Search Results
Results 451 - 500 of 1641
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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 ...
Thanopoulos Basil Vasilios D - - 2007
There are very few published reports of the transcatheter closure of perimembranous ventricular septal defects (PMVSDs) using the Amplatzer PMVSD occluder with encouraging initial results. This report presents initial and 1-year results from 54 patients with PMVSDs who underwent transcatheter closure at 5 different institutions with the Amplatzer PMVSD occluder. ...
Roberts-Thomson Kurt C - - 2007
OBJECTIVE: To characterize the electrocardiographic and electrophysiological features and frequency of focal atrial tachycardia (AT) originating from the right atrial appendage (RAA). BACKGROUND: The RAA has been described as a site of origin of AT, but detailed characterization of these tachycardias is limited. METHODS: Ten patients (3.8%) of 261 undergoing ...
Tse Hung-Fat - - 2007
BACKGROUND: Elderly pacemaker patients with chronotropic incompetence (CI) may experience orthostatic hypotension (OH) upon standing. The objective of this study was to determine whether a transient increase in heart rate (HR) by overdrive pacing upon standing prevents OH in elderly pacemaker patients. METHODS: We studied the effect of transient overdrive ...
Tanel Ronn E - - 2007
BACKGROUND: Pediatric patients with a history of atrial surgery are at risk for the development of sinus node dysfunction and atrial arrhythmias. However, there has been no comprehensive, long-term, electrophysiologic study of patients who have undergone repair of total anomalous pulmonary venous connection. METHODS: We evaluated school-aged and adolescent survivors ...
Sodeck G H - - 2007
AIM OF THE STUDY: Bradycardia may represent a serious emergency. The need for temporary and permanent pacing is unknown. METHODS: We analysed a registry for the incidence, symptoms, presenting rhythm, underlying mechanism, management and outcome of patients presenting with compromising bradycardia to the emergency department of a university hospital retrospectively ...
Lelakowski Jacek - - 2007
Background: Pacemaker dependency (PD) can be defined as the risk of serious injury or death from sudden pacemaker failure, an event more dangerous than progressive rate decrease. The aim of this study was to evaluate the incidence of PD during long-term follow-up after pacing system implantation. Methods and Results: The ...
Burri Haran - - 2007
BACKGROUND: Right ventricular septal pacing has been proposed as an alternative to apical pacing. However, data concerning thresholds and requirement for lead repositioning with this technique are scant. METHODS: We reviewed data at implantation and follow-up of 362 consecutive recipients of the same model of active fixation lead (Medtronic 5076-58, ...
Ong Mary Gertrude Y - - 2007
BACKGROUND: The occurrence of eccentric retrograde atrial activation has been demonstrated to be from 6 to 8% in patients with atrioventricular nodal reentrant tachycardia (AVNRT) by several previous reports. However, most of those reports were limited by the absence of coronary sinus venography to confirm if the retrograde activation was ...
Melzer Christoph - - 2006
BACKGROUND: Pacemaker-induced superior vena cava (SVC) syndrome is a rare but serious complication of permanent pacemaker implantation. Because of its rarity, little is known about the long-term prognoses of such patients. METHODS: Five patients, mean age 62 +/- 11.4 years, with pacemaker-induced SVC syndrome for more than 10 years were ...
Iturralde Pedro - - 2006
The abnormal development of the tricuspid valve in patients with Ebstein's anomaly results in several activation abnormalities including delayed intraatrial conduction, right bundle branch block (RBBB), and ventricular preexcitation. The aim of the present study was to define the ECG characteristics before and after ablation of an accessory A-V pathway ...
Trajkov I - - 2006
BACKGROUND: The purpose of this study was to evaluate the safety and efficacy of a radiofrequency catheter ablation in the patients with the Wolff-Parkinson-White syndrome or paroxysmal supraventricular tachycardia involving a concealed accessory atrio ventricular connection. METHODS AND RESULTS: During a 45 month period (1st January 2002 until 30th September ...
Kothari Snehal - - 2006
BACKGROUND: Atriofascicular accessory pathway (AP), often referred to as Mahaim pathway, is an uncommon form of preexcitation. The usual target for ablation is at the site of a high-frequency potential along the tricuspid annulus (TA). We present our observations in mapping and ablation of 29 patients with atriofascicular APs. METHODS ...
Kawamura Hiroshi - - 2006
OBJECTIVE: Escape rhythm is thought to play a considerable role in protection against adverse outcome due to pacemaker malfunction. We studied the escape rhythms in 32 patients with supraventricular tachyarrhythmia refractory to medical therapy who underwent radiofrequency ablation of the atrioventricular junction combined with implantation of a pacemaker. METHODS AND ...
