Search Results
Results 401 - 450 of 1707
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Roten Laurent - - 2010
Atrioventricular (AV) conduction impairment is well described after surgical aortic valve replacement, but little is known in patients undergoing transcatheter aortic valve implantation (TAVI). We assessed AV conduction and need for a permanent pacemaker in patients undergoing TAVI with the Medtronic CoreValve Revalving System (MCRS) or the Edwards Sapien Valve ...
Cassagneau Romain - - 2011
Introduction:  Cardiac pacemakers with preerosion are often reimplanted. Preerosion may be caused by an evolving local infectious process affecting the entire pacing system or by mechanical migration of the device causing ischemic necrosis of the skin tissues. We examined the long-term outcome of 33 patients who underwent pocket or scar ...
Yang Yanfei - - 2010
Intra-isthmus reentry (IIR) is a circuit within the cavotricuspid isthmus (CTI). The purpose of this study is to prospectively define the electrogram and surface ECG characteristics of IIR, and its clinical implications. Fourteen patients underwent electrophysiological studies and were found to have IIR. Detailed electrogram mapping of the CTI was ...
Biffi Mauro - - 2011
We studied long-term right ventricular (RV) pacing threshold (RVPT) behavior in patients consecutively implanted with pacemakers capable of automatic output reprogramming tracked by automatic RV threshold measurement (automatic verification of capture [AVC]). All the patients had state-of-the art steroid-eluting bipolar pacing leads and were RV-paced by an AVC algorithm from ...
Chen Hung-Yuan - - 2010
BACKGROUND: Fetuin A, a predictor of mortality in dialysis patients, is associated with vascular calcification and atherosclerosis in hemodialysis (HD) patients. Whether it predicts arteriovenous (AV) access patency is unknown. This study aimed to investigate the association between fetuin A and AV access patency in HD patients. STUDY DESIGN: Prospective ...
Sternick Eduardo Back - - 2011
The ECG, clinical, and electrophysiologic profiles of patients with a fasciculoventricular pathway are well described. Fasciculoventricular pathways occurring in the setting of glycogen storage cardiomyopathy possess unique features. The purpose of this study was to compare the clinical, ECG, and electrophysiologic characteristics of patients with a fasciculoventricular pathway, with or ...
Chen Gang - - 2011
The ectopic foci originating from superior vena cava (SVC) may act as triggers in the occurrence and perpetuation of atrial fibrillation (AF). Unfortunately, the SVC isolation may result in potential dysfunction of sinus node. Furthermore, little is known about the occurrence of sinus node injury complicated by the SVC isolation. ...
Modi Simon - - 2012
This is an interesting report of a supraventricular tachycardia in a paced patient with intermittent atrioventricular nodal block. Only electrophysiology testing revealed the correct diagnosis. Images explain how pacemaker timing cycles and refractory periods can confuse an otherwise straightforward diagnosis. (PACE 2010; 1-3).
Tonet Joelci - - 2010
The efficacy of radiofrequency (RF) ablation of an uncommon coronary sinus (CS)-dependent atrial flutter (AFL) was evaluated using conventional electrophysiological criteria in a highly selected subset of patients with typical and atypical AFL. Fourteen patients with atrial flutter (11 males, mean age 69 ± 9 years) without previous right or left atrial RF ...
Niksch Alisa - - 2010
Remifentanil is commonly used during anesthesia in pediatric electrophysiologic studies (EPS). The purpose of this study is to determine the effects of remifentanil on the cardiac electrophysiologic properties of children undergoing ablation of supraventricular tachycardia (SVT). A prospective study was performed in patients undergoing EPS before ablation of SVT. Each ...
Vassilikos Vassilios P - - 2010
Radiofrequency catheter ablation (RFA) is an effective treatment of arrhythmias. However, patients often remain symptomatic after the procedure. We aimed to assess the arrhythmia recurrence after successful RFA in relation to patients' symptoms using transtelephonic loop recorders. Thirty-six consecutive patients (age 50 +/- 14 years, 17 males/19 females) were enrolled ...
Giazitzoglou Eleftherios - - 2010
Slow-pathway ablation or modification eliminates typical atrioventricular nodal re-entrant tachycardia (AVNRT) but with a 1% risk of AV block. We report our experience from a series of consecutive patients with typical AVNRT who were ablated in our unit. Consecutive patients (n=227), aged 22 to 56 years, 172 women, with slow-fast ...
