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Giannessi Daniela - - 2010
Radiofrequency (RF) ablation of arrhythmias induces myocardial damage and release of biomarkers. This study aimed to assess the kinetics of heart-type fatty acid-binding protein (h-FABP), a cytosolic protein released after myocardial injury incurred by both atrial and ventricular RF ablation, compared to other markers of myocardial injury. h-FABP, cTnI, CK-MB(mass) ...
Uusimaa Paavo - - 2010
Kawasaki disease (KD) is an acute vasculitis involving all blood vessels with frequent cardiovascular complications. We describe a 28-year-old patient with childhood KD having coronary complications at the age of 17 now presenting with sustained atrial tachycardia. Electrophysiological study and catheter ablation were performed. Electrophysiological study revealed a left atrial ...
Yokokawa Miki - - 2010
Ablation of arrhythmias arising from the papillary muscles (PAPs) is challenging. The purpose of this study was to assess the predictors of successful catheter ablation in patients with ventricular arrhythmias arising from the PAPs. Forty consecutive patients (15 women, mean age 51 ± 14 years, left ventricular ejection fraction 0.46 ...
Camlar Mahmut - - 2011
Shunt obstruction is the most common shunt complication. In 2003, Kehler et al. used peel-away sheath while implanting the ventricular catheter in 20 patients. They found less revision rate in the peel-away sheath group. We aimed to test the efficacy of this technique in cadavers. We used 100 fresh brains ...
Yamada Takumi - - 2010
Idiopathic ventricular arrhythmias (VAs) can originate from the left ventricular papillary muscles (PAMs). This study investigated the electrophysiological characteristics of these VAs and their relevance for the results of catheter ablation. We studied 19 patients who underwent successful catheter ablation of idiopathic VAs originating from the anterior (n=7) and posterior ...
Anguera Ignasi - - 2010
Sinus node bradycardia or sinus node arrest is a documented phenomenon during radiofrequency catheter ablation. In addition, sinus node inhibition during ventricular pacing has been described as an infrequent occurrence in the course of diagnostic electrophysiology studies. The proposed mechanism in both situations is intense stimulation of vagal afferent pathways ...
Saba Magdi M - - 2011
Idiopathic ventricular fibrillation (VF) is defined as spontaneous VF in the absence of structural heart disease. No prior reports exist addressing the technical aspects of idiopathic VF ablation in a child. We present the case of a 10-year-old boy with idiopathic VF, who presented a unique management challenge, particularly as ...
Kettering Klaus - - 2010
Catheter ablation is of growing importance in patients with an ischemic cardiomyopathy and recurrent episodes of ventricular tachyarrhythmias. Most ablation strategies in these patients are based on the detection of areas of scar and border zones to normal myocardium. However, the mapping criteria for identifying these areas have not been ...
Uçar Ozgül - - 2010
A 52-year-old man with left atrial tachycardia underwent radiofrequency catheter ablation. A steerable 4-mm-tip ablation catheter was advanced into the left atrium through a patent foramen ovale without transseptal puncture. However, the tip of the catheter was stuck in a structure. A pull-back maneuver rendered the catheter free and the ...
Sánchez-Quintana Damián - - 2010
The development of ablation techniques for supraventricular arrhythmias in patients with Ebstein's anomaly have led to a need for better understanding of the morphology of the triangle of Koch and the position of the atrioventricular (AV) node in this structure. The study involved 17 human hearts: 11 with Ebstein's anomaly ...
Nakahara Shiro - - 2010
The purpose of this study was to compare the characteristics and prevalence of late potentials (LP) in patients with nonischemic cardiomyopathy (NICM) and ischemic cardiomyopathy (ICM) etiologies and evaluate their value as targets for catheter ablation. LP are frequently found in post-myocardial infarction scars and are useful ablation targets. The ...
Shin Woo Seung - - 2010
In radiofrequency (RF) ablation for idiopathic left ventricular tachycardia (ILVT), the termination of tachycardia during RF ablation is considered a hallmark of success. However, in cases of patients with difficulty of induction of ventricular tachycardia (VT), the evaluation of procedural success can be problematic. We have observed thermal responses reflected ...
Thomas Vincent - - 2010
Epicardial catheter ablation has been demonstrated to be safe and effective in adults, but there are limited reports in the pediatric population. We report the epicardial ablation of an incessant, hemodynamically compromising ventricular tachycardia in a 13-month-old patient on venoarterial extracorporeal membrane oxygenation. The procedure resulted in elimination of tachycardia ...
