Search Results
Results 651 - 700 of 1723
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Gornick Charles C - - 2002
Unexpected loss of bipolar pacing function can occur in Guidant VIGOR dual chamber pacemakers with QC2 (Quick Connect) headers. In a retrospective review of 305 implanted patients, 23 exhibited unexpected loss of bipolar pacing lead function from < 1 to 51 months postimplant. Atrial lead problems were seen in 17 ...
Taylor C - - 2002
AIMS: To examine the feasibility of using the ROMEO (rule out myocardial events on "obs" ward) pathway for low risk patients with chest pain in a UK emergency department. METHODS: A prospective study was undertaken to determine outcomes for the first 100 patients entering the pathway (from May to Oct ...
Atiga Walter L - - 2002
In patients with atrial flutter, conventional RF ablation may not result in complete isthmus block. This prospective, randomized study tested the hypothesis that the cooled RF ablation is safe and facilitates the achievement of isthmus block with fewer RF applications than with standard ablation for typical atrial flutter. Isthmus ablation ...
Christ Torsten - - 2002
BACKGROUND: The Inos2 DDDR pacemaker senses unipolar intracardiac impedance signals for adapting heart rate to meet the haemodynamic needs of physical activity. Theoretically, such pacing devices could be limited by positive feedback since increase in beating frequency per se enhances contractility. We have addressed this problem in patients with chronotropic ...
Kafali Gülden - - 2002
We reviewed hospital records of 45 children with corrected transposition of the great arteries (c-TGA) to determine the incidence and outcome of congenital and postoperative dysrhythmias seen in this congenital anomaly. Our study comprised 45 patients (12 girls, 33 boys). The mean age of the patients at initial evaluation was ...
Iturralde Pedro - - 2002
The aim of the study was to review the clinical and electrophysiological characteristics and results of radiofrequency catheter ablation in patients with multiple accessory pathways to compare them with those of patients with single accessory pathways. Electrophysiological study and radiofrequency catheter ablation were performed in 1010 consecutive cases with Wolff ...
Reiffel James A - - 2002
This article reports a new, transient, but identical electrocardiogram presentation in 2 patients at 2 different institutions. While its mechanism is uncertain, analysis by exclusion suggests that a diffusely prolonged but nonhomogenous myocardial refractoriness may have altered both QRS morphology and amplitude and also may have resulted in periods of ...
Schuchert Andreas - - 2002
BACKGROUND: It is generally acknowledged that pacemaker output must be adjusted with a 100% voltage safety margin above the pacing threshold to avoid ineffective pacing, especially in patients dependent on pacemakers. AIMS: The aim of this prospective crossover study was to assess the beat-to-beat safety of low outputs in patients ...
Elefteriades John A - - 2002
The authors have previously shown that conditioning of the diaphragm for continuous bilateral pacing is a feasible and effective means of ventilation in patients with complete respiratory paralysis from high cervical (above C3) quadriplegia. The present study reports the long-term results of continuous diaphragmatic pacing. Twelve quadriplegia patients underwent bilateral ...
Faddis Mitchell N - - 2002
There is a high prevalence of cardiovascular disorders among elderly patients with recurrent falls or syncope, and cardiovascular causes are implicated in a significant proportion of three cases. Common cardiovascular causes of falls and syncope include carotid sinus syndrome, vasovagal episodes, sick sinus syndrome, and atrioventricular block. A comprehensive history ...
Alakhras Mazen - - 2002
We describe a patient with bifascicular block, who developed transient high-degree atrioventricular block during dipyridamole infusion. This patient was subsequently found to have significant His-Purkinje disease at electrophysiology study, and underwent permanent pacemaker implantation. Spontaneous atrioventricular block was documented during follow-up. This case report raises the issue of dipyridamole safety ...
Yao Chih-Ta - - 2002
Congenital long QT syndrome (LQTS) with atrioventricular block is a rare and malignant arrhythmia, which usually responds poorly to traditional beta-blocker therapy. We describe a male neonate with LQTS with ventricular tachycardia and 2:1 atrioventricular block. This patient's sister had similar presentation and died suddenly at the age of 8 ...
