Search Results
Results 201 - 250 of 1858
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Di Donna Paolo - - 2010
AIMS: In patients with hypertrophic cardiomyopathy (HCM) and atrial fibrillation (AF), radiofrequency catheter ablation (RFCA) represents a promising option. However, the predictors of RFCA efficacy remain largely unknown. We assessed the outcome of a multicentre HCM cohort following RFCA for symptomatic AF refractory to medical therapy. METHODS AND RESULTS: Sixty-one ...
Schulenberg Richard - - 2010
BACKGROUND: Although chronic atrial fibrillation (AF) is thought to negatively affect survival after aortic valve replacement (AVR), evidence is limited and intraoperative methods to restore sinus rhythm are not widely adopted. This study investigated long-term outcome in valve prosthesis patients with or without AF. METHODS: Between 1994 and 2006, 420 ...
Zellerhoff Stephan - - 2010
Radiofrequency catheter ablation is increasingly used in the treatment of atrial fibrillation. Esophageal wall changes varying from erythema to ulcers have been described by endoscopy in up to 47% of patients following pulmonary vein isolation (PVI). Although esophageal changes are frequently reported, the development of a left atrial (LA)-esophageal fistula ...
- - 2010
BACKGROUND: Atrial fibrillation (AF), the most common significant cardiac arrhythmia, increases the risk of stroke, particularly in the elderly. Warfarin is effective in reducing stroke risk but is burdensome to patients and is difficult to control. Rivaroxaban is an oral direct factor Xa inhibitor in advanced development as an alternative ...
Pokushalov Evgeny - - 2010
AIMS: To study the potential efficacy of ganglionated plexi (GP) ablation in the setting of longstanding persistent atrial fibrillation (AF). METHODS AND RESULTS: Anatomic ablation at the areas of GP in the left atrium was performed in 89 patients with symptomatic, drug-refractory, persistent AF (71 men, 56 +/- 7 years ...
Tamura Kiyoshi - - 2010
PURPOSE: The aim of this observational study was to determine the incidence of atrial fibrillation (AF) after coronary artery bypass grafting (CABG) in patients with or without preoperative pravastatin treatment. METHODS: Between January 2005 and December 2007, a total of 195 patients (39 women, mean age 66.5 +/- 10.2 years) ...
de Groot Natasja M S - - 2010
Catheter ablation has evolved as a possible curative treatment modality for atrial tachyarrhythmia (AT) in patients with congenital heart defects (CHD). However, data on long-term outcome are scarce. We examined characteristics of recurrent AT after ablation of postoperative AT during long-term follow-up in CHD patients. CHD patients (n=53; 27 men; ...
Komatsu Takashi - - 2010
We evaluated the efficacy of antiarrhythmic drug therapy (AAD) and long-term cardiovascular prognosis in patients with asymptomatic paroxysmal atrial fibrillation (AF). This retrospective study included 334 patients (229 men and 105 women, mean age, 69 +/- 11 years, mean follow-up, 60 +/- 11 months) who were divided into two groups; ...
Hayes Christopher Ruslan - - 2010
INTRODUCTION: A recent single-center report indicated that the performance of atrial fibrillation ablation in patients on uninterrupted warfarin using a conventional deflectable tip electrode ablation catheter may be as safe as periprocedural discontinuation of warfarin and bridging with heparin. Novel multi-electrode array catheters for atrial fibrillation ablation are currently undergoing ...
Wakui Noritaka - - 2010
BACKGROUND/AIMS: The incidence of local recurrence of hypervascular hepatocellular carcinoma (HCC) (15 mm or less) was compared retrospectively between a group treated with radiofrequency ablation (RFA) using cool-tip (Radionics, USA) 10-mm electrodes and a group treated with percutaneous ethanol injection (PEI). METHODOLOGY: There were 23 patients who were treated for ...
Jin Hwang Hye - - 2010
The purpose of this study was to investigate the relationship between the efficacy of the 2 different ablation techniques of atrial fibrillation (AF) and left atrial (LA) size. A total of 81 patients with paroxysmal AF (n = 58) or persistent AF (n = 23) refractory to antiarrhythmic drugs underwent ...
Park Seong-Mi - - 2010
BACKGROUND: The purpose of this study was to determine whether atrial electromechanical conduction time (EMT) measured by echocardiography can predict 6-month maintenance of sinus rhythm (SR) after electrical cardioversion in patients with atrial fibrillation (AF). METHODS: Fifty-three patients with persistent AF (>1 month) who had successful cardioversion and 30 controls ...
