Search Results
Results 701 - 750 of 1024
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Bollmann Andreas - - 2002
BACKGROUND: While there is agreement that verapamil attenuates the AF- induced refractory period shortening when given before AF induction, controversy exists regarding its effects when given after the onset of persistent AF. This study aimed to compare atrial fibrillatory frequency obtained from the surface ECG in patients with persistent atrial ...
Mamoni R L RL Department of Clinical Pathology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), SP, - - 2002
Paracoccidioidomycosis (PCM) occurs in two distinct forms, the acute or juvenile form (JF), and the chronic or adult form (AF). To clarify the basis of this dichotomy, specific IgG subclasses, IgA and IgE anti-gp43 were measured by enzyme-linked immunosorbent assay, in patients with different forms of PCM. Serum levels of ...
Akdemir Ilyas - - 2002
Silent brain infarction (SBI) is defined as asymptomatic infarction areas detected in computerized tomography (CT) scans in patients without a history of stroke. The incidence of SBI is increased in CT or magnetic resonance imaging in patients with carotid stenosis and with atrial fibrillation (AF), but its relation with rheumatic ...
Hamada Takashi - - 2002
INTRODUCTION: Paroxysmal atrial fibrillation (PAF) frequently occurs in patients with Wolff-Parkinson-White (WPW) syndrome. To elucidate the mechanisms for PAF, we performed electrophysiologic studies (EPS) before and after ablation of accessory pathways (APs). METHODS AND RESULTS: We investigated 24 patients with WPW syndrome who had AV reciprocating tachycardia and prior PAF ...
Nakagawa Keiko - - 2002
OBJECTIVES: To determine the relationship between spontaneous echocardiographic contrast (SEC) in the descending thoracic aorta and plasma levels of hemostatic markers in patients with nonrheumatic atrial fibrillation (AF). DESIGN AND SETTINGS: A cross-sectional study at a university hospital. PATIENTS AND MEASUREMENTS: In 91 consecutive patients (mean +/- SE age, 70 ...
Ross J R - - 2002
We performed a prospective study of hospice in-patients requiring a syringe driver (SD), to determine the site duration and tolerability of metal butterfly needles compared to Teflon cannulae. Using patients as their own control, prescribed medications were divided equally between two SDs (Graseby MS16a), for delivery over 24 h. A ...
Clavier L - - 2002
A method is presented for automatic analysis of the P-wave, based on lead II of a 12-lead standard ECG, in resting conditions during a routine examination for the detection of patients prone to atrial fibrillation (AF), one of the most prevalent arrhythmias. First, the P-wave was delineated, and this was ...
Barbaro V - - 2002
A new index of synchronisation (IS) between the electrical activity of pairs of close atrial sites during atrial fibrillation (AF) is introduced. The index assesses the probability of finding synchronous activations in intra-atrial bipolar electrograms and is based on the assumption that two activations closely spaced in time are likely ...
Chung M K - - 2001
BACKGROUND: Atrial fibrillation (AF) may persist due to structural changes in the atria that are promoted by inflammation. C-reactive protein (CRP), a marker of systemic inflammation, predicts cardiovascular events and stroke, a common sequela of AF. We hypothesized that CRP is elevated in patients with atrial arrhythmias. METHODS AND RESULTS: ...
Lip G Y - - 2001
There has been a tendency to treat paroxysmal atrial fibrillation (PAF) in a similar way to sustained AF, but treatment objectives may be very different. We discuss current definitions, epidemiology, pathophysiology and natural history of PAF, and review evidence for its treatment and management. PAF comprises between 25% and 62% ...
Chang K C - - 2001
The initiation of focal atrial tachycardia (AT) from the superior vena cava (SVC) remains unclear. In 3 patients (2 females, 1 male; aged 57, 66 and 50 years, respectively) with focal AT arising from different parts of the SVC, the AT occurred spontaneously, rather than being induced by electrical stimulation. ...
Pappone C - - 2001
BACKGROUND: Circumferential radiofrequency ablation around pulmonary vein (PV) ostia has recently been described as a new anatomic approach for atrial fibrillation (AF). METHODS AND RESULTS: We treated 251 consecutive patients with paroxysmal (n=179) or permanent (n=72) AF. Circular PV lesions were deployed transseptally during sinus rhythm (n=124) or AF (n=127) ...
