Search Results
Results 301 - 350 of 1347
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Chen De-you - - 2006
OBJECTIVE: To investigate the effectiveness and safety of various agents on paroxysmal atrial fibrillation in the elderly over 75 years old. METHODS: Totally 264 in-patients (75-91 years old, 185 males and 79 females) with atrial fibrillation history of less than 7 days were enrolled in this study. A total of ...
Vincenti Antonio - - 2006
AIMS: The aim of this study was to evaluate the mechanisms of induction of paroxysmal atrial fibrillation (PAF) by analysis of its onset recorded on Holter monitoring (HM). METHODS AND RESULTS: One hundred and seven HM were evaluated in 90 patients (mean age 67.7, cardiac disease in 31.1%), with one ...
Marraffa Jeanna M - - 2006
Pharmacokinetic studies demonstrate that propoxyphene is a potent inhibitor of cytochrome P450 (CYP) 2D6. Clinically significant sequelae have not been previously reported. We report a case of this inhibition manifested by life-threatening bradycardia in a patient receiving a CYP2D6 substrate, metoprolol. A 48-year-old man came to the emergency department complaining ...
Zareba Karolina M - - 2006
Dronedarone (SR 33589; N,N-dibutyl-3-[4-([2-butyl-5-methylsulphonamido] benzofuran-3-yl-carbonyl) phenoxy]propylamine) is a new synthetic noniodinated derivative of amiodarone that is currently undergoing phase III clinical trials. It demonstrates electrophysiologic patterns similar to amiodarone and shows equivalent efficacy in preventing or converting various ventricular and atrial arrhythmias in laboratory animals. Two phase III trials demonstrated ...
Kaltman Jonathan R - - 2006
We report a case of atrial fibrillation induction after the use of adenosine for the termination of supraventricular tachycardia in the emergency department. Atrial fibrillation is not an uncommon side effect of adenosine administration. Hemodynamic collapse may occur if an antegrade-conducting accessory pathway allows for a rapid ventricular response. Therefore, ...
Matsuura Kaoru - - 2006
BACKGROUND: Although atrial fibrillation is often associated with increased morbidity after open heart surgery, neither the incidence nor the clinical consequences of atrial fibrillation after aortic surgery has been well investigated. The goal of this study was to elucidate the risks for incidence of postoperative atrial fibrillation after aortic arch ...
Verheugt F W A - - 2006
The only major and potentially fatal risk for patients with atrial fibrillation is the development of systemic thromboembolism. Stroke occurs five times more frequently in patients with atrial fibrillation than in comparable patients in sinus rhythm. The yearly incidence of stroke in atrial fibrillation largely depends on the underlying heart ...
Cooke Georga - - 2006
BACKGROUND: Atrial fibrillation in the elderly is common and potentially life threatening. The classical sign of atrial fibrillation is an irregularly irregular pulse. OBJECTIVE: The objective of this research was to determine the accuracy of pulse palpation to detect atrial fibrillation. METHODS: We searched Medline, EMBASE, and the reference lists ...
Garcia David A - - 2006
Warfarin is highly effective at reducing the risk of stroke in atrial fibrillation. The benefit of oral anticoagulant therapy strongly outweighs the risk in most patients with atrial fibrillation. More data are needed to define better the overall risk-to-benefit ratio for patients age 80 years and greater. Because a significant ...
Nattel Stanley - - 2006
Atrial fibrillation is the most common sustained cardiac arrhythmia, and contributes greatly to cardiovascular morbidity and mortality. Many aspects of the management of atrial fibrillation remain controversial. We address nine specific controversies in atrial fibrillation management, briefly focusing on the relations between mechanisms and therapy, the roles of rhythm and ...
Milla Federico - - 2006
OBJECTIVE: Epicardial, beating heart cryoablation for the treatment of atrial fibrillation may be limited by heat from intracardiac blood flow. We therefore evaluated the ability to create cryolesions using an argon-based cryoclamp device, which temporarily occludes blood flow and facilitates transmurality. METHODS: Six mongrel dogs underwent sternotomy. A clamp employing ...
Disertori Marcello - - 2006
BACKGROUND: The possibility of preventing atrial fibrillation recurrence with anti-arrhythmic agents is very limited, given the discouraging results obtained with current drugs in many patients. Data from experimental studies suggest that angiotensin II AT1-receptor blockers can influence atrial remodelling, a key factor in atrial fibrillation initiation and maintenance. Moreover, some ...