Papagiannis John - - 2010
Cryoablation is used increasingly for the treatment of atrioventricular nodal reentrant tachycardia (AVNRT). We sought to compare the long-term outcomes of cryoablation (Cryo) vs. radiofrequency (RF) ablation for the treatment of AVNRT in children. Two groups of consecutive patients were analyzed retrospectively: the RF group, 20 patients (60% males, mean ...
Beukema Rypko P - - 2010
AIM: A novel multi-electrode pulmonary vein ablation catheter (PVAC) combining circular mapping and duty-cycled multi-electrode radiofrequency (RF) energy delivery has been developed to map and isolate the pulmonary veins (PVs). The aim of this study was to assess the efficacy of multi-electrode RF ablation using the PVAC device. METHODS AND ...
Pluta Slawomir - - 2010
PURPOSE: Radiofrequency current ablation (RFCA) of ventricular tachycardia (VT) is usually performed using a retrograde transaortic approach. We compared the mapping accuracy, procedural course, safety, and results of VT ablation using transseptal and transaortic route. METHODS: Twenty-one consecutive patients with ischemic cardiomyopathy and history of electrical storm underwent RFCA with ...
Sato Hirokazu - - 2010
INTRODUCTION: Pathological studies have demonstrated that the cavotricuspid isthmus (CTI) is often composed of discrete muscle bundles, which are thought to be represented electrically as high-amplitude electrograms. Based on this observation, we visualized the bundles using an electro-anatomical mapping system (EAMS) and investigate the efficacy of bundle ablation which is ...
Themistoclakis Sakis - - 2010
OBJECTIVES: The aim of this multicenter study was to evaluate the safety of discontinuing oral anticoagulation therapy (OAT) after apparently successful pulmonary vein isolation. BACKGROUND: Atrial fibrillation (AF) is associated with an increased risk of thromboembolic events (TE) and often requires OAT. Pulmonary vein isolation is considered an effective treatment ...
LaPage Martin J - - 2010
The long-term efficacy and complications of cryoablation for pediatric atrioventricular nodal reentrant tachycardia (AVNRT) have not been completely defined. We performed a retrospective review of pediatric patients diagnosed with AVNRT and treated with cryoablation therapy. A total of 73 patients underwent cryoablation for AVNRT from 2003 to 2008. Of the ...
Akhlaghpoor Shahram - - 2010
Osteoid osteoma has a nidus surrounded by sclerotic bone with a size usually less than 20 mm. Its diagnosis is made on typical presentation of nocturnal pain and imaging findings. Excision of the niduses, which are often small and difficult to precisely identify, sometimes may result in resection of surrounding ...
Hwang Eui-Seock - - 2010
Although open irrigation tip catheters (OITC) are effective in producing transmural radiofrequency (RF) lesions, they have the potential for fluid overload or excessive tissue damage. The 203 patients with non-paroxysmal atrial fibrillation (NPAF; 85.2% males, 55.2+/-10.6 years old) who underwent RF catheter ablation (RFCA) were analyzed retrospectively. Clinical outcomes and ...
Wang Yang - - 2011
To evaluate the safety and therapeutic efficacy of ultrasound (US)-guided high-intensity focused ultrasound (HIFU) ablation for the treatment of abdominal wall endometriosis (AWE). Twenty-one consecutive patients with AWE were treated as outpatients by US-guided HIFU ablation under conscious sedation. The median size of the AWE was 2.4cm (range 1.0-5.3cm). An ...
Rostock Thomas - - 2010
Atrial tachycardias (AT) often occur after ablation of long-lasting persistent AF (CAF) and are difficult to treat conservatively. This study evaluated mechanisms and success rates of conventional mapping and catheter ablation of recurrent ATs occurring late after stepwise ablation of CAF. A total of 320 patients underwent de novo ablation ...
Teh Andrew W - - 2010
OBJECTIVES: This study aimed to characterize the long-term outcome and incidence of atrial fibrillation (AF) in patients following catheter ablation of focal atrial tachycardia (AT) from the pulmonary veins (PV). BACKGROUND: Although both AT and AF may originate from ectopic foci within PVs, it is unknown whether PV AT patients ...
Elayi Claude S - - 2010
Ablation of long-standing persistent atrial fibrillation (AF) remains challenging, with a lower success rate than paroxysmal AF. A reliable ablation endpoint has not been demonstrated yet, although AF termination during ablation may be associated with higher long-term maintenance of sinus rhythm (SR). The purpose of this study was to determine ...
Straus Slavenka - - 2010
The main goal of our study was to evaluate possible perioperative risk factors for occurrence of atrial fibrillation in the postoperative period in patients after CABG operations. The study included 140 patients after CABG, divided into two groups - Group I - 64 patients with new onset of POAF and ...
