Search Results
Results 401 - 450 of 1640
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Liew Reginald - - 2008
AIMS: Right atrial (RA) tachycardias may involve several mechanisms other than typical isthmus-dependent flutters, particularly in patients with congenital heart disease (CHD) or structural heart disease. We aimed at investigating the clinical utility of non-contact mapping in the diagnosis and ablation of these complex arrhythmias. METHODS AND RESULTS: Non-contact mapping ...
Avari Jennifer N - - 2008
INTRODUCTION: Coronary sinus accessory pathways (CSAPs), atrioventricular connections formed by the coronary sinus myocardial coat, have been described in adult patients, but not systematically described in pediatric patients. METHODS: Patients who underwent CSAP ablation were compared to patients with right posteroseptal (RPS) pathway ablation (control group) from November 2004 to ...
Trajkov I - - 2008
BACKGROUND: Cardiac memory is a phenomenon characterized by transient T-wave abnormalities occurring during normal sinus rhythm, after a period of altered ventricular depolarization, where the T-wave vector has the same direction as the vector of the previously altered QRS complex (T-wave inversion). It is a form of electrical remodelling of ...
Miyake Christina Y - - 2008
BACKGROUND: Supraventricular tachycardia (SVT) is a common tachyarrhythmia among pediatric patients. Usually, non-preexcited SVT is attributable to either atrioventricular nodal reentry tachycardia (AVNRT) or unidirectional retrograde accessory pathway (URAP), but these cannot be differentiated on a baseline electrocardiogram (ECG). The ability to identify the SVT mechanism in children may guide ...
Fujiki Akira - - 2008
AIMS: We assessed responses to slow pathway ablation with respect to the appearance of ventriculoatrial (VA) block during junctional rhythm in both typical and atypical types of atrioventricular nodal re-entrant tachycardia (AVNRT). METHODS AND RESULTS: The 31 subjects included 16 patients with slow-fast type of typical AVNRT and 15 patients ...
Mahlberg Richard - - 2008
Patients with affective disorders have often been reported to experience subjective changes in how they perceive the flow of time. Time reproduction tasks provide information about the memory component of time perception and are thought to remain unaffected by pulse rate disturbances in the pacemaker of the internal clock. In ...
Aryana Arash - - 2008
Fabry disease (FD) is a rare lysosomal storage disease characterized by intracellular deposition of glycosphingolipids that can involve various organs including the heart. Here, we report the finding of a short PR interval in a patient with FD and recurrent syncope associated with short atrial-His (A-H) and His-ventricular (H-V) intervals ...
Herweg Bengt - - 2008
We report two patients with cardiac resynchronization therapy (CRT) devices and evidence of refractory heart failure in whom impaired intraatrial conduction in one patient, and interatrial conduction in the other, prohibited optimization of the atrioventricular (AV) timing sequence. The patient with intraatrial conduction delay exhibited late right atrial sensing and ...
Camilleri M - - 2008
BACKGROUND: A new medical device uses high-frequency electrical algorithms to create intermittent vagal blocking (VBLOC therapy). The aim is to assess the effects of vagal blocking on excess weight loss (EWL), safety, dietary intake, and vagal function. METHODS: An open-label, 3-center study was conducted in obese subjects (body mass index ...
Fored C Michael - - 2008
AIMS: In patients with sinus node disease, dual-chamber pacing (DDD) possibly results in adverse effects on the ventricular function. We have compared the incidence of cardiovascular morbidity and mortality in patients with sinus node disease and with atrioventricular (AV) synchronous pacemakers, DDD vs. atrial pacing (AAI). METHODS AND RESULTS: A ...
Kramoh Euloge Kouadio - - 2008
BACKGROUND: Because of anatomical proximity, closure of paramembranous ventricular septal defect (pm-VSD) with an Amplatzer occluder has the potential to affect the atrioventricular (AV) conduction system. PATIENTS AND METHODS: Electrophysiology studies (EPS) were performed prior to and following closure of the pm-VSD in 19 children aged 8.9 +/- 4.5 years. ...
Ekpe, E E; ;
Background: Symptomatic heart block is a treatable cardiac cause of death which occurs globally. In Nigeria it is increasingly diagnosed and treated with permanent artificial cardiac pacemaker insertion and pulse generator implantation, sometimes after a period of misdiagnosis and inappropriate treatment. Methods: Twenty-three patients who were diagnosed with symptomatic heart ...
Kriatselis Charalampos - - 2008
AIMS: The purpose of this study was to evaluate a retrograde approach for radiofrequency (RF) ablation of ectopic atrial tachycardias (EATs) with an early atrial activation at the His site. METHODS AND RESULTS: This study included 12 patients with EAT. During tachycardia, earliest atrial activation was recorded at the His ...