Padeletti Margherita - - 2010
Sleep disordered breathing (SDB), a common condition among patients with permanent pacemaker (PM), is associated with greater incidence of cardiac arrhythmias. Scarce availability of sleep laboratories and the high costs of nocturnal-attended polysomnography limit the routine screening of patients with PM for SDB. We investigated whether a novel PM that ...
Kanjwal Khalil - - 2010
Autonomic dysfunction presenting as inappropriate sinus tachycardia has been reported to occur following slow pathway ablation for atrioventricular node tachycardia. We report on a series of patients who developed new onset postural orthostatic tachycardia syndrome (POTS) following successful radiofrequency ablation of atrioventricular nodal reentrant tachycardia (AVNRT). The study was a ...
Lichtenstein Brian J - - 2010
Permanent cardiac pacing in pediatric patients presents challenges related to small patient size, complex anatomy, electrophysiologic abnormalities, and limited access to cardiac chambers. Epicardial pacing currently remains the conventional technique for infants and patients with complex congenital heart disease. Pacemaker lead failure is the major source of failure for such ...
Nijhawan Navdeep N Section of Ophthalmology, McMaster University, Hamilton, Ontario, - - 2010
To describe the lymphatic drainage patterns of the human eyelids. Twenty-eight consenting patients who underwent unilateral eyelid surgery at McMaster University between March 2001 and July 2003 had their contralateral eyelids injected with 0.2 ml (0.250 mCi) of Tc 99 m sulphur colloid. The patients were divided into 1 of ...
Nayar Vikram V - - 2010
The infratentorial supracerebellar approach to the pineal region presents special challenges during patient positioning. The head must be flexed and the body positioned to allow an operative trajectory under the straight sinus. Image guidance is not useful during positioning because registration and navigation take place after the head is fixed ...
Zhou Yi-Feng - - 2010
Focal atrial tachycardia (AT) arising from non-coronary cusp (NCC) is very rare, and the experience in catheter ablation of this kind of tachycardia remains limited. This study describes the electrophysiologic characteristics and radiofrequency ablation of AT arising from NCC. The study population consisted of five consecutive patients (three females and ...
Nigro Gerardo - - 2010
OBJECTIVE: Atrioventricular nodal reentrant tachycardia (AVNRT) accounts for about 60% of the patients presenting with paroxysmal supraventricular tachycardia. The radiofrequency (RF) catheter ablation of the slow atrioventricular (AV) node pathway is the preferred therapeutic approach in patients with AV node reentrant tachycardia. The aim of our study was describe the ...
Kantoch Michal J - - 2010
AIMS: The study was designed to assess atrio-ventricular (AV) conduction with non-invasive methods at least 1 year after radiofrequency ablation (RFA) of the slow pathway for AV node reentry tachycardia. METHODS AND RESULTS: Medical records of all patients who underwent RFA before their 18th birthday were reviewed. Patients were brought ...
Martí-Almor Julio J Servicio de Cardiología, Hospital del Mar, Barcelona, - - 2010
Patients with chronic bifascicular block (BFB) can progress to advanced atrioventricular block (AVB), especially when syncope or a prolonged HV interval is present. It is possible that other variables could help identify patients who would benefit from prophylactic pacemaker implantation. The study involved 263 consecutive BFB patients seen at a ...
Sacher Frederic - - 2010
AIMS: Catheter ablation for Wolff-Parkinson-White syndrome (WPW) can be challenging and is associated with failure in approximately 1-5% of cases. We analysed the reasons for failure. METHODS AND RESULTS: All patients (89 patients, 28 +/- 16 years old) referred for WPW ablation after a prior failure were studied. Reasons for ...
Panas Marios - - 2010
Interatrial block is a predictor of atrial arrhythmias. Aim of the present study was to estimate the prevalence of interatrial block (IAB) in Friedreich's Ataxia (FA) compared to controls and correlate it with echocardiographic and genetic features. IAB, defined as an electrocardiographic (ECG) derived P-wave duration >120 ms, echocardiographic variables ...
Biffi Mauro - - 2010
We evaluated the impact of an algorithm for automatic right ventricular (RV) stimulation compared to fixed-output pacing (FOP) stimulation on actual pacemaker longevity over a 9-year follow-up. Prospective observation of 300 patients implanted with VDDR/DDDR pacemakers in 1999-2000 up to October 31, 2008. Sixty-one patients were paced by Autocapture pacing ...