Bonvini R F - - 2010
OBJECTIVE: The occurrence of atrial fibrillation after percutaneous closure of a patent foramen ovale for cryptogenic stroke has been reported in a variable percentage of patients. However, its precise incidence and mechanism are presently unclear and remain to be elucidated. DESIGN: Prospective follow-up study. PATIENTS: Ninety-two patients undergoing a percutaneous ...
Thiagalingam Aravinda - - 2010
INTRODUCTION: Ablation electrode-tissue contact has been shown to be an important determinant of lesion size and safety during nonirrigated ablation but little data are available during irrigated ablation. We aimed to determine the importance of contact force during irrigated-tip ablation. METHODS AND RESULTS: Freshly excised hearts from 11 male pigs ...
Aktas Mehmet K - - 2010
INTRODUCTION: Atrial flutter (AFL) is common after cardiac surgery. However, the types of post-cardiac surgery AFL, its response to catheter-based radiofrequency ablation, and its relationship to atrial fibrillation (AF) are unknown. METHODS AND RESULTS: We retrospectively studied all patients who underwent mapping and ablation for AFL after cardiac surgery from ...
Metzner Andreas - - 2010
AIMS: High-intensity focused ultrasound (HIFU) applied via a balloon catheter is a novel technology for pulmonary vein isolation (PVI) in patients with paroxysmal atrial fibrillation (PAF). The long-term success rate is unknown. METHODS AND RESULTS: Thirty-two patients (22 male, age 60 +/- 9 years) with a long history [5 (4;9) ...
Castellá Manuel - - 2010
OBJECTIVE: Pulmonary vein isolation is indicated in patients with symptomatic isolated atrial fibrillation not controlled with antiarrhythmic therapy. We describe our surgical experience with thoracoscopic pulmonary vein isolation in patients in whom percutaneous ablation has failed. METHODS: Thirty-four adult patients with unsuccessful catheter ablations (range 1-4, mean 2 +/- 1) ...
Wilber David J - - 2010
CONTEXT: Antiarrhythmic drugs are commonly used for prevention of recurrent atrial fibrillation (AF) despite inconsistent efficacy and frequent adverse effects. Catheter ablation has been proposed as an alternative treatment for paroxysmal AF. OBJECTIVE: To determine the efficacy of catheter ablation compared with antiarrhythmic drug therapy (ADT) in treating symptomatic paroxysmal ...
Senga Michiharu - - 2010
BACKGROUND: After extensive encircling of ipsilateral pulmonary vein isolation (EEPVI) for atrial fibrillation (AF), we sometimes observe AF recurrence, or the occurrence of atrial tachycardia originating from the left atrium. This study examined the efficacy of additional linear ablation at the left atrial (LA) roof in combination with EEPVI to ...
Wolber Thomas - - 2010
Catheter ablation is an effective and safe treatment for various arrhythmic disorders. Patients are frequently admitted for an overnight stay after the ablation procedure to monitor for possible postprocedural complications or recurrence of the arrhythmia. The aim of this study was to assess patient satisfaction in patients with supraventricular tachycardia ...
Brooks Anthony G - - 2010
Ablation of long-standing persistent atrial fibrillation (AF) is highly variable, with differing techniques and outcomes. The purpose of this study was to undertake a systematic review of the literature with regard to the impact of ablation technique on the outcomes of long-standing persistent AF ablation. A systematic search of the ...
Tamborero David - - 2010
The best method for performing atrial fibrillation (AF) ablation is still under debate. The importance of using a circular mapping (CM) catheter for assessing isolation of the pulmonary vein (PV) antrum on the outcome of the procedure has not been clearly established. The purpose of this study was to evaluate ...
Neumann Thomas - - 2010
PURPOSE: Multi-electrode circumferential mapping catheters have been developed by several manufacturers to facilitate catheter ablation procedures for atrial fibrillation (AF). We tested the effectiveness and safety of a conventional, fully endocardial electrogram-guided circumferential antrum isolation (PVI) with a novel mapping device. METHODS: The study enrolled 250 consecutive patients with paroxysmal ...
Matsuo Seiichiro - - 2010
AIMS: Although cavotricuspid isthmus (CTI) ablation can cure typical atrial flutter (AFL), it might be difficult to achieve a bidirectional conduction block in the isthmus in some patients. We investigated the usefulness of a steerable sheath for CTI ablation in patients with typical AFL or atrial fibrillation. METHODS AND RESULTS: ...
dos Santos Ricardo S - - 2010
OBJECTIVE: Radiofrequency ablation for Barrett's esophagus in combination with an antireflux procedure has not been widely documented. We report our initial experience with radiofrequency ablation in association with antireflux procedure for Barrett's metaplasia and low-grade dysplasia. METHODS: A total of 14 patients (10 male and 4 female patients) presented with ...