Andrews Marc - - 2006
In 2000, some 2.3 million Americans were affected by atrial fibrillation, and that number is expected to rise as our population ages. Atrial fibrillation is both a reflection of active physiologic stressors on the body and a marker of future cardiac disease progression. The disorganized atrial activity that characterizes atrial ...
Huang Chien-Cheng - - 2006
Clinical cases of renal infarction are rarely seen and often either misdiagnosed or initially treated as something else. In most circumstances, renal infarctions are discovered accidentally, not due to a consideration of the diagnosis. A review of the literature reveals that we ought to search for the entity in patients ...
Carey B J - - 2006
BACKGROUND: Carotid sinus massage (CSM) is a useful tool in the investigation of unexplained syncope, but is associated with risks. AIM: To describe the first reported case of atrial fibrillation precipitated by CSM during the investigation of a patient with recurrent unexplained syncope. RESULTS: A 58-year-old female underwent CSM as ...
Kalus James S - - 2006
Atrial fibrillation is very common in the United States. After a search of Medline, EMBASE, and CINAHL, 4 trials evaluating inhibitors of the renin-angiotensin system were identified for prevention of new-onset atrial fibrillation, facilitation of electrical cardioversion of atrial fibrillation, and prevention of atrial fibrillation recurrence after electrical cardioversion. A ...
Ricci R P - - 2006
A large number of patients implanted with dual-chamber pacemakers exhibit symptoms of recurrent or new atrial fibrillation. Scheduling follow-up visits for every 6-12 months in this setting may be disadvantageous on three grounds. First, delayed information about the onset of atrial fibrillation does not allow an immediate reaction with pharmacological ...
Rich Jeffrey B - - 2006
A consortium of cardiac surgeons, nurses, and administrators in Virginia has developed a clinical/financial database to identify sites with best outcomes and replicate best practices statewide. The financial value of quality improvements is estimated from the incremental savings gained by reducing postoperative complications. The group studied 7,417 coronary artery bypass ...
Tang Ri Bo - - 2006
Atrial fibrillation is the most common arrhythmia, however, the mechanism of atrial fibrillation is not well explained. It has been considered that inflammation plays a role in atrial fibrillation, recently. Patients undergoing coronary artery bypass graft are at high risk for developing postoperative atrial fibrillation. The peak levels of C-reactive ...
Knaut Michael - - 2006
AIMS: Operative treatment of atrial fibrillation was initially performed as a maze operation in combination with mitral valve surgery or as a stand-alone procedure. The introduction of simplified ablation procedures led to the extension of operative atrial fibrillation treatment. METHODS AND RESULTS: In 102 consecutive patients, endocardial microwave ablation was ...
Gillinov A Marc - - 2006
BACKGROUND: It is unknown whether pulmonary vein isolation or a complete Cox-Maze procedure is needed to ablate paroxysmal atrial fibrillation in patients with mitral valve disease. Our objective was to assess the impact of different surgical treatments for this arrhythmia in patients undergoing mitral valve surgery. METHODS: From July 1993 ...
Scherlag Benjamin J - - 2006
PURPOSE OF REVIEW: Radiofrequency ablation techniques to cure cardiac arrhythmias have focused on destroying myocardial tissue involved in abnormal excitation or conduction. This review will address recent basic and clinical studies which suggest that targeting autonomic nerves and ganglia on the large vessels and the heart, within the pericardium, can ...
Climent Vicente - - 2006
Although the high rate of success after cardioversion, less than 50% of patients maintain sinus rhythm for the first year. In view for the high percentage of relapse into atrial fibrillation, it is interesting to analyze the relationship between atrial stunning after cardioversion and relapse into atrial fibrillation. Thus, we ...
Wang Chun-Li - - 2006
BACKGROUND: Prior study has demonstrated that the biplane single-beat method could be used to assess left ventricular function during atrial fibrillation at a beat with equal subsequent cycles. The study was to test whether we could improve the method by measuring a few beats with equal subsequent cycles and cycle-length ...
Ziv Ohad - - 2005
Our understanding of the pathophysiology and clinical consequences of atrial fibrillation has led to an evidence-based revolution in the management of atrial fibrillation over the last decade. As we improve in our ability to detect recurrent atrial fibrillation and treat it definitively, the patients who benefit from long-term anticoagulation may ...
