Search Results
Results 301 - 350 of 1858
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Chilukuri Karuna - - 2010
BACKGROUND: Obesity and obstructive sleep apnea (OSA) have a strong association with atrial fibrillation (AF). The purpose of this study was to prospectively determine the effects of obesity, assessed by the body mass index (BMI) and OSA on the efficacy of catheter ablation of AF. METHODS: The patient population consisted ...
Smelley Matthew P - - 2010
INTRODUCTION: The purpose of this study was to determine the safety and efficacy of using a novel radiofrequency (RF) powered transseptal needle to perform transseptal puncture (TSP). METHODS: TSP was performed in 35 consecutive patients undergoing left-sided catheter ablation (mean age = 51 years; male = 71%) using a RF ...
Van Breugel H N A M - - 2010
INTRODUCTION: This is a multicenter, prospective, randomized controlled trial to determine the effect of add-on arrhythmia surgery on health-related quality of life during 1-year follow-up of cardiac surgery patients with atrial fibrillation. METHODS: 150 patients with documented atrial fibrillation were randomly assigned to undergo cardiac surgery with or without add-on ...
De Greef Yves - - 2010
PURPOSE: To identify procedural parameters predicting recurrence of atrial fibrillation (AF) after a first circumferential pulmonary vein isolation (CPVI). METHODS: One hundred seventy-one patients undergoing CARTO-guided CPVI for recurrent AF with a left atrial (LA) diameter <45 mm were studied. Follow-up (symptoms and 7-day Holter) was performed at 1 and ...
Ishida Katsuya - - 2010
BACKGROUND: Terminal P-wave inversion in lead V(1) representing left atrial overload has been considered a precursor of atrial fibrillation (AF). OBJECTIVE: The purpose of this study was to determine whether this P-wave morphologic characteristic can predict the development of AF. METHODS: Digital analysis of 12-lead ECGs was performed to enroll ...
Miyamoto Koji - - 2009
AIMS: It is unclear how the amplitude of bipolar electrogram relates to the local conduction velocity (CV) in patients with atrial fibrillation (AF). For 50 AF patients (paroxysmal/persistent AF: 40/10 patients), contact bipolar voltage maps of the left atrium (LA) were constructed during sinus rhythm using EnSite version 6.0J in ...
Miyazaki Shinsuke - - 2009
AIMS: Bepridil is highly effective in terminating persistent atrial fibrillation (AF). Despite continued treatment, a high rate of AF recurrence after pharmacological cardioversion (PC) with bepridil has been reported. Bepridil therapy is also associated with significant adverse effects. METHODS AND RESULTS: This retrospective case-control study included 82 patients with persistent ...
Wieczorek Marcus - - 2010
BACKGROUND: Electrical disconnection of the pulmonary veins (PV) plays an important role in the ablation of paroxysmal atrial fibrillation (AF). Antral ablation using a conventional steerable ablation catheter often is technically challenging and time consuming. METHODS: Eighty-eight patients (mean age 58 +/- 11 years) with symptomatic paroxysmal AF underwent ablation ...
Nojiri Takashi - - 2010
To evaluate the usefulness of atrial natriuretic peptide (ANP) and brain B-type natriuretic peptide (BNP) for predicting postoperative atrial fibrillation (AF), we determined the changes in perioperative ANP and BNP levels in patients undergoing pulmonary resection for lung cancer. This prospective observational study was conducted during the 10-month period from ...
Ricard Philippe - - 2010
INTRODUCTION: The occurrence of accelerated junctional rhythm (JR) during radiofrequency ablation of the slow pathway in patients with atrioventricular nodal reentrant tachycardia (AVNRT) is frequent. The aim of the present study was to compare the occurrence of JR during magnetic remote catheter ablation to the conventional manual ablation. METHODS AND ...
Arya Arash - - 2010
AIMS: Identifying suitable candidates for circumferential left atrial pulmonary vein ablation (CPVA). CPVA is widely used as an ablation strategy in patients with atrial fibrillation (AF). Understanding the predictors of long-term success of single catheter ablation procedure of AF based on CPVA can help to identify those patients who have ...
Bertaglia Emanuele - - 2010
Aims In the last decade, several approaches to ablating triggers and substrates of atrial fibrillation (AF) have been developed. However, most studies have reported data only on short- or medium-term follow-up. The aim of this study was to investigate whether the 1-year efficacy of catheter ablation for AF is predictive ...
Bunch T Jared - - 2010
BACKGROUND: Radiofrequency ablation is an effective treatment for atrial fibrillation (AF). With improved safety, the therapy has been offered to increasingly older populations. Arrhythmia mechanisms, medical comorbidities, and safety may vary in the very elderly population. METHODS: Patients presenting for AF ablation were divided into two groups [> or =80 ...