Banchs Javier E - - 2010
With the availability of catheter ablation for the elimination of complex cardiac arrhythmias, new imaging tools have enhanced the safety and efficacy of procedures performed in the electrophysiology laboratory. We review the use of intracardiac ultrasound (ICE) as the modality that allows real-time monitoring and reconstruction of cardiac anatomy. Practical ...
Houmsse Mahmoud - - 2011
Frequent ventricular ectopy is often the cause of debilitating symptoms, even in the absence of structural heart disease or malignant ventricular arrhythmias. Mapping and ablation technology has evolved to offer permanent elimination of the ventricular ectopy as a means to manage symptoms. The majority of idiopathic ventricular ectopy originate from ...
Jiang Chen-Xi - - 2010
BACKGROUND: This study aims to describe significant left atrial appendage activation following ablation of persistent atrial fibrillation, and explore its relationship with aggressive septal ablation. METHODS AND RESULTS: Significant left atrial appendage activation delay was found in 23 out of 201 patients undergoing persistent atrial fibrillation ablation. Of them, 14 ...
Chalupka Andrew N - - 2010
Radiofrequency catheter ablation can lead to improvements in morbidity and mortality rates and quality of life for individuals with atrial fibrillation.
Bloch Thomsen Poul Erik - - 2010
Discrete, fragmented, local voltage potentials (LVPs) have been observed in electrograms recorded at the ablation site in patients undergoing radiofrequency ablation for arrhythmias originating in both the right and left ventricular outflow tract; however, the incidence and the significance of the LVP with respect to arrhythmogenesis is uncertain. We studied ...
Baman Timir S - - 2010
The prevalence of epicardial idiopathic ventricular arrhythmias that can be ablated from within the coronary venous system (CVS) has not been described. In a consecutive group of 189 patients with idiopathic ventricular arrhythmias referred for ablation, the site of origin (SOO) of ventricular tachycardia and/or premature ventricular contractions was determined ...
Arruda Mauricio - - 2010
Ventricular tachycardia associated with prior myocardial infarction account for significant morbidity, mortality, and health care costs despite the favorable outcomes shown by ICD clinical trials. Catheter ablation has been increasingly used as an adjunctive therapy in the management of scar-related ventricular tachycardia. Novel technologies have facilitated the outcomes of current ...
Fishberger Steven B - - 2010
Late sequelea following a Mustard operation for transposition of the great arteries (TGA) include atrial arrhythmias and dysfunction of the systemic right ventricle. Catheter mapping and ablation of atrial tachycardia in the setting of significant right ventricular dysfunction may result in hemodynamic compromise. We report the novel use of the ...
Ning Man - - 2010
We report a case of left atrium electrical isolation occurring during the procedure of percutaneous transcatheter ablation of atrial fibrillation (AF). After completion of circumferential pulmonary vein ablation (CPVA) and linear ablation, the septal areas were critically ablated for complex fractionated atrial electrograms (CFAEs). The lesions on the septum together ...
Pouliopoulos Jim - - 2010
AIMS: Identification of arrhythmogenic scar using non-contact (NC) sinus rhythm (SR) mapping is limited. Dynamic substrate mapping (DSM) overcomes these limitations but is less accurate than plunge needle electrode mapping. We developed a revised method for calculating DSM which was validated using detailed histological analysis and compared with conventional mapping ...
Tebbenjohanns Jürgen - - 2010
Emergency catheter ablation is justified in critical patients with drug-refractory life-threatening arrhythmias. The procedure can be used for ablation of an accessory pathway in preexcitation syndrome with high risk of ventricular fibrillation and in patients with shock due to ischemic cardiomyopathy and incessant ventricular tachycardia. Emergency catheter ablation can also ...
Raatikainen M J Pekka - - 2010
A 38-year-old man with history of unsuccessful catheter ablation of paraseptal accessory pathway (AP) and cardiac arrest was referred for reablation. Coronary sinus (CS) venography and detailed three-dimensional electroanatomical mapping demonstrated a large diverticulum near the CS ostium. A single radiofrequency ablation at the neck of the diverticulum eliminated conduction ...