Mylona Sophia - - 2010
OBJECTIVE: To evaluate the efficacy of computed tomography (CT)-guided radiofrequency (RF) ablation for the treatment of osteoid osteomas in common and in technically challenging locations. MATERIALS AND METHODS: Twenty-three patients with osteoid osteomas in common (nine cases) and technically challenging [14 cases: intra-articular (n = 7), spinal (n = 5), ...
Heidarsdottir Ragnhildur - - 2010
AIMS: To examine the effect of n-3 polyunsaturated fatty acid (PUFA) treatment on the incidence of post-operative atrial fibrillation (POAF). METHODS AND RESULTS: A prospective, randomized, double-blinded, placebo-controlled trial was conducted in patients admitted for coronary artery bypass grafting and/or valvular repair surgery. The patients received either n-3 PUFA capsules, ...
Arribas Fernando - - 2010
AIMS: To assess the performance of AF-QoL, a quality of life questionnaire for patients with atrial fibrillation (AF). METHODS AND RESULTS: Observational, prospective, multicentre study in 29 Spanish centres. Three patients' groups were identified at baseline visit: AF patients receiving a new therapeutic intervention according to physician criteria (intervention group); ...
Wang William - - 2010
Success of the modified maze procedure after valvular operation with giant atria and permanent atrial fibrillation (AF) remains suboptimal. We report an aggressive approach for these patients utilizing biatrial reduction plasty with a reef imbricate suture technique concomitantly with valvular and maze procedure for AF. From January 1999 to December ...
Chierchia Gian Battista - - 2010
AIMS: Atrial fibrillation (AF) ablation is increasingly being performed in electrophysiology laboratories. Pericardial effusion (PE) is certainly one of the most frequently observed complications during AF ablation. The aim of our study was to investigate the incidence and outcome of PE following cryothermal energy balloon ablation (CBA) in comparison with ...
Ko Heung Kyu - - 2011
To compare the efficiency of radiofrequency ablation (RFA) using the newly designed flexible laparoscopic radiofrequency electrode and the internally cooled needle electrode for creating an ablation zone in ex vivo and in vivo porcine livers. In the ex vivo ablation zone, 40 ablation areas were created using the flexible electrode ...
Lin Yenn-Jiang - - 2010
Previous studies have reported that increased high-sensitive C-reactive protein (hs-CRP) levels are associated with an inflammatory state. This study investigated the association among hs-CRP, substrate properties, and long-term clinical outcomes after catheter ablation of atrial fibrillation (AF). A total of 137 patients with AF (54 +/- 13 years) who underwent ...
Knecht S?bastien - - 2010
BACKGROUND: Theoretically, the use of electroanatomical mapping systems may reduce radiation exposure, while three-dimensional rotational atriography (3DATG) may increase exposure. Anatomical representation and image registration using 3DATG are likely to be superior, but the net clinical benefit of either system is unknown. OBJECTIVE: The purpose of this prospective randomized two-center ...
Van Beeumen Katarina - - 2010
AIMS: The effect of circumferential pulmonary vein isolation (CPVI) on P-wave characteristics is not clear. We used the signal-averaged (SA) electrocardiogram (ECG) and the ECG derived vector cardiogram (dVCG) to study the influence of CPVI on P-wave duration (PWD) and P-wave area (PWA) and studied whether changes were associated with ...
Xue Y Z - - 2010
Atrial fibrillation (AF) is the most common cardiac arrhythmia with a prevalence of up to 10% in patients who are 80 years and older. There has been some significant progress in the understanding and management of AF in recent years. Large-scale clinical trials have provided solid evidence in supporting the ...
Wieczorek Marcus - - 2010
BACKGROUND: The electrical disconnection of the pulmonary veins (PV) plays an important role in the ablation strategy of paroxysmal atrial fibrillation (PAF). Circumferential antral ablation with a conventional ablation technique using a steerable ablation catheter is sometimes difficult to perform and does not always result in isolation of the targeted ...
Osmancik Pavel - - 2010
Increased apoptotic processes in tissue samples from hearts in atrial fibrillation (AF) have been previously documented in animals. Whether the restoration of sinus rhythm is associated with decreased apoptosis is not known. The aim of the present study was to establish whether successful epicardial ablation of AF leads to changes ...
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