ablation is the procedure of choice for the potential cure of atrioventricular nodal reentrant tachycardia (AVNRT) with high success rates. We hypothesed that as a result of the close proximity of Kochs triangle and low inter-atrial septal fibers, the RF ablation applied at this region may result in prolongation of inter-atrial conduction time (IACT). Methods: RF ablation of AVNRT was performed by conventional technique. IACT was measured before and 20 minutes after RF ablation during sinus rhythm. Number of ablations given and duration of ablation were noted. Results: The study group was consisted of 48 patients (36 [75%] female, 12 [25%] male, mean age 43.4 ± 14. 5 years). RF ablation was successful in all patients. Mean RF time was 4. 0 ± 3. 3 minutes and mean number of RF was 11. 9 ± 9, 8. The mean IACT was 70.1 ± 9.0 ms before ablation and 84.9 ± 12.7 ms after ablation, which demonstrated a significant prolongation (p,0.001). The prolongation ...
Atrioventricular nodal reentry tachycardia (AVNRT) is the most common arrhythmia in electrophysiology laboratory. The classical approach to the treatment is ablation of slow or fast pathway with right approach. In 3% of cases, conventional classical approach is insufficient and tachycardia recurs again. In aggressive right-hand side ablation, AV block can be seen. Experience with AVNRT ablation with left approach is limited. The aim of this study was to examine the results of the early ablation of typical AVNRT with the left approach.. 150 patients with typical AVNRT ablation by conventional methods in electrophysiology laboratory were included in the study. The average age of the patients was 43.2±2.6. 12. In 12 patients (8%) recurrence was observed immediately after the procedure. With retrograde aortic approach left posteroseptal radiofrequency (RF) energy was given to all 12 cases. The rhythm of the intersection in all cases observed. RF energy is until you return to sinus rhythm. ...
TY - JOUR. T1 - Catheter ablation of atrial fibrillation in patients with concomitant left ventricular impairment: a systematic review of efficacy and effect on ejection fraction. AU - Ganesan, Anand. AU - Nandal, Savvy. AU - Luker, Jakob. AU - Pathak, Rajeev. AU - Mahajan, Rajiv. AU - Twomey, Darragh. AU - Lau, Dennis. AU - Sanders, Prashanthan. PY - 2015/3/1. Y1 - 2015/3/1. N2 - Introduction: Catheter ablation of atrial fibrillation (AF) is an established rhythm control strategy; however, the impact of co-existing LV systolic dysfunction (LVSD) on ablation success is less well understood. This systematic review compiles the outcomes of catheter ablation of atrial fibrillation in patients with LVSD. Methods: An electronic database (Pubmed, Scopus, Embase) search using the keywords atrial fibrillation AND ablation AND (ventricular dysfunction OR heart failure OR cardiomyopathy) was performed for English scientific literature up to 01/01/2014. 2484 references were retrieved and evaluated for ...
There are still some AV nodal reentrant tachycardias with unusual AV nodal properties that need further study to understand these complexities. Accordingly, the two-dimensional model with alpha and beta pathways in the AV nodal reentrant tachycardia
GRÖNEFELD, G. C., WEGENER, F., ISRAEL, C. W., TEUPE, C. and HOHNLOSER, S. H. (2003), Thromboembolic Risk of Patients Referred for Radiofrequency Catheter Ablation of Typical Atrial Flutter Without Prior Appropriate Anticoagulation Therapy. Pacing and Clinical Electrophysiology, 26: 323-327. doi: 10.1046/j.1460-9592.2003.00042.x ...