Werner Jacob - - 2010
Over 2.2 million Americans suffer from atrial fibrillation making it one of the most common arrhythmias. Cardiac ablation has shown a high rate of success in treating paroxysmal atrial fibrillation. Prevailing modalities for this treatment are catheter based radio-frequency ablation or surgery. However, there is measurable morbidity and significant costs ...
Guzzo Gonzalo - - 2010
Endocardial electro-anatomic reconstruction of the left atrium and activation mapping defined a very large atrial accessory pathway insertion with a previously failed ablation attempt. Radiofrequency application inside the coronary sinus (CS), at a site with a sharp electrogram bridging atrial and ventricular electrograms abolished pathway conduction. The myocardium in the ...
Yokokawa Miki - - 2010
A 76-year-old man with a history of atrial septal defect repair underwent radiofrequency (RF) ablation of typical atrial flutter. During electrophysiological study, incessant sharp potentials were recorded, originating from the ostium of the inferior vena cava (IVC), and dissociated from atrial activity. During sinus rhythm, these potentials propagated to the ...
Raczka Franck - - 2010
We describe the case of a young man suffering from incessant ventricular tachycardia and a chronic apical left ventricular thrombus. We performed radiofrequency ablation of this tachycardia emerging from the border zone of the septoapical anevrism, near the apical thrombus. We used Cartosound system to avoid manipulation of catheter in ...
Ko Jae K - - 2010
A 2-month-old baby was resuscitated from ventricular fibrillation attributed to a concurrent chaotic atrial tachycardia with Wolff-Parkinson-White syndrome. He underwent successful radiofrequency catheter ablation of an accessory pathway. Throughout the 4-year follow-up after the procedure, the boy remained free of any drugs, was in sinus rhythm without ventricular pre-excitation and ...
Huo Yan - - 2010
A 41-year-old woman with recurrent wide-QRS tachycardia is reported. Electrophysiologic findings were consistent with the diagnosis of a preexcited atrioventricular nodal reentrant tachycardia due to a bystander nodo-ventricular fiber. However, slow pathway ablation did not preclude tachycardia recurrence. A second electrophysiology study shed light on the correct mechanism and eventually ...
Santilli Roberto A - - 2010
Two dogs were presented for episodic weakness caused by a very rapid supraventricular tachycardia with a ventricular rate of 360 bpm and 300 bpm, respectively. Electrocardiography showed narrow QRS complex tachycardia in both subjects, the first one with a fixed 2:1 atrioventricular block, and the second with variable degrees of ...
Milicevic Goran - - 2010
Postsystolic contraction and other forms of phenomenon of multiple myocardial contractions are characterised by secondary or even tertiary contraction that follow regular one during each single cardiac cycle, triggered by a single sinus node impulse. These additional contractions occur at circumscribed areas of different myocardial regions, in many cardiac patients ...
Montanez Alicia - - 2010
Radiofrequency ablation for symptomatic, drug refractory premature ventricular contractions has been well established as a treatment modality. Mapping of ventricular ectopy that arises near the native conduction system can be challenging. We report a case of fascicular ectopy arising from the proximal His (H)-Purkinje system that was successfully mapped and ...
Hsieh Calvin H C - - 2010
Percutaneous approaches for radiofrequency ablation of ventricular tachycardia (VT) in the left ventricle are typically transarterial retro-aortic, antegrade transmitral via an interatrial septal puncture, or epicardial. However, all 3 approaches may be contraindicated in certain cases. We describe 2 cases of VT ablation in which aortic and mitral valve replacements ...
Arbelo Elena - - 2010
Arrhythmogenic right ventricular dysplasia (ARVD) is a genetically determined myocardial disease characterized by fibrofatty replacement of the right ventricular wall. Ventricular tachyarrhythmias can be seen in the early stages of the disease, which is one of the most important causes of sudden death in young healthy individuals. Radiofrequency (RF) catheter ...
Lu Zhibing - - 2010
OBJECTIVE: This report is intended to provide an overview of the mechanism(s) of ventricular fibrillation (VF) and its relation to catheter ablation. METHODS AND RESULT: We conducted a Pubmed and Medline literature search to identify all experimental and clinical studies published in English involving the mechanisms of VF and catheter ...