Neunteufl T - - 2001
Patients with polycythaemia vera (PV) are at increased risk of developing arterial and venous thromboembolic complications. We investigated whether endothelium-dependent, flow-mediated vasodilatation (FMD) is impaired in PV patients without clinical evidence of artery disease as observed in patients with conventional cardiovascular risk factors. FMD and endothelium-independent, nitroglycerine-induced vasodilatation (NMD) were ...
Lepage, Ronan
This paper presents an automatic analysis method of the P-wave, based on lead II of a 12 lead standard ECG, which will be applied to the detection of patients prone to atrial fibrillation (AF), one of the most frequent arrhythmias. It focuses first on the segmentation of the electrocardiogram P-wave, ...
Brembilla-Perrot B - - 2001
Sudden death might be the first event in patients with asymptomatic WPW. The purpose of the study was to know if the age of the patient modifies the electrophysiological characteristics of asymptomatic WPW. Transesophageal stimulation was performed on 92 asymptomatic WPW patients from the following age groups: 10-69 years (n ...
Pignalberi C - - 2001
BACKGROUND: Paroxysmal atrial tachyarrhythmias have been frequently detected in patients paced for atrioventricular block. However, it is not yet clear which is the actual incidence of such arrhythmias and if they were preexisting but not recognized, or if they could be related to the device. METHODS: One hundred and forty-five ...
Zrenner B - - 2001
OBJECTIVES: The aim of the study was to analyze the electrophysiologic characteristics of paroxysmal (PAF) and chronic (CAF) atrial fibrillation (AF) in the human right atrium (RA). BACKGROUND: Differences that exist between PAF and CAF and the mechanisms of self-sustenance of these arrhythmias are incompletely understood. METHODS: A total of ...
Akyürek O - - 2001
Intraatrial conduction delay in atrial fibrillation (AF) that is considered a component of atrial electrical remodeling has been demonstrated previously in experimental models and it is considered an important factor for the induction or stabilization of AF. However, it is not known if this phenomenon exists in human AF. The ...
Platonov P G - - 2001
BACKGROUND: Recent reports suggest the presence of conduction delay in the posterior septal region during sinus rhythm in patients with lone paroxysmal atrial fibrillation (AF). OBJECTIVE: To explore the location of intra-atrial conduction delay associated with initiation of AF. DESIGN: In 8 lone AF patients (51 +/- 10 years), 20 ...
Bagai Jayant - - 2001
The conversion of atrial fibrillation (AF) to normal sinus rhythm should be attempted in patients who present with this condition, as long as the cure is not worse than the disease itself. In young patients with normal hearts, AF has a small impact on morbidity and mortality. The primary indication ...
Moncrieff J - - 2001
Atrial fibrillation (AF) is a common arrhythmia associated with increased morbidity and mortality. Current practice aims to restore sinus rhythm (SR), although the question of whether rate or rhythm control is the optimal approach for these patients remains unanswered. The most established method of restoring SR in patients with AF ...
Michl P - - 2001
The molecular etiology of Polycythemia vera (PV) is still undetermined. Recently, enhanced tyrosine phosphorylation of the insulin-like growth factor-I receptor (IGF-IR) has been shown in PV bone marrow progenitors and peripheral blood mononuclear cells (PBMNC), and elevated levels of IGF binding protein-1 (IGFBP-1) in the serum of PV patients have ...
Manios E G - - 2001
INTRODUCTION: The objective of this study was to investigate the temporal changes in sinus node function in postcardioversion chronic atrial fibrillation (AF) patients and their possible relation with the recurrence rates of AF. METHODS AND RESULTS: In 37 chronic AF patients, internally cardioverted to sinus rhythm, corrected sinus node recovery ...
Borges L H - - 2001
To assess the effect of highly active antiretroviral therapy (HAART) on cytomegalovirus (CMV) antigenaemia in AIDS patients, 70 patients with CD4+ cell counts < or = 50/mm3 and positive anti-(CMV) immunoglobulin G (IgG) were tested at 15-30 day intervals for CMV antigenaemia. We selected those patients who had been followed ...
Lloyd J R - - 2001
BACKGROUND: Microdermabrasion is a superficial peeling modality that has become quite popular with our patients and the media. OBJECTIVE: To evaluate the use of microdermabrasion in patients with acne. METHODS: Twenty-five patients with grade II-III acne were enrolled into this pilot study. All patients were under dermatologic care and were ...