Onorati Francesco - - 2009
BACKGROUND AND AIM OF THE STUDY: Enlarged (> 50 mm) atria, longstanding (> 5 years) persistent atrial fibrillation (AF) and age > 70 years are considered predictive of recurrent AF following surgical ablation. The electrophysiological and clinical outcome after AF-ablation was evaluated in high-risk patients undergoing concomitant procedures. METHODS: Between ...
Al-Khatib Sana M - - 2009
BACKGROUND: Current practice related to the management of atrial fibrillation (AF) complicating coronary artery bypass grafting (CABG) is uncertain. METHODS: We examined management of post-CABG AF in the PREVENT-IV trial, and we explored patterns of use of postoperative rhythm versus rate control and anticoagulation for AF by geographic region and ...
Groenveld Hessel F - - 2009
BACKGROUND: Large trials have demonstrated that rate control is an acceptable alternative for rhythm control. However, optimal heart rate during atrial fibrillation (AF) remains unknown. Aim of this analysis was to compare outcome between rate control > or =80 and <80 beat/min in patients with persistent atrial fibrillation. METHODS: In ...
Venkatesan Aradhana M - - 2009
In the present report on the preliminary safety and effectiveness of radiofrequency (RF) ablation for pheochromocytoma metastases, seven metastases were treated in six patients (mean size, 3.4 cm; range, 2.2-6 cm). alpha- and beta-adrenergic and catecholamine synthesis inhibition and intraprocedural anesthesia monitoring were used. Safety was assessed by recording ablation-related ...
Melo Sissy Lara de - - 2009
BACKGROUND: The occurrence of atrial fibrillation (AF) after successful ablation of cavotricuspid isthmus-dependent atrial flutter (CTI-AFL) is an important medical event, but predictors of this event are still controversial. OBJECTIVE: To determine the incidence of AF and its predictors in patients undergoing ablation of cavotricuspid isthmus-dependent atrial flutter (CTI-AFL). METHODS: ...
Chevalier Philippe - - 2009
Randomized studies evaluating left atrial radiofrequency ablation (RFA) in patients with persistent atrial fibrillation undergoing mitral valve surgery are scarce and monocentric. To evaluate the efficacy of left atrial RFA concomitant with mitral valve surgery to restore and maintain sinus rhythm. The SAFIR is a multicentre, double-blinded, centrally randomized study ...
Sonne Kai - - 2009
PURPOSE: To report survival rates in patients treated with pulmonary vein antrum isolation (PVAI), atrioventricular junctional ablation (AVJA), and antiarrhythmic and direct current cardioversion (A+DCCV) at 7 years follow-up. METHODS: From February 2002-December 2004, 1,000 consecutive patients underwent PVAI or A+DCCV or AVJA. These patients were matched in a nested ...
Macías Gallego Alfonso - - 2009
INTRODUCTION AND OBJECTIVES: This article reports the findings of the 2008 Spanish Catheter Ablation Registry, as compiled by the Spanish Society of Cardiology Working Group on Electrophysiology and Arrhythmias. METHODS: As in previous years, data were collected in two ways: retrospectively using a standard questionnaire sent to electrophysiology laboratories by ...
Chierchia Gian Battista - - 2009
AIMS: Cryothermal energy balloon ablation (CBA), using cryogenic ablative energy, has proven very effective in producing pulmonary vein (PV) isolation in patients with paroxysmal atrial fibrillation (AF). Adenosine testing after PV isolation has demonstrated to be able to unmask incomplete lesion after radiofrequency (RF) ablation. The aim of our study ...
Chandhok Sheetal - - 2010
INTRODUCTION: There is general agreement on the importance of electrical isolation of antral (including pulmonary vein) myocardium for effective atrial fibrillation (AF) ablation. However, isolation is often impermanent, and return of conduction (RoC) is associated with recrudescent AF. It is generally assumed that the mechanism of RoC is recovery of ...
Yamada Takumi - - 2009
AIMS: This study examined the difference in autonomic modification (AM) and its effect on paroxysmal atrial fibrillation (PAF) recurrence between segmental pulmonary vein isolation (S-PVI) and circumferential PVI (C-PVI). METHODS AND RESULTS: Successful S-PVI or C-PVI with a basket catheter was achieved in 120 consecutive PAF patients. Serial 24 Holter-recordings ...
Kim Sook Kyoung - - 2009
AIMS: Although electrical cardioversion (CV) is effective in restoring sinus rhythm in patients with atrial fibrillation (AF), AF frequently recurs in spite of antiarrhythmic medications. We investigated the predictors of failed CV and AF recurrence after successful CV. METHODS AND RESULTS: In 81 patients (M:F = 63:18, 59.1 +/- 10.5 ...
