Search Results
Results 351 - 400 of 1636
< 3 4 5 6 7 8 9 10 11 12 13 >
Schwagten B - - 2009
A baffle puncture is a challenging procedure but can be safely done using direct visualization of the region of interest. To our knowledge, however, it has never been performed in a patient with dextrocardia. We present a 62-year-old male with dextrocardia, right isomerism, congenitally corrected transposition of the great arteries, ...
Müller Hajo - - 2008
AIMS: Reports using two-dimensional echocardiography have indicated that radiofrequency catheter ablation (RFCA) for atrial fibrillation (AF) results in a reduction in the left atrial (LA) size. Furthermore, the effect of pulmonary vein isolation (PVI) on right atrial (RA) anatomical remodelling has not been studied. Three-dimensional echocardiography (3DE) allows us to ...
Walpot Jeroen - - 2008
We describe a patient with oedema of the legs and ascites due to right atrial (RA) inflow obstruction, caused by atrial septal aneurysm (ASA) and an elongated Eustachian valve (EV). Both structural abnormalities created a narrow inflow channel to the free RA cavity. RA inflow obstruction is usually related to ...
Matsuo Seiichiro - - 2008
The case of a 65-year-old man with recurrent atrial fibrillation after undergoing segmental pulmonary vein isolation caused by the reconnection of previously isolated pulmonary veins is herein reported. Interestingly, frequent ectopic firings in the left superior pulmonary vein conducted to the left atrium, not through its ostium but through the ...
Calò Leonardo - - 2008
INTRODUCTION: The elimination of complex fractionated atrial electrograms (CFAEs) has been proposed as a potential target for guiding successful AF substrate ablation. The possibility to efficiently map the atria and rapidly identify CFAEs sites is necessary, before the CFAEs ablation becomes a routine approach. The aims of this study, conducted ...
Saliba Walid - - 2008
OBJECTIVES: We present the initial clinical human experience with the use of a robotic remote navigation system (Hansen Medical, Mountain View, California), to perform left and right atrial mapping and radiofrequency ablation of atrial fibrillation (AF) and atrial flutter (AFL). BACKGROUND: Catheter ablation is an established curative modality for various ...
Rillig Andreas - - 2008
BACKGROUND: Ablation of the aortic sinus of Valsalva in adults for ectopic atrial tachycardia (EAT) and ventricular tachycardia (VT)/premature ventricular complexes (PVCs) has been reported in only a very few patients. Limited data exist concerning the safety of aortic ablation. OBJECTIVE: The purpose of this study was to confirm aortic ...
Shimamoto Takeshi - - 2008
Treatment of non-ischemic dilated cardiomyopathy (NIDCM) remains a challenge. Morphological left ventricular (LV) restoration such as septal anterior ventricular exclusion (SAVE) can be effective in treating NIDCM; however, residual electrophysiological disorders such as atrioventricular and intraventricular conduction disturbances become apparent in the form of atrial fibrillation (AF) and LV dyssynchrony, ...
Rostock Thomas - - 2008
OBJECTIVES: Our purpose was to investigate the impact of short-lasting atrial fibrillation (AF) on the electrophysiological properties of the atria and pulmonary veins (PVs) in patients devoid of AF. BACKGROUND: The presence of AF is associated with electrical remodeling processes that promote a substrate for arrhythmia maintenance in the atria, ...
Liu Xiao-Ke - - 2008
BACKGROUND: A 51-year-old male was referred for consideration for heart transplantation because of recently diagnosed congestive heart failure refractory to medical therapy. Previous echocardiography demonstrated a left ventricular ejection fraction of approximately 15% with global hypokinesia. Coronary angiography did not reveal any clinically significant obstructive coronary artery disease and an ...
Nakagawa Eiichiro - - 2008
The case of a 41-year-old man with Brugada syndrome (BS) who suffered electrical storms (ES) of ventricular fibrillation (VF) is presented. Although intravenous infusion of isoproterenol (ISP) suppressed the VF occurrence, he consistently experienced recurrence of VF following discontinuation of ISP infusion. Quinidine and cilostazol were ineffective. An analysis of ...
Ibebuogu Uzoma N - - 2008
Atrial fibrillation (AF) is a common arrhythmia seen in clinical practice, and affects more than 4% of the population older than 60 years of age. Peripheral thromboembolism contributes significantly to the observed morbidity and mortality. Symptomatic AF, before cardioversion to normal sinus rhythm, requires either exclusion of atrial thrombi using ...