Ross M A - - 2001
STUDY OBJECTIVE: We sought to determine whether sharing an observation unit with scheduled procedure patients would maintain a more consistent unit census and patient/nurse ratio. A secondary objective was to determine the effect of this model on patient length of stay and discharge rates. METHODS: This retrospective, descriptive study was ...
Takahashi N - - 2001
BACKGROUND: Although there have been many studies on the effects of atrial fibrillation (AF) on cardiac function, few studies have been done on its effects on endothelial function. The present study was designed to examine the effects of AF on endothelial function in human subjects. METHODS AND RESULTS: Changes in ...
Ueng K C - - 2001
INTRODUCTION: The precise role of irregular ventricular response in atrial fibrillation (AF) has not been fully elucidated. This study examined the independent effects of rhythm regularity in patients with chronic AF. METHODS AND RESULTS: This study included 50 patients who had chronic lone AF and a normal ventricular rate. Among ...
Toczolowski J - - 2001
PURPOSE: The study focuses on the problem of self-concept change in patients after radial keratotomy. METHODS: Twenty-five patients (17 female, 8 male) were studied from 6 to 18 months after radial keratotomy using the Adjective Check List by Gough and Heilbrun with the application of double instruction. It concerned self-concept ...
Brundel B J - - 2001
OBJECTIVES: Our purpose was to determine whether patients with persistent atrial fibrillation (AF) and patients with paroxysmal AF show alterations in potassium channel expression. BACKGROUND: Persistent AF is associated with a sustained shortening of the atrial action potential duration and atrial refractory period. Underlying molecular changes have not been studied ...
Pearson T C - - 2001
By definition, idiopathic erythrocytosis (IE) applies to a group of patients characterised by having a measured RCM above their predicted normal range (an absolute erythrocytosis) and following investigation do not have a form of primary or secondary erythrocytosis. Patients with IE are heterogenous. The possibilities include physiological variation, 'early' polycythaemia ...
Zimmermann M - - 2001
INTRODUCTION: This study was designed to analyze dynamic changes in autonomic tone preceding the onset of sustained atrial arrhythmias in patients with focal atrial fibrillation (AF) to determine why patients with frequent discharge from the arrhythmogenic foci develop sustained AF. METHODS AND RESULTS: Holter tapes from 13 patients (10 men ...
Ollé-Goig J E - - 2001
SETTING: Artibonite Valley, a rural area in Haiti. OBJECTIVE: To evaluate a tuberculosis control program in rural Haiti and to compare two strategies for treatment implemented in two areas that were not chosen at random: treatment delivered at the patients' homes observed by former tuberculosis patients (DOT), and non observed ...
Geleris P - - 2001
OBJECTIVES: The purpose of the study was to determine the likelihood of spontaneous conversion of recent onset (< 24 hr) paroxysmal atrial fibrillation (Af) to sinus rhythm and to define clinical and echocardiographic characteristics which may predict it. METHODS: One hundred fifty-three consecutive adult patients admitted to the hospital with ...
Li, Z
To study the role of the dispersion of atrial repolarization (DAR) in the genesis of atrial fibrillation (AF), monophasic action potentials (MAP) were recorded simultaneously from a catheter at the high lateral right atrium (HLRA) and a catheter moving around the high, middle and low lateral right atrium (RA) the ...
Michelucci A - - 2001
Aim of this study was to investigate the spatial patterns of organization of fibrillation in the right atrium using bipolar recordings from a basket catheter. Study population consists of 17 patients with persistent atrial fibrillation (AF), selected a priori for low energy internal cardioversion. Organization was measured by the number ...
Schweikert R A - - 2001
Atrial premature depolarizations (APDs) originating from focal sites, particularly the pulmonary veins (PV), may become triggers of atrial fibrillation (AF). Accurate mapping of APDs with conventional methods may be time consuming and expose the patient to unnecessary instrumentation of the left atrium. We hypothesized that the atrial activation sequence recorded ...
Lombardi F - - 2001
OBJECTIVES: The study evaluated the role of the autonomic nervous system in atrial fibrillation (AF) recurrence. BACKGROUND: Early recurrence of AF after cardioversion (CV) is attributed to electrical remodeling. The possibility that an abnormal autonomic modulation might contribute to this phenomenon has not yet been adequately tested. METHODS: We analyzed ...