Shalaby Alaa - - 2006
OBJECTIVES: This study tested the feasibility of automatically detecting advanced sleep disordered breathing (SDB) from a pacemaker trans-thoracic impedance sensor. BACKGROUND: SDB is prevalent yet under-diagnosed in patients with cardiovascular disease. The potential for automated detection of SDB in patients receiving pacemakers with respiration sensors has not been fully explored. ...
Villain Elisabeth - - 2006
OBJECTIVES: We sought to determine whether the presentation and prognosis of children with complete atrioventricular block (CAVB) were related to maternal antibody status. BACKGROUND: Comparative studies related to the presence or absence of maternal antibodies anti-SSB/La and anti-SSA/Ro are lacking in children with isolated complete CAVB. METHODS: From 1980 to ...
Takagi Yasuhiro - - 2006
BACKGROUND: Previous studies have shown that both atrioventricular nodal reentrant tachycardia (AVNRT) and atrial flutter (AFL) have an area of slow conduction located in the low posterior right atrium near the ostium of the coronary sinus. The aim of this study was to evaluate the inducibility of AFL in patients ...
Wong Tom - - 2006
OBJECTIVE: To demonstrate that the use of a 20-pole catheter (Halotrade mark) positioned around the tricuspid valve annulus (TVA) is helpful in rapidly localising right free wall accessory pathways (AP), enhancing catheter stability during ablation, and leading to increased success in ablating these challenging pathways. PATIENTS AND METHODS: Seven consecutive ...
Krittayaphong Rungroj - - 2006
BACKGROUND: Recent reports have shown abnormalities on cardiac magnetic resonance imaging (MRI) in patients with right ventricular outflow tract (RVOT) tachycardia. Objectives: Objectives of this study were to demonstrate abnormalities on MRI and signal-averaged ECG (SAECG) in patients with RVOT tachycardia and their correlation with the outcome of radiofrequency (RF) ...
Ruiz-Arango Andres F - - 2006
Acute cervical spinal cord injury frequently results in bradydysrhythmia, which may lead to hypotension and asystole. Such symptoms are more common in the first 2 weeks after the injury. Treatment modalities include atropine, epinephrine, aminophylline, and pacemaker insertion. The criteria for pacemaker use in this population are not well defined. ...
Bar-Cohen Yaniv - - 2006
INTRODUCTION: ECG algorithms used to localize accessory pathways (AP) in patients with Wolff-Parkinson-White (WPW) syndrome have been validated in adults, but less is known of their use in children, especially in patients with congenital heart disease (CHD). We hypothesize that these algorithms have low diagnostic accuracy in children and even ...
Reithmann Christopher - - 2006
INTRODUCTION: Delayed higher-degree atrioventricular (AV) block can develop after slow pathway ablation for AV nodal reentrant tachycardia with a preexisting first-degree AV block. Retrograde fast pathway ablation is considered as an alternative approach for patients with a markedly prolonged PR interval and no demonstrable anterograde fast pathway function at baseline. ...
Amitrano D - - 2006
AIM: Paroxysmal supraventricular tachycardia (PSVT) is a very frequent type of arrhythmia. Atrioventricular nodal reciprocating tachycardia (AVNRT) and atrioventricular reciprocating tachycardia through extranodal accessory pathways (AVRT) are the most common types of paroxysmal supraventricular tachycardia. We describe our experience in diagnosing these tachycardia by electrophysiological transesophageal study (ETS). METHODS: Three ...
Law Ian H - - 2006
BACKGROUND: Junctional ectopic tachycardia in the normal heart is rare and often is resistant to pharmacologic management. Transcatheter ablation using radiofrequency energy places the AV node at risk. OBJECTIVES: The purpose of this study was to report our experience with transcatheter cryothermal ablation using three-dimensional mapping in six patients with ...
Barker, Paul S.
A single dose of 0.6 Gm. of quinidine sulfate was given by mouth to each of five patients with sinus tachycardia. The cardiac rate was either not affected or was slightly increased.In one patient, transient right bundle branch block occurred two hours after the administration of quinidine, upon two separate ...
Milasinovic Goran - - 2006
BACKGROUND: In patients requiring permanent pacing, preservation of intrinsic ventricular activation is preferred whenever possible. The Search AV+ (SAV+) algorithm in Medtronic EnPulsetrade mark dual-chamber pacemakers can increase atrioventricular (AV) intervals to 320 ms in patients with intact or intermittent AV conduction. This prospective, multicenter study compared the percentage of ...