Pratola Claudio - - 2008
Pulmonary veins (PVs) ablation is a valid treatment option for atrial fibrillation. The standard approach for PVs isolation usually requires two catheters or an electroanatomical reconstruction of the left atrium. We describe our initial experience with a single device for mapping and ablating in a patient referred to our center ...
de la Fuente Anselmo - - 2008
Aneurysm of the left atrial appendage (LAA) is very infrequent. We present the case of 24-year-old man in functional class I with atrial fibrillation but no other symptoms. Radiology showed an abnormality in the outline of the heart. Echocardiography revealed left appendage aneurysm. After median sternotomy, aneurysmectomy was performed under ...
Masroor Saqib - - 2008
OBJECTIVE: The objective of this study was to investigate whether epicardial cryoablation could achieve sufficient endocardial hypothermia to create transmural lesions leading to acute and sustained pulmonary vein isolation in a normothermic beating-heart model. METHODS: Thirty-five- to 45-kg pigs underwent median sternotomy. Epicardial cryoablation was performed on the right ventricle ...
Wright Matthew - - 2008
Curative treatment of atrial fibrillation with catheter ablation is now a legitimate option for a large number of patients. In the last decade a tremendous amount has been discovered about this fascinating arrhythmia, yet there is still much that is understood. A number of different ablation strategies have been used ...
Udyavar Ameya R - - 2008
The success rate of achieving electrical isolation by circumferential pulmonary vein ablation (CPVA) varies from 32% to 88%. We carried out ablation at the pulmonary vein carina to evaluate the elimination rates of the pulmonary vein potentials (PVPs) after one round of CPVA had failed to eliminate all the PVPs ...
Medi Caroline - - 2008
Identification of atypical atrial flutter (AFL) (non-cavo-tricuspid isthmus-dependent) prior to the electrophysiology laboratory is potentially useful because it allows appropriate procedural planning and enables discussion of the likely success rates and risks of the procedure with the patient. Typical counterclockwise AFL has a stereotypic appearance, the electrocardiogram (ECG) is predictive ...
McBane Robert D - - 2008
Although infrequent, embolic occlusion to non-cerebral arteries may result in limb loss, organ failure, and death. The aim of this study was to define clinical and echocardiographic characteristics determining thromboembolism destination in non-valvular atrial fibrillation. An inception cohort of individuals (n=72) were identified with incident peripheral embolism in the setting ...
Ma?ecka Barbara - - 2008
We present a complication of the infected pacing system extraction by lobular pneumonia in a 73-year-old female patient. The pacing system involved DDD pacemaker, atrial and ventricular endocardial leads implanted 12 year beforehand. The defect of the atrial lead emerged during the pacemaker replacement 4 years ago. The diagnosis of ...
Doll Nicolas - - 2008
BACKGROUND: The purpose of this study was to test the feasibility, effectiveness, and safety of the use of a new laser energy catheter for linear endocardial ablation in an acute sheep model. METHODS: Bipolar pacing electrodes were positioned on the left atrial appendage (LAA) and the pulmonary veins (PVs). Laser ...
Nakano Emi - - 2008
A case of reentrant ventricular tachycardia (VT) originating from the right ventricular outflow tract (RVOT) is described. An electrophysiological study revealed that programmed stimulation from the right ventricle apex induced 2 types of VT with similar left bundle branch block configuration and inferior axis. Yet, VT cycle length (CL) was ...
Khairy Paul - - 2008
Hybrid procedures that combine surgical and interventional techniques are increasingly utilized in patients with congenital heart disease. We performed a novel hybrid intervention involving transcatheter ablation via a sternotomy approach and atriotomy incision. A recalcitrant accessory pathway was successfully ablated in a patient with hemodynamically unstable supraventricular tachycardia and an ...
Liang Lei - - 2008
Isolation of the pulmonary vein antrum can terminate atrial fibrillation, but the rationale has not been elucidated. In the present study, we show that sheep atrial effective refractory period (ERP) was heterogeneously shortened by acetylcholine administration. After perfusion with 15 muM acetylcholine, the shortest ERP occurred in the pulmonary vein ...
Johnson Nils P - - 2008
The ladder diagram (also called a laddergram) remains a popular visual aid when graphically representing the mechanism of arrhythmia. It disentangles atrial and ventricular electrical activity and gives explicit representation to the sinoatrial and atrioventricular nodes. More than 100 years after the first published ladder diagrams, this report reviews their ...