Kurup Ravi Kumar - - 2002
The isoprenoid pathway produces three key metabolites--digoxin (membrane Na(+)-K+ ATPase inhibitor, regulator of neurotransmitter transport, and immunomodulatory agent), dolichol (regulatory of N-glycosylation of proteins), and ubiquinone (free-radical scavenger). The pathway was assessed in systemic lupus erythematosis with neuropsychiatric manifestations, slow viral diseases (subacute sclerosing panencephalitis [SSPE], and Creutzfeldt-Jakob disease [CJD]) ...
Antz Matthias - - 2002
INTRODUCTION: Cardiac arrest in patients with Wolff-Parkinson-White (WPW) syndrome can be due to ventricular fibrillation mediated by fast conduction over the accessory pathway during atrial fibrillation. However, if primary ventricular fibrillation is the reason for resuscitation, placement of an implantable cardioverter defibrillator (ICD) would be indicated. The aim of this ...
Singer Wolfgang W Department of Neurology, Mayo Clinic, Rochester, Minn 55905, - - 2002
To determine whether an intrinsic sinus node abnormality is involved in the pathophysiology of the postural tachycardia syndrome (POTS). SUBJECTS, PATIENTS, AND METHODS: In this prospective study, we compared the relationship between P-wave axis (PWA) and heart rate (HR) in 11 healthy controls and 14 patients with POTS by obtaining ...
Hussain A - - 2002
OBJECTIVE: To determine the frequency of post-operative conduction abnormalities in Pakistani patients undergoing total correction for Fallot's Tetralogy. PATIENTS AND METHODS: One hundred and fifteen patients of Fallot's Tetralogy underwent definitive repair between January, 1999 and April, 2000. Their mean age was 12.89 years (range 3-30 years). One hundred nine ...
Chang Michael - - 2002
A patient with a port-a-cath was given 12 mg of adenosine for paroxysmal supraventricular tachycardia (PSVT), resulting in prolonged (13 s) bradycardia and severe side effects. When the same patient presented 2 weeks later for recurrent PSVT, only 3 mg of adenosine was needed to terminate the episode, without the ...
Wallbrück K - - 2002
A clinical study investigates the use of Home Monitoring (HM) in pacemaker therapy. For 3 months patients are supervised by daily automatic HM messages. Endpoints are the technical feasibility and the clinical benefit of HM. Ninety three patients have currently been included and followed for 72 +/- 30 days. Three ...
Diakomanolis Emmanuel - - 2002
To assess the effectiveness of laser ablation and upper vaginectomy in the treatment of vaginal intraepithelial neoplasia (VAIN), we have reviewed the charts of 52 patients managed with laser ablation (28 patients) and upper colpectomy (24 patients). On the basis of our results, patient selection and operator skill have a ...
Kenny R A - - 2001
OBJECTIVES: The aim of the study was to determine whether cardiac pacing reduces falls in older adults with cardioinhibitory carotid sinus hypersensitivity (CSH). BACKGROUND: Cardioinhibitory carotid sinus syndrome causes syncope, and symptoms respond to cardiac pacing. There is circumstantial evidence for an association between falls and the syndrome. METHODS: A ...
Erdogan O - - 2001
This report describes an asymptomatic patient with a DDDR pacemaker system (Inos Cls, Biotronik) that showed intermittent mode reversion to VOO and sometimes to VVI without a detectable source of electromagnetic interference and oversensing. Patients with this Biotronik model should be carefully assessed along with a surface ECG before placing ...
Uemura A - - 2001
In patients with primary atrioventricular (AV) conduction disturbances, lesions are commonly believed to be limited to the conduction system. In the present study, myocardial lesions were analyzed histologically in patients with AV conduction disturbances to determine the presence of myocarditis. We studied 50 patients with second or third degree AV ...
Brignole M - - 2001
BACKGROUND: In patients with syncope and bundle branch block (BBB), syncope is suspected to be attributable to a paroxysmal atrioventricular (AV) block, but little is known of its mechanism when electrophysiological study is negative. METHODS AND RESULTS: We applied an implantable loop recorder in 52 patients with BBB and negative ...
Liu S - - 2001
The objective of this study was to delineate the sex distribution and atrioventricular conduction properties in patients with manifest or concealed Wolff-Parkinson-White syndrome (WPW) and atrioventricular nodal reentrant tachycardia (AVNRT). The study comprised 328 patients with AVNRT, 347 with manifest, and 220 with concealed WPW who underwent radiofrequency ablation. A ...