Laser, Rf or catheter ablation to treat atrioventricular nodal reentrant tachycardia (avnrt) (3d-controlled fluoroscopy) (costs for program #159909) ✔ University Hospital Düsseldorf ✔ Department of General Pediatrics, Neonatology and Pediatric Cardiology ✔ BookingHealth.com
Laser, Rf or catheter ablation to treat atrioventricular nodal reentrant tachycardia (avnrt) (3d-controlled fluoroscopy) (costs for program #126283) ✔ University Hospital Rechts der Isar of the Munich Technical University ✔ Department of Pediatrics ✔ BookingHealth.com
In an accompanying editorial in the same journal from Andre dAvila, Hospital Cardiologico, Florianópolis, Santa Catarina, Brazil and Sheldon M Singh, Schulich Heart Program, Sunnybrook Hospital, University of Toronto, Toronto, Canada, note that the last decades have witnessed tremendous growth in the field of catheter ablation, with several studies allowing for a better understanding of the substrate and mechanism of ventricular tachycardia. They also highlight the development of irrigated ablation catheters, sophisticated mapping systems and other technological developments including the use of adjunctive computed tomography/magnetic resonance imaging that have enabled both improved clinical success and decreased periprocedural complications. Indeed, these gains have resulted in a defined role for ventricular tachycardia ablation in clinical guidelines, they write.. DAvila and Singhs editorial brought to the fore the noteworthy findings from the study including the low rate of procedural ...
ntroduction: Long side-firing microwave (MW) arrays can deliver energy uniformly over its length without the need for intimate endocardial contact. We hypothesize that a novel 6 Fr 20 mm long percutaneous high-efficiency MW antenna array ablation catheter can rapidly create long, continuous, and transmural linear ablation lesions. Methods and Results: Cavotricuspid isthmus (CTI)-dependent atrial flutter (AFL) was created in 11 sheep by a line of radiofrequency ablation lesions in the posterior right atrium (RA) linking the venae cavae. After 46 weeks recovery, CTI-dependent AFL was still inducible in all 11 sheep (cycle length 178 ± 13 ms). MW ablation of the CTI at 100 W for 30 seconds was then performed with an endpoint of AFL noninducibility. AFL was not inducible in all 11 sheep after 4.3 ± 3.3 MW applications (129 ± 99 seconds). The last 6 animals needed fewer ablations (2.2 ± 1.5) and 3 of these sheep required only a single ablation. Although conduction times from proximal coronary ...
TY - JOUR. T1 - Mitral annuloplasty ring dehiscence demonstrated by preablation cardiac computed tomographic angiography. T2 - Influence on radiofrequency ablation of atrial fibrillation. AU - Cheng, Alan. AU - George, Richard. PY - 2012/7/1. Y1 - 2012/7/1. N2 - We present a case that demonstrates mitral valve annuloplasty ring dehiscence discovered on a cardiac computed tomography imaging study performed prior to radiofrequency ablation for atrial fibrillation. We describe the relevant imaging findings and the clinical implications this finding has on catheter selection and patient safety during a radiofrequency ablation procedure.. AB - We present a case that demonstrates mitral valve annuloplasty ring dehiscence discovered on a cardiac computed tomography imaging study performed prior to radiofrequency ablation for atrial fibrillation. We describe the relevant imaging findings and the clinical implications this finding has on catheter selection and patient safety during a radiofrequency ...
Radiofrquency (RF) treatments for low back pain are known by a few different names: radiofrequency, radiofrequency lesioning, radiofrequency ablation, and radiofrequency neurotomy. Common side effects of ablation of the endometrium are vaginal discharge, menstrual-style cramping and frequent urination. Since radiofrequency ablation is less invasive than stripping and ligation surgery, complications and associated risks can be avoided.. What you are experiencing are normal side effects following an ablation procedure. These side effects include thermal injury to the skin, nerves, muscles, or. A needle electrode is used to send electrical currents to the nerves in your facet joint. The risk of complication from radiofrequency ablation is very low.. Packer DL, et al. Possible Side Effects of Radiofrequency Ablation Therapy. Nerve damage may cause feelings of burning, pain or prickling after the surgery. The sheath usually stays in your leg for several hours after catheter ablation. you may ...
Aims To test the ability of four circulating biomarkers of fibrosis, and of low left atrial voltage, to predict recurrence of atrial fibrillation after catheter ablation. Background Circulating biomarkers potentially may be used to improve patient selection for atrial fibrillation ablation. Low voltage areas in the left atrium predict arrhythmia recurrence when mapped in sinus rhythm. This study tested type III procollagen N terminal peptide (PIIINP), galectin-3 (gal-3), fibroblast growth factor 23 (FGF-23), and type I collagen C terminal telopeptide (ICTP), and whether low voltage areas in the left atrium predicted atrial fibrillation recurrence, irrespective of the rhythm during mapping. Methods 92 atrial fibrillation ablation patients were studied. Biomarker levels in peripheral and intra-cardiac blood were measured with enzyme-linked immunosorbent assay. Low voltage (,0.5mV) was expressed as a proportion of the mapped left atrial surface area. Follow-up was one year. The primary endpoint was ...