Akhtar Saeed - - 2008
PURPOSE: To investigate ultrastructural alterations in the distribution of collagen fibrils (CFs) and proteoglycans (PGs) in the keratoconus cornea. METHODS: Four normal corneas (donor age 24-75 years) and four severe and one mild keratoconus corneas (donor age 24-47 years) were fixed in 2.5% glutaraldehyde containing 0.05% cuprolinic blue dye for ...
Lencioni Mauro - - 2008
A 67-year-old female with symptomatic paroxysmal atrial fibrillation (AF) underwent left atrial circumferential ablation, and during the procedure, she developed AF. Once the ablation was complete, the left upper pulmonary vein (LUPV) appeared to continue in a rapid disorganized rhythm, despite further attempts at isolating this vein. When the patient ...
Lickfett Lars - - 2008
Catheter ablation has emerged as an excellent treatment option for atrial fibrillation especially in patients with paroxysmal AF. Several obstacles however remain regarding ablation strategies for persistent and chronic AF. In this setting, adequate success rates can only be achieved with left atrial ablation in addition to complete PV isolation. ...
Scavee Christophe - - 2008
We report the case of a young woman suffering from a permanent ectopic atrial tachycardia originating from the right superior pulmonary vein and mimicking a sinus tachycardia on the ECG. Using only 2 quadripolar catheters after a transseptal approach, the focus was successfully mapped to the posterior wall of the ...
Imren Y - - 2008
AIM: Temporary epicardial pacing wires (TEPW) which are routinely used after coronary bypass grafting may result in significant complications. We sought to identify variables that predict TEPW implantation and thereby limit their use. METHODS: This prospective study enrolled 564 patients (296 underwent coronary artery bypass grafting with cardiopulmonary bypass [ONCAB] ...
Arimoto Takanori - - 2008
Partial atrial standstill is characterized by the failure of atrial activity either spontaneously or in response to electrical stimulation in restricted site of atria. In this case with bradycardia, atrial standstill was restricted to the lateral and posterior right atrium. The markedly prolonged intraatrial conduction delay was observed in the ...
Huybregts Marinus A J M - - 2008
PURPOSE: Controlled hypothermia of the right atrium has been shown to reduce postoperative atrial fibrillation after on-pump coronary artery bypass grafting. A device has been developed that couples right atrial and nodal cooling with modified dual-stage venous drainage by circulating cold sterile saline through an intracavity, shape-memory balloon. DESCRIPTION: The ...
Chiam Paul T L - - 2008
Stroke is one of the leading causes of mortality, morbidity and serious disability in the developed world. Atrial fibrillation (AF), one of the most common cardiac arrhythmias, is a well-known predisposing factor for stroke, raising the risk significantly. Oral anticoagulation with warfarin is currently the most effective therapy for stroke ...
Skolnick Adam H - - 2008
A 74-year-old woman presented with an acute cerebrovascular infarct involving multiple vascular territories, suggestive of an embolic event. The initial transesophageal images create the impression of an echogenic mass in the left atrial appendage. A small pericardial effusion was also seen surrounding the left atrial appendage. After further views were ...
Matsuo Seiichiro - - 2008
We report a case of a 56-year-old man with paroxysmal atrial fibrillation who underwent segmental, ostial pulmonary vein (PV) isolation while in arrhythmia. During isolation of the left superior PV (LSPV), organized electrical activity was seen within the vein, suggestive of a PV tachycardia with a cycle length of 90 ...
Tang Kai - - 2008
BACKGROUND: CartoXP and CartoMerge have been used to treat atrial fibrillation (AF) for several years. Our randomized prospective study compared clinical outcomes of these two versions of three dimensional electroanatomic mapping system in guiding catheter ablation for paroxysmal atrial fibrillation (PAF). METHODS: Eighty-one patients with symptomatic, drug refractory PAF were ...
Koebe Julia - - 2008
Atrial fibrillation (AF) is the most common sustained arrhythmia in clinical practice. Its prevalence is increasing in our ageing population, and it has a soaring impact on health systems. It can cause thrombo-embolism, heart failure, and hospitalizations, and is associated with a two-fold increase in all-cause mortality. There have been ...
Drewitz Imke - - 2008
Pulmonary veins (PVs) are the predominant sources of paroxysmal atrial fibrillation (AF), and electrical PV isolation has become an established interventional treatment for patients suffering from AF. There are a few cases describing PV tachycardias; however, mechanisms of PV arrhythmogenicity resulting in PV tachycardias remain incompletely understood. We report on ...