Baker J - - 2001
Care paths and patient pathways are collaborative interdisciplinary tools developed to provide quality care. One goal in progressive renal insufficiency (PRI) care is to provide patients and family members with relevant and timely information to help them cope with medical therapy and lifestyle changes required to slow the progression of ...
Weismüller P - - 2001
BACKGROUND: Patients with more than one AV nodal pathway show two and more peaks in the histogram of the R-R intervals of the Holter monitoring ECG during atrial fibrillation. It was the purpose of the present study to determine the number of patients showing more than one AV nodal pathway ...
Kriatselis H D - - 2001
The short- and long-term effect of radiofrequency (RF) modification of the AV junction on ventricular rate and left ventricular function and the different types of ventricular response during energy application under autonomic nervous blockade were assessed in 28 patients with medically refractory atrial fibrillation. During the successful RF application, ventricular ...
De Groot N M - - 2001
Voltage differences might be used to distinguish normal atrial tissue from abnormal atrial tissue. This study was aimed at identifying lowest voltage areas in patients with atrial tachycardia after surgical correction of congenital heart disease and to evaluate if identification of these areas in diseased hearts facilitates selection of critical ...
Wiegand U K - - 2001
Unipolar ventricular leads were implanted in a considerable percentage of pacemaker recipients. There is little information on incidence and risk factors for unipolar pacemaker dysfunction using modern lead designs. Included in a cross-sectional analysis were 682 patients who fulfilled the following criteria: chronically implanted bipolar ventricular leads (> 1 year), ...
Liu S - - 2001
The relation between the atrioventricular conduction properties of the atrioventricular node and the anterograde conduction ability over the accessory pathway in the Wolff-Parkinson-White syndrome has never been studied. Atrioventricular nodal characteristics were studied in 285 patients with manifest and 204 with concealed accessory pathway who underwent radiofrequency ablation, and compared ...
Schuchert A - - 2001
The programmability of cardiac pacemakers enables the physician at follow-up to adjust the pacing pulse under consideration of the 100% safety margin with respect to the individual pacing threshold. The purpose of reducing the output is to prolong pacemaker longevity. The aims of this prospective, randomized trial were to compare ...
Christini D J - - 2001
In vitro experiments have shown that the complexity of atrioventricular nodal (AVN) conduction dynamics increases with heart rate. Although complex AVN dynamics (e.g., alternans) have been observed clinically, human AVN dynamics during rapid pacing have not been systematically investigated. We studied such dynamics during ventricular-triggered atrial pacing in 37 patients ...
Oomman A - - 2001
OBJECTIVE: Surgery has been the only therapeutic option in patients with hypertrophic obstructive cardiomyopathy (HOCM) who are resistant to standard treatment. Percutaneous transluminal septal myocardial ablation (PTSMA) by alcohol-induced occlusion of the septal artery for the reduction of left ventricular outflow tract (LVOT) gradient is a novel method. However, long-term ...
D'Este D - - 2001
AIMS: The purpose of this study was to investigate the relationship between the incidence of dual atrioventricular (AV) nodal pathways and age. Age-related changes in the AV node electrophysiological properties have rarely been investigated. AV nodal re-entrant tachycardia is more frequent in the young than in the elderly. METHODS AND ...
Tobias J D - - 2001
Patients receiving anticonvulsants such as phenytoin or carbamazepine may be resistant to neuromuscular blocking agents. The authors report the response to rapacuronium bromide (1.5 mg/kg) in two adult patients; one receiving phenytoin and the other receiving carbamazepine. In both patients, there was a delay in achieving maximum blockade; 100% depression ...
Tang A S - - 2001
BACKGROUND: A recently completed trial, the Canadian Trial of Physiological Pacing (CTOPP), showed that physiological pacing did not significantly reduce mortality, stroke, or heart failure hospitalization, but it did show that atrial fibrillation occurred less frequently in patients with physiological pacing. Many pacemaker patients experience only transient bradyarrhythmias with an ...
Rokas S - - 2001
BACKGROUND: This study evaluates the role of RR interval distribution pattern as an outcome predictor of radiofrequency (RF) modification of atrioventricular (AV) node in chronic atrial fibrillation (AF) and attempts to elucidate the likely mechanism of rate control. METHODS AND RESULTS: Sixty-five patients with chronic AF underwent AV node modification. ...