Turchetti V - - 2001
The aim of this study was to evaluate coagulative and hemorheologic assessment in patients with dilatative cardiomyopathy with or without spontaneous echo contrast (SEC). We studied 45 patients, 35 males and 10 females (mean age 72.1 +/- 9.2). We measured whole blood viscosity, plasmatic fibrinogen, prothrombin time (PT), activated partial ...
Poldermans D - - 2001
STUDY OBJECTIVE: To assess the long-term prognostic value of dobutamine stress echocardiography (DSE) for cardiac events (cardiac death, myocardial infarction, and late revascularization) in patients with atrial fibrillation (AF). METHODS: Baseline ECGs were studied in patients undergoing DSE between 1989 and 1998. Sixty-nine patients had AF before DSE. Prognostic value ...
Boriani G - - 2001
BACKGROUND: Low-energy internal atrial cardioversion is a relatively new technique based on delivery of intracardiac shocks through transvenous catheters placed into the atria or the vessels. OBJECTIVE: The aim of this study was to assess in older and younger patients with chronic persistent atrial fibrillation (AF) the efficacy and safety ...
Abdel-Maboud A I - - 2000
A total prevalence of cryptosporidiosis was carried out on 1087 diarrheal patients of all age groups attending the outpatient clinics using modified Ziehl-Neelsen stain (MZN) and Meriflour direct immunofluorescent technique (IFA). IFA was more sensitive, specific and gave positive results 19.5% than MZN stain which gave a positivity 13.5% Cases ...
Leclercq J F - - 2000
Long-term prevention of atrial fibrillation is not constantly realized by single-site right atrial pacing, and the beneficial role of multisite atrial pacing is still being studied. Accordingly, we compared the effectiveness of dual site and single site atrial pacing in 83 patients (50 men, 33 women, aged 69 +/- 10 ...
Dos Santos J J - - 2000
PURPOSE: To compare the advantages/disadvantages concerning patient subjective preferences of splints made with heat-cured acrylic (Splint Resin Polymer) or visible light-cured material. MATERIAL AND METHODS: A questionnaire was developed assessing: comfort, stability, fit, taste, occlusal contacts, lip seal, smoothness, hygiene, color stability, stain resistance, salivation level, gingival irritation, bulkiness and ...
Vázquez E - - 2000
BACKGROUND: The consequences of atrial fibrillation (AF) on morbido-mortality of patients on hemodialysis have not been fully explored. The objective of this study was to determine the prevalence of AF in patients on hemodialysis and to evaluate its influence on the development of thromboembolic phenomena (TEP). METHODS: The incidence of ...
Sjö N - - 2000
PURPOSE: To determine morphological and clinical characteristics of conjunctival papilloma. METHODS: Specimens of conjunctival papilloma registered during the period 1983-1997 were collected. For each case the patient's sex and age, number of papillomas/patient, seasonal debut, duration, number of recurrences, localisation and presence of dysplasia andlor inflammation in the papilloma were ...
Takahashi R - - 2000
The purpose of this study was to evaluate the clinical significance of residual slow cavotricuspid isthmus (IT) conduction on the ablation line after typical atrial flutter (AF) ablation, undetected by analysis of right atrial (RA) activation. Seventy patients with AF underwent IT ablation. In the first 35 patients (group I), ...
Thamilarasan M - - 2000
Transesophageal echocardiography has given new insight into the pathogenesis of the thromboembolic sequelae of AF and expanded the available therapeutic options. Studies to date indicate that TEE-guided cardioversion is a safe and reasonable approach when the clinical situation warrants prompt restoration of sinus rhythm. Whether widespread use of this strategy ...
Gasparini M - - 2000
Sudden cardiac death (SCD) has been reported in patients with drug refractory AF who underwent AV nodal ablation and pacing. However, whether SCD in these patients is related to the underlying heart disease or to the ablating and pacing procedure remains uncertain. Between May 1987 and January 1997, AV nodal ...
Lenz T L - - 2000
Dofetilide is a new antiarrhythmic agent recently approved for the conversion of and maintenance of sinus rhythm in patients with atrial fibrillation (AF) and atrial flutter (AFl). Dofetilide is a selective class III antiarrhythmic drug which works by selectively blocking the rapid component of the delayed rectifier outward potassium current ...
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