Chang Andrew K - - 2008
A 45-year-old man with dilated cardiomyopathy, atrial fibrillation, and hypertension presented to the emergency department with palpitations and shortness of breath for 2 days after running out of his medications. An electrocardiogram disclosed atrial fibrillation with rapid ventricular response. The patient was hemodynamically unstable and failed multiple cardioversion attempts up ...
Clark John - - 2008
BACKGROUND: Newer technologies such as three-dimensional mapping and echocardiography can decrease x-ray exposure during catheter ablation. Many right-sided tachycardias can now be ablated without fluoroscopy. Left-sided tachycardias, however, have not yet been ablated using a zero fluoroscopy approach. OBJECTIVE: This study sought to examine the utility of trans-esophageal echocardiography (TEE) ...
Chen Jian - - 2008
AIMS: The recurrence of atrial fibrillation (AF) after pulmonary vein (PV) isolation is still a challenge. We investigated a new approach to treating AF patients by silencing electrical activity in the posterior inter-pulmonary-vein atrium (PIA). METHODS AND RESULTS: Three ablation steps are required to obtain PIA electrical silence: electrical PV ...
Casella Michela - - 2008
A 65-year-old man was referred for atrial fibrillation ablation to our center. Routine pre-procedure transthoracic and transoesophageal echocardiography and cardiac computed tomography examinations showed a normal interatrial septum and fossa ovalis anatomy. Access to left atrium was initially planned using a conventional transseptal needle puncture. During the procedure, several consecutive ...
Celik Turgay - - 2009
Although all beta blockers appear to be effective in the prevention of postoperative atrial fibrillation (AF) following coronary artery bypass surgery (CABG), carvedilol was found to be much more effective than metoprolol in this respect as the current study clearly delineated. We believe that the ongoing COMPACT trial will answer ...
Pap Róbert - - 2008
INTRODUCTION: While some posteroseptal and left posterior accessory pathways (APs) can be ablated on the tricuspid annulus or within the coronary venous system, others require a left-sided approach. "Fragmented" or double potentials are frequently recorded in the coronary sinus (CS), with a smaller, blunt component from left atrial (LA) myocardium, ...
Iwamoto Shinichiro - - 2008
Hemicelluloses as matrix substances showed an important role in nanofibrillation of wood pulp. Never-dried and once-dried pulps with different amounts of hemicelluloses were fibrillated using a grinding treatment. The degree of fibrillation was evaluated by scanning electron microscopy observation of the fibrillated pulps and light transmittance measurements of the fibrillated ...
Otomo Kiyoshi - - 2008
Adenosine-sensitive reentrant atrial tachycardia (AT) is usually amenable to ablation at the right superoseptum near the His bundle. We report a case with "left-variant" adenosine-sensitive reentrant AT. The AT was reproducibly induced by atrial extrastimulation with negative correlation between the coupling interval and return cycle, and was terminated by atrial ...
Cabrera José Angel - - 2008
AIMS: We examined the left lateral ridge (LLR) between the orifices of the left pulmonary veins and the left atrial appendage for a better understanding of its structural composition relevant to ablations for atrial fibrillation (AF). METHODS AND RESULTS: The LLR and its surrounding areas were studied in 40 heart ...
Freeman William D - - 2008
Warfarin-related intracerebral hemorrhage (WICH) is a medical and neurosurgical emergency with a 1-month mortality of approximately 50%. Warfarin is commonly is used in patients with atrial fibrillation to prevent ischemic stroke and to prevent progression of deep vein thrombosis to pulmonary embolism. Owing to the ageing population, and increased incidence ...
Crowley David I - - 2008
The authors describe the use of Amplatzer occlusion devices to successfully occlude Fontan baffle leaks in three patients. These additional right to left shunts were recognized at the time of elective transcatheter closure of surgically created fenestrations. A common site of baffle leak is described at the base of the ...
Melduni Rowlens M - - 2008
BACKGROUND: Direct-current cardioversion (DCCV) of atrial fibrillation and atrial flutter commonly causes post-DCCV left atrial (LA) stunning (LAS), which may potentiate thromboembolic complications. Data on LAS determinants are inconclusive. METHODS: We prospectively evaluated LA and LA appendage function before and immediately after DCCV of atrial fibrillation and atrial flutter in ...
< 3 4 5 6 7 8 9 10 11 12 13 >