Pintarić Hrvoje - - 2010
The aim of this prospective, non-randomized interventional study was to assess electrophysiological effects, efficacy and safety of intravenous propafenone in termination of atrioventricular nodal reentrant tachycardia (AVNRT) and orthodromic atrioventricular reentrant tachycardia (AVRT). This single-center study was carried out at Department of Cardiology, Sestre milosrdnice University Hospital in Zagreb, Croatia, ...
Delhaas Tammo - - 2010
To assess the prevalence, history, and treatment of arrhythmias, in particular preexcitation and Wolff-Parkinson-White (WPW) syndrome, in patients with Ebstein anomaly (EA) during childhood and adolescence, we performed a multicenter retrospective study of all consecutive live-born patients with EA, diagnosed, and followed by pediatric cardiologists between 1980 and 2005 in ...
Padanilam Benzy J - - 2010
BACKGROUND: Patients with left bundle branch block (LBBB) undergoing right heart catheterization can develop complete heart block (CHB) or right bundle branch block (RBBB) in response to right bundle branch (RBB) trauma. We hypothesized that LBBB patients with an initial r wave (>or=1 mm) in lead V1 have intact left ...
Liberman Leonardo - - 2010
In patients with pre-excitation, a short PR interval and a delta wave are not always clearly seen, particularly if the pre-excitation is mild. Absent septal Q waves have been used as additional evidence suggestive of pre-excitation. The purpose of the present study was to determine the incidence of normalization of ...
García-Martín E - - 2010
OBJECTIVE: To evaluate the changes over two years in the retinal nerve fibre layer (RNFL) of patients with múltiple sclerosis (MS). To compare the ability of optical coherence tomography (OCT), scanning laser polarimetry (GDx), visual evoked potentials (VEP) and visual field examination to detect axonal loss in these patients. MATERIAL ...
Blich Miry - - 2010
Current guidelines suggest the use of atrial synchronous mode (VDD) pacemakers in patients with atrioventricular (AV) block and normal sinus node function. However VDD mode is being used much less than expected. The objectives of our study were to evaluate the efficacy of VDD pacing in long-term follow-up and to ...
Satomi Kazuhiro - - 2010
Macroreentrant atrial tachycardia (AT) involving the right atrial free wall (RAFW) has been reported in patients without atriotomy. Catheter ablation of these ATs remains challenging due to the multiple morphologies of ATs with unstable reentrant circuits in some patients. The purpose of this study was to clarify the electrophysiological characteristics ...
Payne Ryan A - - 2009
We report our experience with endoscopic ablation of Hunner's lesions in women with interstitial cystitis (IC). A chart review was performed on 14 patients with IC symptoms who were identified to have bladder lesions and underwent endoscopic ablation. A Hunner's lesion was identified as an area of erythema that reproduced ...
Stiles Martin K - - 2010
INTRODUCTION: The area of the functional sinus node complex exceeds that of the anatomical sinus node; however, reasons for this discrepancy are unknown. We aimed to characterize the functional sinus node complex in health and disease with high-density simultaneous mapping. METHODS AND RESULTS: Sinus node activity was characterized in 15 ...
Quaglione Raffaele - - 2010
AIM: Aim of this retrospective study was to analyze the effect of closed-loop stimulation (CLS) and DDD pacing mode on autonomic balance, and to evaluate heart rate variability (HRV) during CLS stimulation. METHODS AND MATERIALS: Autonomic balance was estimated by a 24-hour HRV analysis of paced and spontaneous beats in ...
Erdo?an Ilkay - - 2009
Transesophageal electrophysiologic study (TEEPS) is a semi-invasive method widely used for evaluation of symptoms related to arrhythmia. In this study, we aimed to determine the accuracy of TEEPS in the diagnosis and differentiation of mechanisms of supraventricular tachycardias (SVTs) by comparing results of transesophageal and intracardiac electrophysiologic studies. We performed ...
Thaker Jay P - - 2009
BACKGROUND: Electrical devices generate electromagnetic fields that may interfere with pacemakers. Media players cause telemetry interference with pacemakers, but it is not known whether they cause direct interference with pacemakers. The purpose of this study was to examine the interaction between pacemakers and 3 different media players. METHODS: In this ...
Capulzini Lucio - - 2010
We present the case of a 49-year-old woman with atrioventricular nodal re-entrant tachycardia and a severe pectus excavatum. The patient underwent an electrophysiological study and fast pathway ablation. Fast pathway ablation was not done on purpose but accidentally, likely due to the abnormal position of the heart in the chest ...
Aliyev Farid - - 2010
We present an unusual electrocardiogram obtained from a patient with critically depleted pacemaker.