González-Torrecilla Esteban - - 2008
AIMS: In patients without pre-excitation, the differential diagnosis of paroxysmal atrioventricular (AV) reciprocating tachycardias consists mainly of atrioventricular nodal re-entrant tachycardias (AVNRTs) and AV reciprocating tachycardias (AVRTs) through a concealed bypass. Our purpose was to validate the diagnostic accuracy of a predictive logistic model using classical electrocardiographic (ECG) criteria. METHODS ...
Miller Daniel L - - 2008
BACKGROUND: Compensatory hyperhidrosis (CH) is the most common side effect after a thoracoscopic sympathectomy. The fear of CH is the most common reason why patients do not undergo a sympathectomy, because it is an irreversible procedure unless removal clips are used. Unfortunately, clip removal for reversal of postsympathectomy CH has ...
Xanthos Theodoros - - 2008
STUDY OBJECTIVES: The use of adenosine on failure of vagal maneuvers in patients with paroxysmal supraventricular tachycardia (PSVT) is recommended. The aim of the present study was to identify a possible prognostic index for the efficacy of adenosine in PSVT. METHODS: This retrospective study included 321 patients with PSVT, in ...
Sarkozy Andrea - - 2008
AIMS: Currently used diagnostic manoeuvres at the electrophysiology study do not always allow for consistent identification of atrial tachycardia (AT), either because of inapplicability of the technique or because of low predictive value and specificity. The aim of this study was to determine whether overdrive atrial pacing during paroxysmal supraventricular ...
Kawabata Mihoko - - 2008
AIMS: The purpose of this retrospective study was to assess characteristics of patients who had suffered atrial flutter (AFL) with 1:1 atrioventricular (AV) conduction (1:1 AFL). METHODS AND RESULTS: Subjects were 8 patients (61 +/- 14 years) with documented 1:1 AFL, and 101 AFL patients without a history of 1:1 ...
Church Christopher A - - 2008
OBJECTIVE: The aim of this study was to determine the extent of radiation exposure to the patient and the surgeon in balloon catheter dilation. METHODS: Dosimeters were used to record radiation exposure to both patients and surgeons. The mean radiation dose per sinus treated and per patient treated was calculated ...
Sumitomo Naokata - - 2008
BACKGROUND: This study was performed to investigate the incidence of arrhythmias in patients with Kawasaki disease (KD). METHODS AND RESULTS: Electrophysiologic studies (EPS) were performed in 40 patients (mean age: 10.3+/-5.1 years; 30 males, 10 females) with KD who had severe to moderate coronary artery disease. Clinical arrhythmias were documented ...
Yin J X - - 2008
OBJECTIVES: This study describes the electrophysiologic and electrocardiographic characteristics of focal atrial tachycardia (AT) arising from superior tricuspid annulus in six (1.9%) patients of a consecutive series of 320 patients. METHODS: Six patients (mean age 42 +/- 22 years) with a mean cycle length of 326 ms of a consecutive ...
Adachi Masamitsu - - 2008
AIMS: To compare the risk of atrioventricular (AV) conduction disturbance between patients with sinus node dysfunction on AAI pacing who had a low or high Wenckebach block rate (WBR). METHODS AND RESULTS: Patients with sinus node dysfunction and normal AV conduction those underwent an electrophysiological study were studied. The patients ...
Turfan Murat - - 2008
Atrial flutter (AFL) is a rapid, regular atrial tachyarrhythmia that occurs most commonly in patients with underlying structural heart disease. AFL with 1:1 atrioventricular (AV) conduction is a rare occasion. We describe a 70-year-old male patient with hyperthyroidism in whom AFL was associated with 1:1 AV conduction. This case report ...
Szumowski Lukasz - - 2008
BACKGROUND: Pseudo-Mahaim (AP-M) fibers are a rare variant of atrioventricular (AV) accessory pathways. Atriofascicular and atrioventricular accessory connections are characterized by slow conduction and decremental properties. Dual physiological AV node pathways, slow and fast, are observed in a large number of patients with AP-M. Therefore, there is substrate for AV ...
Meissner Axel - - 2008
OBJECTIVE: The purpose of this first in vivo study was to assess the incidence of thermal influence to the right coronary artery (RCA) during ablation of common type atrial flutter (Aflu) by measuring the fractional flow reserve (FFR) in the vessel before, under and after ablation. METHODS: In thirty three ...