Cagli Kumral Ergun - - 2009
PURPOSE: The intrinsic atrial vulnerability is proposed as one of the mechanisms of paroxysmal atrial fibrillation (PAF) in Wolff-Parkinson-White (WPW) syndrome. In this study, we examined the early changes in atrial refractoriness and intra- and inter-atrial conduction times after radiofrequency (RF) catheter ablation of accessory pathway (AP). METHODS: Twenty-four consecutive ...
Bartley J - - 2010
INTRODUCTION: Chronic nasopharyngeal infection is rare. To our knowledge, no effective treatment for this condition has previously been described. This report documents our experience of using suction ablation diathermy in this clinical setting. METHOD: We performed a prospective review of four patients aged 23-65 years (two men and two women) ...
Carnl?f Carina - - 2010
BACKGROUND: Atrial fibrillation (AF) is the most common arrhythmia and many AF patients experience a significantly impaired health-related quality of life (HRQOL). AF is also associated with a high risk of stroke and death. Many pharmacologic treatments for AF are ineffective and may have adverse effects. New methods, such as ...
Ji Qiang - - 2009
Atrial fibrillation (AF) after coronary artery bypass grafting (CABG) is still the most common postoperative arrhythmic complication. Previous studies report that patients undergoing preoperative statin therapy had a lower incidence of postoperative AF. This study aimed to assess the effect of preoperative atorvastatin therapy on preventing AF following off-pump CABG ...
Eitel Charlotte - - 2010
BACKGROUND: Pulmonary vein (PV) isolation has become a cornerstone for ablation of atrial fibrillation (AF). Circular mapping catheter (CMC)-guided techniques for detection of lesion gaps are challenging. OBJECTIVE: The present study describes a new concept of circumferential PV ablation aiming at bidirectional conduction block based on simultaneous pacing and ablation ...
Jensen-Urstad Mats - - 2009
AIMS: Cryothermic ablation using a cryoballoon is a novel technique which has been used to treat paroxysmal atrial fibrillation. In this study, we wanted to test this technique to treat focal atrial tachycardias (ATs) from the pulmonary veins (PV). METHODS AND RESULTS: Five patients (four women, one man, mean age ...
Shamiss Yana - - 2009
AIMS: The aim of this study was to assess the safety and efficacy of dofetilide among patients refractory to other anti-arrhythmic drugs (AADs) and accepted for atrial fibrillation (AF) ablation. METHODS AND RESULTS: One hundred and twenty-seven of 454 patients (69% male, 58% paroxysmal, age 60 +/- 10 years, AF ...
Machino Takeshi - - 2010
BACKGROUND: The rhythm control of atrial fibrillation (AF) associated with mitral stenosis (MS) is often difficult using antiarrhythmic drugs (AADs), even after a percutaneous transvenous mitral commissurotomy (PTMC). Few studies have examined the efficacy and safety of simultaneously performing radiofrequency catheter ablation (RFCA) and a PTMC in patients with MS ...
Scharf Christoph - - 2009
OBJECTIVES: The purpose of this study was to assess the efficacy and safety of a novel, multielectrode, duty-cycled radiofrequency ablation (RFA) system for long-standing persistent atrial fibrillation (AF). BACKGROUND: RFA for persistent AF remains a lengthy and challenging procedure. METHODS: In 5 European centers, 50 patients with long-standing persistent AF ...
Klinkenberg Theo J - - 2009
AIMS: Transvenous pulmonary vein isolation (PVI) is the cornerstone of non-pharmacological rhythm control therapy in symptomatic atrial fibrillation (AF). Success and complications rates are, however, still not optimal. New techniques and energy sources are therefore being developed. METHODS AND RESULTS: Fifteen patients with lone AF refractory for antiarrhythmic drugs (AADs) ...
Matsuo Seiichiro - - 2010
Peri-mitral atrial flutter (PMFL) is commonly encountered in patients undergoing atrial fibrillation (AF) ablation. The purpose of this study was to determine the electrophysiologic characteristics, procedural success, and medium-term outcomes in patients with PMFL. The study consisted of 50 consecutive patients (45 men and 5 women, age 57 +/- 12 ...
Awan Zahid Aslam - - 2009
Drug therapy is mostly employed in the management of supraventricular tachycardias (SVTs). However, radiofrequency catheter ablation has been found to be highly effective and safe in the treatment of SVTs. The current study is aimed at sharing our experience of 320 patients who presented with SVTs, and were treated with ...
Bevilacqua Stefano - - 2009
PURPOSE: The Cobra Adhere XL (Estech, San Ramon, CA) is a multiple-electrode, temperature-controlled, monopolar radiofrequency probe with a vacuum-assisted stabilization system. We evaluated this new technology for epicardial ablation of atrial fibrillation in mitral valve patients through a right mini-thoracotomy. DESCRIPTION: Between June and August 2008, 12 patients underwent minimal ...