Crawford Thomas - - 2010
Premature ventricular complexes (PVCs) and ventricular tachycardia (VT) with origin in the left ventricular papillary muscle have recently been described. There are no prior studies describing the characteristics of the ventricular arrhythmias (VAs) arising from the right ventricular papillary muscles (RV PAPs). Among 169 consecutive patients who underwent a catheter ...
Mykytsey Andrew - - 2010
Right coronary artery (RCA) occlusion and acute myocardial infarction are rare during radiofrequency (RF) ablation of the cavotricuspid isthmus. Ventricular fibrillation (VF) or cardiac arrest in the periprocedural period may be the initial or only clinical manifestation. Septal or lateral RF delivery may increase the risk. We report 2 cases ...
Voeller Rochus K RK Division of Cardiothoracic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St Louis, MO 63110, - - 2010
Over recent years, a variety of energy sources have been used to replace the traditional incisions of the Cox maze procedure for the surgical treatment of atrial fibrillation. This study evaluated the safety and efficacy of a new bipolar radiofrequency ablation device for atrial ablation in a long-term porcine model. ...
Kanter Ronald J - - 2010
Tachyarrhythmias occur in patients having congenital heart disease most commonly related to surgically created or naturally occurring conduction obstacles, and to postoperative hemodynamic effects on cardiac muscle. Less frequently, the underlying disease is associated with tachycardia substrates. Thorough knowledge of the patient's congenital anatomy and surgical procedures is required before ...
Steven Daniel - - 2010
Mapping and ablation of atrial tachycardias (ATs) secondary to catheter ablation of atrial fibrillation (AF) is often challenging due to the complex atrial substrate, different AT mechanisms, and potential origin not only in the left atrium (LA) but also from the right atrium (RA) and the adjacent thoracic veins. This ...
Shah Ashok J - - 2010
The occurrence of atrial tachycardias (AT) is a direct function of the volume of atrial tissue ablated in the patients with atrial fibrillation (AF). Thus, the incidence of AT is highest in persistent AF patients undergoing stepwise ablation using the strategic combination of pulmonary vein isolation, electrogram based ablation and ...
Olgun Hasim - - 2010
INTRODUCTION: Radiofrequency catheter ablation (RFCA) is a safe and effective treatment option for children with refractory supraventricular tachycardias. RFCA of right-sided accessory pathways (APs) continues to be challenging, resulting in lower success rates and higher recurrence rates. One of the reasons for a prolonged or failed procedure is mapping error ...
Lábrová R - - 2010
Beside heart failure and metabolic syndrome, atrial fibrillation is termed the cardiovascular epidemic of the twenty-first century. Its increased morbidity and mortality is alarming. The present, most effective therapy of atrial fibrillation is catheter ablation. Successful ablation of atrial fibrillation prevents the occurrence and progression of electrical, structural and mechanic ...
Rausch Christopher M - - 2010
Anatomic displacement of the atrioventricular node and associated conduction tissue in atrioventricular septal defects has been previously described. In spite of the increasing use of cryothermal catheter ablation in the pediatric population, there remains very little literature regarding its use in congenital heart disease. We describe successful cryothermal modification of ...
Sivagangabalan Gopal - - 2010
INTRODUCTION: Post infarct ventricular tachycardia (VT) often involves the interventricular septum (IVS) and requires transmural septal ablation. The purpose of this study was to compare the efficacy of bipolar ablation (BIA) versus sequential unipolar ablation (SUA) in creating a transmural ablation line along the IVS scar border. METHODS AND RESULTS: ...
Yamabe Hiroshige - - 2010
A 15-year-old boy without structural heart disease was admitted for the treatment of frequent episodes of premature ventricular contractions (PVCs). Left ventricular mapping revealed that the origin of PVC was at the posterior papillary muscle. Diastolic small potentials were observed during sinus rhythm with a constant interval following QRS beats. ...
Yang S-G - - 2010
Monophasic action potential (MAP) recording plays an important role in a more direct view of human myocardial electrophysiology under both physiological and pathological conditions. The procedure of MAP measuring can be simply performed using the Seldinger technique, when MAP catheter is inserted through femoral vein into the right ventricle or ...
Khachatryan Tigran - - 2010
Coronary Arteriovenous Malformations (AVM) can lead to various cardiovascular events. The severity of clinical manifestation depends on the degree of the malformation. The significance of major arterial shunt is that they can deprive the myocardium of the necessary amount of blood, leading to myocardial ischemia, and potentially tachycardia, left ventricular ...
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