Tischenko Alexander - - 2008
PURPOSE OF REVIEW: Catheter ablation has been proven as very effective and safe therapy for patients with symptomatic Wolff-Parkinson-White (WPW) syndrome. Its application in asymptomatic individuals with WPW pattern remains controversial. This review will elaborate on the role of catheter ablation in symptomatic and asymptomatic patients with WPW pattern on ...
Liberman Leonardo - - 2008
OBJECTIVE: Although supraventricular tachycardia (SVT) can be identified from any lead of the bedside monitor, the mechanism of tachycardia is not always obvious. We analyzed the 12-lead electrocardiogram (ECG) in SVT of pediatric patients with different mechanisms of SVT to determine if there is a consistent optimal lead for rhythm ...
Fukuzawa Koji - - 2008
We investigated the differences in the endocardial substrates between ischemic cardiomyopathy (ICM) and non-ICM (NICM) by using electro-anatomical mapping and pace-mapping. We studied 18 patients (ICM and NICM, 9 each) with monomorphic ventricular tachycardia (VT) documented by 12-leads ECG. Low voltage area was defined by signal amplitude <1.5 mV. A ...
Ekpe E E - - 2008
BACKGROUND: Symptomatic heart block is a treatable cardiac cause of death which occurs globally. In Nigeria it is increasingly diagnosed and treated with permanent artificial cardiac pacemaker insertion and pulse generator implantation, sometimes after a period of misdiagnosis and inappropriate treatment. METHODS: Twenty-three patients who were diagnosed with symptomatic heart ...
Veerareddy Srikar - - 2007
Previous studies have reported gender differences in pacemaker selection. This study aimed to assess gender-related differences in pacemaker mode selection in patients undergoing their first implantation. A retrospective analysis was undertaken from a single-center database of pacemaker implants during the years 2001 to 2003. Univariate and multivariate analyses were used ...
Ali Arif - - 2007
In patients with chronic rhinosinusitis, the presence of maxillary sinus hypoplasia (MSH) may be obscured by extensive mucosal disease or nasal polyposis. Recognition of MSH and its effect on adjacent anatomic structures is of utmost clinical significance in endoscopic sinus surgery. Failure to recognize the impact that MSH has on ...
Arru Giannina - - 2007
We designed a large multicentric study to analyse the presence of MSRV particles in blood and CSF of a large cohort of patients and controls from different European areas. 149 MS patients and 153 neurological and healthy controls were selected from Sardinia, Spain, Northern-Italy and Sweden. To avoid biological and ...
Das Saumya - - 2008
INTRODUCTION: Atrial tachycardias (AT) originating from the anteroseptal region of the aortic root, near the atrioventricular node can be challenging to eliminate safely by catheter ablation. In this study, we examine the characteristics of anteroseptal ATs in a cohort of patients at our centers, and demonstrate the long-term efficacy and ...
Occhetta Eraldo - - 2007
AIMS: In patients with atrial fibrillation (AF) and uncontrolled ventricular rate, radiofrequency (RF) ablation of the atrioventricular (AV) node and pacemaker (PM) implantation (ablate and pace) is a valid therapeutic approach, especially in elderly patients. The aim of our study was to evaluate the PM dependence and the incidence of ...
O'Hara Gilles E - - 2007
BACKGROUND: Catheter ablation is a curative treatment with excellent success and minimal complication rates for patients with supraventricular or ventricular arrhythmias. METHODS: The acute outcomes and complications of all catheter ablation procedures for supraventricular and ventricular arrhythmias performed at the Quebec Heart Institute (Sainte-Foy, Quebec) during a 14-year period from ...
Topilski Ian - - 2007
BACKGROUND: Data on the incidence and significance of catheter-induced trauma to fast and slow pathways are scarce. OBJECTIVES: To evaluate the incidence, predictors, and clinical implications of inadvertent catheter-induced mechanical trauma to fast and slow pathways during radiofrequency ablation (RFA) of atrioventricular nodal reentry tachycardia (AVNRT). METHODS: A total of ...
Satomi Kazuhiro - - 2008
BACKGROUND: The macroreentrant tachycardia that involves the left atrium (LA) and the pulmonary veins (PVs) after atrial fibrillation (AF) ablation has not been described. OBJECTIVE: To clarify the mechanism and electrophysiological characteristics of this tachycardia. METHODS AND RESULTS: Eight patients presented with recurrent regular tachycardia after the initial procedure, which ...
Gianotti Nicola - - 2007
The QRS interval of 56 out of 75 (74.7%) HIV-infected, drug-experienced patients (66.7% men) increased during treatment with boosted or unboosted atazanavir by a median 5 ms (interquartile range 0-9; P < 0.0001); the PR and the QTc intervals did not change significantly. New asymptomatic bundle branch blocks were observed ...