De Greef Yves - - 2009
BACKGROUND: Pulmonary vein isolation (PVI) is usually performed with multiple point-by-point radiofrequency ablation with a second multielectrode circular mapping catheter to validate isolation. We evaluated a 30-mm high-density mesh electrode (HDMA) for mapping and PVI in patients with recurrent atrial fibrillation (AF). METHODS: In 13 patients (validation group) up to ...
Ninomiya Yuichi - - 2009
BACKGROUND: Although reconduction after pulmonary vein (PV) isolation is considered to play a key role in the recurrence of paroxysmal atrial fibrillation (AF), there have been few reports regarding the precise time course of early reconduction. Several studies have suggested that transient PV reconduction facilitated by adenosine may predict long-term ...
Schoonover Jeffery P - - 2009
Discuss minimally invasive procedures with patients considering surgery for treatment of chronic venous insufficiency. Thermal ablation, in particular, has higher success rates than vein stripping. Consider endovenous chemical ablation for treatment of tortuous saphenous tributary varicosities that cannot be treated with thermal ablation. Foamed sclerosant, injected under ultrasound guidance, allows ...
Khaykin Yaariv - - 2009
BACKGROUND: The study was conducted to compare relative safety and efficacy of pulmonary vein antrum isolation (PVAI) using intracardiac echocardiographic guidance and circumferential pulmonary vein ablation (CPVA) for atrial fibrillation (AF) using radiofrequency energy. METHODS AND RESULTS: Sixty patients (81% men; 81% paroxysmal; age, 56+/-8 years) failing 2+/-1 antiarrhythmic drugs ...
Li Yue - - 2009
PURPOSE: This study was designed to evaluate the effects of a calpain inhibitor on cardiac muscle apoptosis in rapid pacing canine atrial fibrillation (AF) models. METHODS: Twenty one dogs were divided into three groups: a sham operation group, a control AF group and a calpain inhibitor group. Sustained AF was ...
Akbarzadeh F - - 2009
This study was aimed to compare the results of post operative biatrial pacing and i.v. amiodarone in prevention of AF. In a single blind randomized clinical trial, 210 patients scheduled for elective CABG surgery were randomized either to receive overdrive biatrial pacing, i.v. amiodarone or no intervention. Incidence of AF ...
Dagres Nikolaos - - 2009
Catheter ablation provides curative treatment for atrial fibrillation (AF). Data on anticoagulation after the procedure are sparse. We investigated real-life antithrombotic treatment after AF ablation and examined its adherence to current recommendations. Eight hundred forty-four patients (age 58 + or - 10 years) underwent AF ablation. Most patients had a ...
Tan E S - - 2009
Aim. To investigate long-term outcome and to determine predictors of successful pulmonary vein isolation (PVI) in patients with symptomatic paroxysmal or persistent atrial fibrillation (AF) who are refractory or intolerant to antiarrhythmic drugs.Background. The treatment of AF has traditionally been pharmacological aimed at rate or rhythm control. However, rhythm control ...
Xia Wei - - 2009
BACKGROUND: High levels of asymmetric dimethylarginine (ADMA) are associated with an increased risk of early recurrence of atrial fibrillation (AF) after electrical cardioversion. We aimed to investigate the effects of rosuvastatin on serum ADMA levels and early recurrence of AF following successful electrical cardioversion. METHODS: A total of 64 patients ...
Fishberger Steven B - - 2010
BACKGROUND: Radiofrequency catheter ablation of atrioventricular nodal reentrant tachycardia (AVNRT) has proven to be an effective therapy in the pediatric population. However, concerns of inadvertent permanent AV nodal block have resulted in many pediatric programs adopting cryoablation as their primary ablation approach for AVNRT. METHODS: A retrospective analysis of the ...
Steven Daniel - - 2010
BACKGROUND: Recently, a nonmagnetic robotic navigation system (RN, Hansen-Sensei) has been introduced for remote catheter manipulation. OBJECTIVE: To investigate the influence of RN combined with intuitive 3-dimensional mapping on the fluoroscopy exposure to operator and patient during pulmonary vein isolation (PVI) for paroxysmal atrial fibrillation (PAF) in a prospective randomized ...
De Ponti Roberto - - 2010
INTRODUCTION: Ablation of macroreentrant atrial tachycardia (MRAT) is demanding and identification of predictors of failure may be of help in patient management. This study compares the characteristics of successfully versus unsuccessfully treated patients undergoing electroanatomic mapping (EAM) and ablation of MRAT. METHODS AND RESULTS: Consecutive patients undergoing EAM and ablation ...
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