Graux P - - 2001
While carotid sinus syndrome (CSS) is often suspected as a cause of syncope in the elderly, whether it represents an indication for cardiac pacing may remain uncertain. Bradycardia algorithms included in pacemakers are now able to establish a precise relationship between spontaneous asystole and occurrence of symptoms and strengthen the ...
Chiu C C - - 2001
The use of the implanted atrial-based pacemaker to overdrive postsurgical intraatrial reentry tachycardia (IART) was evaluated in a large group of pediatric patients over a 14-year study period. The authors sought to determine the feasibility of this noninvasive technique in the management of this specialized population and to determine factors ...
Kato I - - 2001
In six patients with chronic bradydysrhythmias, polysomnographies were performed before cardiac pacemaker implantation and over the week following implantation. A patient with third-degree atrioventricular block (AVB) and two patients with sinus node dysfunction (SND) were associated with sleep-disordered breathing (SDB). Their cardiac pacemaker therapies, with the increase in the average ...
Annesley-Williams D J - - 2001
The purpose of the study was to assess the cure rate in patients with indirect carotico-cavernous fistula (CCF) treated by transvenous embolisation via the inferior petrosal sinus (IPS) pathway or the superior ophthalmic vein (SOV). Twelve fistulae in 11 patients were treated by transvenous embolisation, eight patients via the IPS ...
Mak P H - - 2001
Thirty unpremedicated ASA physical status 1-3 patients aged between 18 and 69 years, scheduled for upper limb surgery, received a conventional supraclavicular brachial plexus block using a nerve stimulator and bupivacaine 0.375% 0.5 ml.kg-1. Spirometric measurements of pulmonary function and ultrasonographic assessments of diaphragmatic function were made before the block ...
Cohen M I - - 2001
OBJECTIVES: There is an increasing incidence of sinus node dysfunction after the Fontan procedure. Inability to maintain atrioventricular synchrony after the Fontan operation has been associated with an adverse late outcome. Although pacing may be helpful as a primary or adjunct modality after the Fontan procedure, the effects of performing ...
Kristensen L - - 2001
This retrospective study included a large cohort of consecutive patients primarily implanted at Skejby University Hospital with an AAI/AAIR pacemaker because of sick sinus syndrome (SSS) from July 1981 to July 1999. The primary aim of the study was to analyze the risk of developing AV block during long-term follow-up. ...
Yamamoto T - - 2001
Persistent perineal sinus is a common and serious cause of morbidity after proctectomy for Crohn's disease. Recently we have performed excision and omentoplasty on 6 patients with persistent perineal sinus. The perineal sinus was completely excised and communication was established with the pelvis. In 4 patients, the left gastroepiploic vessels ...
Gill K S - - 2001
We have described a patient who developed a small submitral pseudoaneurysm of the left ventricle during electrophysiologic mapping aimed at ablating a concealed accessory pathway. The patient was asymptomatic, and the lesion was detected on a routine postprocedure echocardiographic study. Spontaneous healing occurred, and the lesion was no longer seen ...
Boissel N - - 2001
Phrenic pacing can restore diaphragmatic contractions in patients with central respiratory paralysis. It relies on radiofrequency transmission of energy from an external unit to implanted receivers through circular coil antennas. The case of a patient is reported in whom severe hypoventilation occurred following the use of a metallic rescue blanket. ...
Lipscomb K J - - 2001
OBJECTIVE: To examine the cycle length of the junctional tachycardia often seen during successful slow pathway ablation for atrioventricular (AV) node re-entrant tachycardia, to determine whether shorter cycle lengths predict imminent atrioventricular block. DESIGN: Retrospective analysis of consecutive patients undergoing slow pathway modification. Intracardiac recordings were analysed after digital storage ...
Pelargonio G - - 2001
INTRODUCTION: There are few data regarding the occurrence of delayed heart block at least 24 hours after radiofrequency catheter ablation (RFCA) of AV nodal reentry or posteroseptal accessory pathways (APs). We investigated the late occurrence of heart block in this population, the clinical outcome, and whether findings at electrophysiologic study ...
Luria D M - - 2000
This study assessed antidromic reciprocating tachycardia (ART) in patients with paraseptal accessory pathways (APs). Previous clinical experience suggests that paraseptal APs are unable to serve as the anterograde limb during ART. Based on the reentry wavelength concept, we hypothesized that anatomic location of a paraseptal AP may not preclude occurrence ...
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