Choi Yun-Shik - - 2007
We report a 34-year-old female patient with preexcitation electrocardiogram and recurrent paroxysmal palpitations. Standard 12-lead electrocardiogram showed minimal preexcitation with normal PR interval and normal frontal QRS axis. The electrophysiologic study showed normal AH intervals, short HV intervals, and no change in the degree of preexcitation by rapid atrial pacing. ...
Boriani Giuseppe - - 2007
BACKGROUND: In sinus node disease (SND) atrial tachyarrhythmias (ATs) may frequently occur, after implant of a pacemaker for bradycardia, and are to be managed by rate or rhythm control. METHODS: We evaluated ventricular heart rate (HR) during AT, AT-related symptoms and hospitalizations in 333 patients who received DDDRP pacemakers for ...
Toogood Geoffrey - - 2007
BACKGROUND: Since the first cardiac pacemaker was inserted in 1958 vast changes have occurred in both the technology of the devices and their indications. OBJECTIVE: This article discusses the indications for pacemakers, currently available devices, insertion procedure, and patient follow up. DISCUSSION: Pacemakers have evolved from simple, single chamber devices ...
Lawrenz Thorsten - - 2007
OBJECTIVES: This study analyzed changes in intracardiac conduction during transcoronary ablation of septal hypertrophy (TASH) to identify predictors for pacemaker dependency after TASH. BACKGROUND: Transcoronary ablation of septal hypertrophy is an accepted therapeutic option in hypertrophic obstructive cardiomyopathy (HOCM). However, atrioventricular conduction disorders, requiring permanent pacemaker implantation, remain a major ...
Baker Meredith - - 2007
BACKGROUND AND PURPOSE: Most patients have minimal pain after percutaneous radiofrequency ablation (RFA) of a renal tumor. However, anecdotally, there is some variation in the amount of patient discomfort. Our goal was to identify relevant patient factors and characteristics of their renal tumors that may influence pain after percutaneous RF ...
Duray Gabor Z - - 2007
The atrioventricular (AV) node allows ante- and retrograde conduction between atria and ventricles. It is commonly assumed that these AV nodal conduction properties go hand in hand. However, ante- and retrograde AV conduction can be completely independent from each other in individual patients. We report about a patient with permanent ...
Sethi K K - - 2007
Wolff-Parkinson-White syndrome is a disorder characterized by presence of an accessory pathway which predisposes patients to tachyarrhythmias and sudden death. Among patients with WPW syndrome, atrioventricular reentrant tachycardia (AVRT) is the most common arrhythmia, accounting for 95% of re-entrant tachycardias. It has been estimated that one-third of patients with WPW ...
Harvey Monika - - 2007
Patients with hemispatial neglect show deficits in size perception. We investigated how this effect would be modulated by a change in object orientation. Seven right-hemisphere-lesioned patients, with and without neglect, and a control group, were asked to indicate which one of two bilaterally presented lines was longer, shorter or the ...
Garrigue Stéphane - - 2007
BACKGROUND: Cardiovascular diseases leading to pacemaker implantations are suspected of being associated with a high rate of undiagnosed sleep apnea syndrome (SAS). We sought to determine the prevalence and consequences of SAS in pacemaker patients according to pacing indications: heart failure, symptomatic diurnal bradycardia, and atrioventricular block. METHODS AND RESULTS: ...
Gururangan Sridharan - - 2007
We conducted a phase II study to assess the efficacy of oral temozolomide (TMZ) in children with progressive low-grade glioma. Thirty eligible patients were enrolled on this study. Median age at enrollment was 10 years (range, 4-18 years). Eligible patients received TMZ (200 mg/m(2) per day) by mouth for five ...
Erol-Yilmaz Ayten - - 2007
BACKGROUND: Although it is known that cardiac resynchronization therapy (CRT) in heart failure (HF) patients improves systemic circulation, its acute effects on microcirculation are as yet unknown. Therefore we investigated the sublingual microcirculatory changes in HF patients from CRT and right ventricular (RV) pacing by use of orthogonal polarization spectral ...
Zhou Y - - 2007
This study describes the electrophysiologic characteristics and radiofrequency ablation of focal atrial tachycardia (AT) arising from para-Hisian region in 14 (6.0%) patients of a consecutive series of 224 patients patients. Inverted or biphasic P wave in V(1) and uncharacteristic P wave in inferior leads were observed during tachycardia, suggesting that ...
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