TY - JOUR. T1 - Use of advanced mapping systems to guide ablation in complex cases. T2 - Experience with noncontact mapping and electroanatomic mapping systems. AU - Gurevitz, Osnat T.. AU - Glikson, Michael. AU - Asirvatham, Samuel. AU - Kester, Tammy A.. AU - Grice, Suellen K.. AU - Munger, Thomas M.. AU - Rea, Robert F.. AU - Shen, Win Kuang. AU - Jahangir, Arshad. AU - Packer, Douglas L.. AU - Hammill, Stephen C.. AU - Friedman, Paul A.. PY - 2005/4/1. Y1 - 2005/4/1. N2 - Objective: This report describes our experience with noncontact mapping and electroanatomic mapping in complex ablations, which are defined as ablations done after failure of conventional ablation. Material and Methods: Patients were included (N = 68; 49% with structural heart disease) in whom previous ablation failed and in whom a second procedure was done with advanced mapping. Non-contact mapping was used in 17 patients, electroanatomic mapping in 36, and both noncontact and electroanatomic mapping in 15. Arrhythmias ...
Di Biase highlighted that non-randomised studies have previously suggested that substrate ablation is superior to conventional ablation of clinical stable ventricular tachycardia achieving freedom from any ventricular tachycardia at follow-up; however, randomised data were lacking.. Di Biase told Cardiac Rhythm News: In the VISTA study we found that the substrate-based ablation approach allows performing ventricular tachycardia ablation while in sinus rhythm, therefore the procedure might be a bit easier for the physician and for the patient and with better success rates. He said that 84.5% patients treated with the substrate based ablation approach were free from any clinical ventricular tachycardia at 12 months follow-up compared to 51.7% patients treated with the conventional approach.. Between April 2009 and July 2013, 118 patients with symptomatic, drug refractory, haemodinamically stable clinical ventricular tachycardias were enrolled at seven centres in the USA and Europe. They were ...
TY - JOUR. T1 - Gender, race, and health insurance status in patients undergoing catheter ablation for atrial fibrillation. AU - Patel, Nileshkumar. AU - Deshmukh, Abhishek. AU - Thakkar, Badal. AU - Coffey, James O.. AU - Agnihotri, Kanishk. AU - Patel, Achint. AU - Ainani, Nitesh. AU - Nalluri, Nikhil. AU - Patel, Nilay. AU - Patel, Nish. AU - Patel, Neil. AU - Badheka, Apurva O.. AU - Kowalski, Marcin. AU - Hendel, Robert. AU - Viles-Gonzalez, Juan. AU - Noseworthy, Peter A.. AU - Asirvatham, Samuel. AU - Lo, Kaming. AU - Myerburg, Robert J.. AU - Mitrani, Raul D.. PY - 2016/4/1. Y1 - 2016/4/1. N2 - Catheter ablation for atrial fibrillation (AF) has emerged as a popular procedure. The purpose of this study was to examine whether there exist differences or disparities in ablation utilization across gender, socioeconomic class, insurance, or race. Using the Nationwide Inpatient Sample (2000 to 2012), we identified adults hospitalized with a principal diagnosis of AF by ICD 9 code 427.31 who had ...
The following sections summarize the data analysis for the different subgroups.. Atrioventricular Nodal Re-entrant Tachycardia. In 2018, this target was once again the second most treated substrate. A total of 3525 AVNRT ablation procedures were performed (21% of the total) in 96 hospitals. There were 96 more procedures than in the previous year, which, in conjunction with a slight reduction in CTI ablation procedures, explains its elevation to second place.. The mean number of procedures was 31.3±12 (range, 1-145), with a success rate of 96%; 69% of centers reported a 100% success rate.. Eleven severe complications were reported (0.3%): 3 cases of atrioventricular block requiring a pacemaker, 6 vascular complications, 1 heart failure event, and 1 pulmonary thromboembolism.. The 4-mm radiofrequency ablation catheter tip is still the most frequently used catheter (96% of procedures). Although the use of other catheters and energy sources was low, the use of cryoablation increased this year, to ...