Jose Maria Calvo-Romero, Esther ...
Aim: We study the electrocardiographic abnormalities at time of diagnosis of acute PE in our series of consecutive patients of the last years. We conclude that the electrocardiogram may have diagnostic and prognostic value in patients with acute PE. Methods: We retrospectively reviewed the records of 154 consecutive patients with ...
González-Torrecilla Esteban - - 2006
BACKGROUND: The difference between the first postpacing interval (PPI) after tachycardia entrainment from the right ventricular apex and the tachycardia cycle length (TCL) can be used as an index of proximity to the circuit. OBJECTIVES: The purpose of this study was to determine whether the response to entrainment of tachycardia ...
Kannankeril Prince J - - 2006
BACKGROUND: Young patients with atrioventricular nodal reentry tachycardia (AVNRT) frequently do not display discrete dual AV node physiology (DAVNP) as classically defined. The purpose of the study was to investigate the prevalence of sustained slow pathway conduction (SSPC; PR > RR during atrial pacing) in young patients with AVNRT and ...
Nam Gi-Byoung - - 2006
INTRODUCTION: The presence of atrionodal connections and coronary sinus (CS) breakthrough in atrioventricular nodal reentrant tachycardia (AVNRT) has been suggested. However, the incidence, anatomic relationship with reentrant circuit, and results of catheter ablation are unknown. METHODS AND RESULTS: Fifty-two patients with typical slow/fast AVNRT and 10 patients with atypical slow/intermediate ...
Yu C-M - - 2006
Severe acute respiratory syndrome (SARS) is a virulent viral infection that affects a number of organs and systems. This study examined if SARS may result in cardiovascular complications. 121 patients (37.5 (SD13.2) years, 36% male) diagnosed to have SARS were assessed continuously for blood pressure, pulse, and temperature during their ...
Walsh M A - - 2006
OBJECTIVE: To look at the presentation, treatment and outcome of patients who developed atrioventricular block after transcatheter closure of a perimembranous ventricular septal defect (PMVSD) with the Amplatzer PMVSD device. SETTING: Three tertiary referral centres for paediatric cardiology in two countries. RESULTS: All three patients presented within 10 days of ...
Pasquié Jean Luc - - 2006
The association of atrioventricular nodal re-entrant tachycardia (AVNRT) and pre-existing prolonged PR interval is unusual. Radiofrequency (RF) ablation in such patients may be associated with an increased risk of immediate and delayed AV block. The aim of our study is to assess the long-term efficacy and safety of slow pathway ...
Horie Tsutomu - - 2005
BACKGROUND: Atrial tachycardia (AT) can originate from the proximal coronary sinus (CS). However, detailed electrophysiologic characteristics of the tachycardia are not available. OBJECTIVES: We describe the electrophysiologic characteristics, response to adenosine 5'-triphosphate, and results of radiofrequency ablation of AT with the earliest activation in the proximal CS. METHODS: In 7 ...
Payeras G - - 2005
BACKGROUND AND STUDY AIMS: Capsule endoscopy is a new, noninvasive diagnostic technique which enables visualization of the mucosa of the small intestine in physiological conditions and without the need to subject the patient to external radiation. Wireless capsule video endoscopy is contraindicated in patients with a cardiac pacemaker. However, on ...
Carminati Mario - - 2005
This study reports on experience with transcatheter closure of congenital ventricular septal defects (VSDs) with Amplatzer septal occluders. From January 2000 to April 2005, transcatheter Amplatzer device implantation was attempted in 122 patients with congenital VSD (30 with muscular, 87 with perimembranous, and 5 with residual postsurgical repair of conotruncal ...
Yip William C L - - 2005
Two patients with perimembranous ventricular septal defects (VSDs) and inlet extension have undergone uncomplicated transcatheter device closure using the Amplatzer membranous VSD device. Both patients developed complete heart block 2-4 days from the closure. Both patients responded well to high-dose intravenous therapy with steroids and high-dose oral anti-inflammatory aspirin. Both ...
Gerstenfeld Edward P - - 2005
BACKGROUND: Both focal and macroreentrant atrial tachycardia (ATs) can occur after pulmonary vein (PV) isolation for treatment of atrial fibrillation (AF). We report the response to pacing and pharmacologic maneuvers performed in patients with stable focal ATs after segmental PV isolation. OBJECTIVES: The purpose of this study was to determine ...