Balaji Seshadri - - 2009
BACKGROUND: The Mustard operation is a complex atrial rerouting performed in patients with transposition of the great arteries (TGA). Cavotricuspid isthmus (CTI)-dependent atrial flutter (AFL) is an important problem in these patients. While catheter ablation (CA) is successful, three-dimensional (3D) mapping is necessary to prove block at the CTI. 3D ...
Ryu C-W - - 2010
BACKGROUND AND PURPOSE: The falcine sinus has been considered as a rare variation of the venous pathway between the dural layers of the falx cerebri. The purpose of this study was to evaluate the incidence of falcine sinus and its anatomic characteristics by using CTA. MATERIALS AND METHODS: A total ...
Padi Anupama - - 2009
Peripheral and tissue eosinophilia can occur in a wide variety of disease processes that include infectious, allergic, and primary hematologic disorders, and other more rare diseases such as hypereosinophilic syndromes (HES). We describe a case of a patient with severe eosinophilia and left bundle branch block. A 21-year-old woman with ...
Rathbun Chris R CR Department of Clinical and Administrative Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73117, USA. - - 2009
Concurrent atazanavir (ATV) and lopinavir/ritonavir (LPV/r) may be useful for patients with extensive antiretroviral resistance; however, limited information exists concerning the pharmacokinetics and safety of this combination. A parallel-arm pharmacokinetic study was conducted in HIV-infected patients (n = 10) using contemporary formulations of each agent. Intensive pharmacokinetics were conducted at ...
Erdo??an Ilkay - - 2009
BACKGROUND: Radiofrequency ablation has become first-line therapy for supraventricular tachycardia in all age groups, but there has been a concern regarding the long-term effectiveness of the procedure in children. This study aimed to determine the inducibility after successful ablation of supraventricular tachycardia in children; assessment was performed using a transesophageal ...
Wokhlu Anita - - 2009
BACKGROUND: Cardiac resynchronization therapy (CRT) improves outcomes in patients with left bundle branch block (LBBB), but the benefits of CRT in patients with other QRS morphologies or previous pacing are uncertain. OBJECTIVE: The purpose of this study was to describe outcomes in patients with prior right ventricular pacing and non-LBBB ...
González-Torrecilla Esteban - - 2009
OBJECTIVES: The aim of this study was to assess the independent predictive contribution to the electrocardiogram (ECG) of bedside clinical variables to distinguish the major forms of paroxysmal supraventricular tachycardias. BACKGROUND: Atrioventricular nodal re-entrant tachycardias (AVNRTs) and orthodromic reciprocating tachycardias (ORTs), through concealed accessory pathways, are major mechanisms of paroxysmal ...
Sternick Eduardo Back - - 2009
BACKGROUND: Recognition of the presence and role of decremental fibers during wide QRS tachycardia requires carefully executed intracardiac studies. OBJECTIVE: This study sought to determine the value of the atrioventricular (AV) conduction time during pre-excited tachycardia to differentiate a fast from a decrementally conducting accessory pathway (AP). METHODS: Fifty-one patients ...
Lee Young-Soo - - 2009
Because second-degree Mobitz I atrioventricular (AV) block is usually associated with a disturbance at the AV nodal level, and rarely at the infra- or intra-His bundle level, it has been considered as mostly benign in character. We report on a patient with intra-His bundle block in second-degree Mobitz I AV ...
Di Toro Darío - - 2009
AIMS: Reciprocating atrioventricular tachycardia can be categorized into common slow-fast atrioventricular node re-entrant (AVNRT) and orthodromic atrioventricular reciprocating tachycardia (AVRT). The electrocardiogram (ECG) during tachycardia is useful in distinguishing these two mechanisms. The presence of a pseudo-R'-wave in lead V1 or pseudo-S-wave in the inferior leads has been widely used, ...
Aliyev Farid - - 2009
AIMS: Although cases of acute mad honey intoxication have been reported earlier, chronic mad honey intoxication (CMHI) syndrome has not been described and we address this issue only in this study. METHODS AND RESULTS: We prospectively evaluated the history of non-commercial honey intake in all patients referred to our institution ...
Medi Caroline - - 2009
OBJECTIVES: This study aimed to characterize the incidence, clinical and electrophysiologic features, and long-term outcomes of patients with tachycardia-mediated cardiomyopathy (TCM) secondary to focal atrial tachycardia (AT). BACKGROUND: TCM is known to complicate atrial tachyarrhythmias. Little is known of the patient and tachycardia characteristics associated with the development of left ...
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