Catheter ablation is a minimally invasive procedure used to remove or destroy faulty electrical pathways from sections of the heart that promote irregular cardiac rhythms (also known as cardiac arrhythmias). Cardiac arrhythmias can be of several types, including atrial fibrillation, atrial flutter, and supraventricular tachycardia. Atrial fibrillation is the most common type of cardiac arrhythmia prevalent among the global population. EP ablation catheters are devices used to treat cardiac arrhythmias. These catheters destroy the faulty tissue with the use heat energy generated from RF, laser and microwave radiation or by freezing the abnormal tissue.. Analysts forecast the Global Electrophysiology Ablation Catheters market to grow at a CAGR of percent over the period 2013-2018.. Covered in this Report. The Global Electrophysiology Ablation Catheters market can be segmented into five divisions: RF Ablation EP Catheters, Cryoablation EP Catheters, Laser Ablation Systems, Microwave Ablation EP ...
Guides you through the decision to have catheter ablation for the heart rhythm problem supraventricular tachycardia. Lists benefits and risks of catheter ablation and medical therapy. Includes interactive tool to help you make your decision.
antiarrhythmic medications - MedHelps antiarrhythmic medications Center for Information, Symptoms, Resources, Treatments and Tools for antiarrhythmic medications. Find antiarrhythmic medications information, treatments for antiarrhythmic medications and antiarrhythmic medications symptoms.
Aims Steering soft, flexible catheters using an external magnetic field could have advantages for heart catheterization, especially for therapy of tachyarrhythmias. Our aims were to assess the feasibility of magnetic navigation to Kochs triangle and reliable ablation of atrioventricular nodal re-entry tachycardia (AVNRT) with a magnetic catheter.. Methods and results Consecutive patients with AVNRT were mapped and ablated with a magnetically enabled catheter (Helios I or II), with, respectively, one and three magnets at the tip. The catheter was remotely advanced with the Cardiodrive™ system and orientated with the Navigant™ control system. After initial positioning with the external magnets, adjustment was made in 5° steps. Success rates, procedure, and fluoroscopy times were analysed, and compared with a local contemporary series of conventional AVNRT ablations. Magnetic navigation was feasible in all 20 patients. Targets were easily reached. Catheters remained stable in position during ...
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.
Although pulmonary vein isolation is accepted as an established interventional treatment in paroxysmal atrial fibrillation (AF), alternative modalities are being investigated because of the high recurrence rates of nonparoxysmal forms. One of the alternative ablation approaches is ablation or modification of vagal ganglionated plexi (VGP). The technique has not only been used in vagally mediated AF but also investigated in paroxysmal and nonparoxysmal AF. Clinical studies demonstrate significant discrepancy related with detection of VGP sites or ablation targets and definition of procedurel end-points, so far. In this review, we aimed to discuss the current data on the role of VGP in the pathogenesis of AF and potential therapeutic implications of ablation of these ganglia.. Keywords: parasympathetic, vagal ganglia, cardioneuroablation, tachycardia, ...
The macro-reentrant circuit of isthmus-dependent atrial flutter (AFL) is located in the right atrium around the tricuspid annulus. High acute success and low recurrence rate makes isthmus ablation a definitive therapy for patients with only AFL. However, a review of the literature suggests that, different aspects of this macro-reentrant circuit are still not entirely understood, while new information continues to emerge. The aim of this article is to discuss some gaps in our complete understanding of isthmus-dependent AFL. Few hypotheses have been stated which are open to investigation. ...