Padeletti Luigi - - 2005
BACKGROUND: Atrial tachyarrhythmias (AT) are considered progressive diseases. Several rhythm control therapies for treatment of AT have been proposed. OBJECTIVES: The Italian AT500 Registry was designed to prospectively study long-term AT evolution in patients paced for the brady-tachy form of sinus node disease (BT-SND). METHODS: Three hundred forty-six BT-SND patients ...
Movahed Mohammad-Reza - - 2005
BACKGROUND: Diabetes mellitus (DM) is a major risk for cardiovascular disease and mortality. There is some evidence that third-degree atrioventricular (AV) block occurs more commonly in patients with DM. In this study, we evaluated any possible association between DM and third-degree AV block using International Classification of Diseases, Ninth Revision, ...
Kriebel Thomas - - 2005
INTRODUCTION: Cryoenergy has evolved as a safe and effective alternative for ablation of arrhythmia substrates in adult patients. Due to two specific features, cryomapping and cryoadhesion, this technique appears very attractive for pediatric patients minimizing complications and fluoroscopy time. The aim of the study was to investigate efficacy and safety ...
Sathananthar Shanmugam - - 2005
OBJECTIVES: To assess the impact of canine fossa puncture (CFP) with clearance of the maxillary sinus during endoscopic sinus surgery on the subjective and objective outcomes as defined by quality of life questionnaires, endoscopic findings, endoscopic aspirate for culture and sensitivity, and magnetic resonance imaging (MRI) evaluation. STUDY DESIGN: Retrospective, ...
Whinnett Z I - - 2005
The large outcome studies of biventricular pacing to date have selected patients using electrocardiogram criteria (prolonged QRS and left bundle branch block morphology). However, 20-30% of patients do not appear to respond clinically, and as a result there has been much interest in developing more specific methods of detecting mechanical ...
Ramirez Jason G - - 2005
A patient with unrecognized atypical pseudocholinesterase was given succinylcholine and then vecuronium before neuromuscular monitoring was instituted. Subsequently, when neostigmine and glycopyrrolate were given to reverse what was thought to be a nondepolarizing block, the patient became further relaxed, and his trachea could not be extubated for more than 10 ...
Sukhija Rishi - - 2005
BACKGROUND: One study showed in 506 patients with automatic implantable cardioverter-defibrillators (AICDs) that the mortality at 1-year follow-up was 6.5% with ventricular backup pacing at 40/minute (VVI-40) versus 10.1% in patients with dual-chamber rate responsive pacing at 70/minute (DDDR-70). METHODS: We performed a retrospective study to determine all-cause mortality in ...
Hodge Jacqueline - - 2005
Percutaneous spinal blocks are diagnostic or therapeutic procedures designed to help the neurologist or orthopaedist in their evaluation of confounding low back and/or lower extremity pain. During the initial workup, nonspinal percutaneous blocks, such as hip or sacroiliac joint injection, may be necessary to exclude one of these sites as ...
Edwards N C - - 2005
BACKGROUND AND AIMS: Chest radiographs (CXRs) are performed routinely after permanent pacemaker implantation to identify pacemaker lead position and exclude pneumothorax. We assessed the clinical value and need for this procedure. DESIGN: Retrospective analysis of pacemaker data and CXRs following permanent pacemaker insertion between December 2002 and February 2004. MATERIALS ...
Kouris Nikos T - - 2005
A 30 year-old male patient with a history of Fabry's disease, was referred to hospital with symptoms of dizziness, hypotension and weakness. Fabry's disease had been diagnosed 2 years before, based on angiokeratoma and hypohidrosis on physical examination and complete lack of alpha-galactosidase A on laboratory examination. The ECG on ...
Bae Eun-Jung - - 2005
BACKGROUND: Although supraventricular tachycardia in complex congenital heart disease (CHD) has been reported after surgical repair, its exact electrophysiologic identification has been limited to intraatrial reentrant tachycardia (IART). Moreover, junctional tachycardia (JT) has not previously been described as a cause of late postoperative arrhythmia. METHODS AND RESULTS: Since 1993, a ...
Lee Shih-Huang - - 2005
BACKGROUND: Junctional rhythm (JR) is commonly observed during radiofrequency (RF) ablation of the slow pathway for atrioventricular (AV) nodal reentrant tachycardia. However, the atrial activation pattern and conduction time from the His-bundle region to the atria recorded during JR in different types of AV nodal reentrant tachycardia have not been ...
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