Radio frequency ablation devices have found a widespread application in arthroscopic surgery. However, recent publications report about elevated temperatures, which may cause damage to the capsular tissue and especially to chondrocytes. The purpose of this study was the investigation of the maximum temperatures that occur in the ankle joint with the use of a commercially available radio frequency ablation device. Six formalin-fixed cadaver ankle specimens were used for this study. The radio frequency device was applied for 120 s to remove tissue. Intra-articular temperatures were logged every second for 120 s at a distance of 3, 5 and 10 mm from the tip of the radio frequency device. The irrigation fluid flow was controlled by setting the inflow pressure to 10 mmHg, 25 mmHg, 50 mmHg and 100 mmHg, respectively. The controller unit voltage setting was set to 1, 5 and 9. Maximum temperatures exceeding 50 °C/122 °F were observed for all combinations of parameters, except for those with a pressure of 100
Antiarrhythmic drugs alone control atrial flutter in only 50-60% of patients. Since the early 1990s, radiofrequency catheter ablation (RFA) has been used to interrupt the reentrant circuit in the righ... more
Methods and Results We studied 41 patients who underwent successful catheter ablation of LPF-VT with HV interval ,0 ms (n=8; proximal-LPF group), HV interval 0 to −15 ms (n=15; middle-LPF group), and HV interval ,-15 ms (n=18; distal-LPF group). The earliest mapped presystolic potential (PP)-QRS interval was 34.1±4.2, 24.5±3.2, and 19.4±2.8 ms in proximal-, middle-, and distal-LPF groups. The earliest PP ratio (PP-QRS interval during VT/HV interval during sinus rhythm) was 0.59±0.05, 0.45±0.07, and 0.31±0.05 in the proximal-, middle-, and distal-LPF groups. There were statistically significant differences between the 3 groups in earliest PP ratio, and there was close correlation between the HV interval during LPF-VT and earliest PP ratio. The QRS duration in the proximal-LPF group (114±6 ms) was significantly narrower compared with the middle-LPF group (128±5 ms) and distal-LPF group (140±6 ms). In leads I and V6, the ratio of R/S tended to be greater in the proximal-LPF group ...
Left dominant arrhythmogenic cardiomyopathy (LDAC) is a rare condition characterised by progressive fibrofatty replacement of the myocardium of the left ventricle (LV) in combination with ventricular arrhythmias of LV origin. A thirty-five-year-old male was referred for evaluation of recurrent sustained monomorphic ventricular tachycardia (VT) of 200 bpm and right bundle branch block (RBBB) morphology. Cardiac magnetic resonance imaging showed late gadolinium enhancement distributed circumferentially in the epicardial layer of the LV free wall myocardium including the rightward portion of the interventricular septum (IVS). The clinical RBBB VT was reproduced during the EP study. Ablation at an LV septum site with absence of abnormal electrograms and a suboptimum pacemap rendered the VT of clinical morphology noninducible. Three other VTs, all of left bundle branch block (LBBB) pattern, were induced by programmed electrical stimulation. The regions corresponding to abnormal electrograms were identified
Atrial fibrillation is a heart arrhythmia in which abnormal electrical signals begin in the atria (top chambers) of the heart. Atrial fibrillation may be treated by catheter ablation, if medications alone are not effective. In ablation, areas of tissue in the heart that cause arrhythmias are destroyed.. Before ablation procedure, electrical mapping of the heart is performed. An electrically-sensitive catheter is used to map the heart muscle and the origins of the electrical activity throughout the heart. The map tells the specialist which areas of the heart are creating problematic electric signals that interfere with the proper rhythm.. Catheter ablation is a non-invasive procedure; no major incision is necessary. A surgeon inserts a catheter into the heart via a blood vessel. The surgeon carefully destroys malfunctioning tissue using the catheter to deliver energy (such as radiofrequency, laser or cyrotherapy) to scar the problematic areas. The scarred areas will no longer send abnormal ...
Thyroid Radiofrequency Ablation of Thyroid Nodules: A 2017 Preview Comments. Richard Guttler MD,FACE,ECNU. Clinical Professor of Medicine Keck/USC school of Medicine. Director, Santa Monica Thyroid Center, Santa Monica Ca 90404. Member, American Association of Clinical Endocrinologists task force on the introduction of thyroid radiofrequency ablation RFA of thyroid nodules to the United States.. [email protected] www.thyroid.com. Introduction Comments. Radiofrequency Ablation has been reported in various tumors including liver or kidney tumors but not for thyroid in the USA. However thyroid RFA has been reported to be a safe and efficient treatment option in managing symptomatic cold thyroid nodules or hyperfunctioning thyroid nodules in other countries. Cosmetic and symptoms have been shown to be significantly improved both in the short and long terms after RFA.. ...