Ahmed Ali - - 2005
We studied 944 hospitalized heart failure patients 65 years and older to examine the impact of incident atrial fibrillation on mortality. Patients were categorized into four groups based on past medical history and admission electrocardiogram: (1) no (neither past nor current), (2) incident (newly diagnosed), (3) past and (4) chronic ...
Bertaglia Emanuele - - 2005
Typical atrial flutter is readily abolished by creating a line of block along the isthmus between the tricuspid annulus and the inferior vena cava. However, postablation atrial fibrillation occurs frequently, and its occurrence increases during the follow-up. Preablation atrial fibrillation is the most important risk factor for postablation atrial fibrillation ...
Budeus Marco - - 2006
AIM: The recurrence of atrial fibrillation after cardioversion was a general problem in medical practice. METHODS: We wanted to test the hypothesis that the recurrence of atrial fibrillation could be predicted by measurements of P wave triggered P wave signal averaged ECG and chemoreflexsensitivity (CHRS) in 118 consecutive patients one ...
Mozaffarian Dariush - - 2006
Fish intake is associated with improved cardiovascular health, including a lower risk of arrhythmic death, atrial fibrillation, and heart failure. However, the physiologic effects that may produce these cardiovascular benefits are not well-established. We investigated the cross-sectional associations between a usual dietary intake of fish during the previous year and ...
Woo Gregory W - - 2006
We report 3 cases of late-onset atrial fibrillation several years after cardiac transplantation, each involving left ventricular systolic dysfunction in the absence of cardiac rejection or cardiac allograft vasculopathy. Although the etiology of late-onset atrial fibrillation in cardiac transplant recipients is not clear, its presence in the absence of cardiac ...
Singh Harshinder - - 2005
Transesophageal echocardiography (TEE) is an established cardiovascular diagnostic technique. Left atrial (LA) size, as measured by transthoracic echocardiography (TTE), is associated with cardiovascular disease and is a risk factor for atrial fibrillation, stroke, death, and the success of cardioversion. Assessment of LA size has not been as well validated on ...
Brandt Nicole J - - 2005
An 81-year-old female presented with weight loss as a result of her multiple comorbidities, including a history of congestive heart failure (CHF), coronary artery disease, paroxysmal atrial fibrillation, myocardial infarction, pulmonary embolism, and stroke. She has experienced deep-venous thrombosis in her right leg, severe depression, and dementia and also has ...
Raghavan Arun V - - 2005
Although atrial fibrillation remains the most common cardiac arrhythmia, the treatment and disposition remain varied. An accept-able standard of practice requires an evidence-based approach. This approach has revealed that half of the patients who present with acute atrial fibrillation will convert to sinus rhythm without intervention. In the hemodynamically stable ...
Gillinov A Marc - - 2005
OBJECTIVES: The Cox maze procedure is the gold standard for ablation of atrial fibrillation in patients undergoing mitral valve surgery, and new approaches to atrial fibrillation ablation must be compared with it. Therefore, we sought to determine the time-related prevalence of atrial fibrillation and its risk factors after combined Cox ...
Mitchell A R J - - 2005
Atrial fibrillation is the most common clinical arrhythmia and with an ageing population, it is an increasing cause of hospital admissions, morbidity and mortality. The most feared complication of atrial fibrillation is stroke. A number of studies have demonstrated that warfarin is at least moderately effective at reducing thromboembolic risk ...
Dobrilovic N - - 2005
AIM: To evaluate the prophylactic effect of diltiazem on the incidence of atrial arrhythmia (fibrillation and/or flutter) following coronary artery bypass grafting (CABG). Data were retrospectively gathered. METHODS: Patients undergoing elective CABG by one surgeon at one institution over a three-year period were considered for inclusion. Those selected were divided ...
Kirilmaz Ata - - 2005
Twelve-lead electrocardiograms revealed fine atrial fibrillation and a short QT interval (SQTI) (<300 milliseconds) with an average ventricular rate of 54/min in a 20-year-old male presented with exertional dyspnea. His echocardiographic evaluation revealed interatrial septal aneurysm and slightly dilated pulmonary artery. An electrophysiologic study revealed atrial fibrillation with a very ...
Kondrat'ev B Y - - 2005
Experimental atrial fibrillation in intact rats significantly decreased the content of catecholamines in atrial adrenergic fibers and phosphorylase activity, which attests to enhanced glycogen consumption in the heart. These changes were specific of the fibrillating myocardium and atria, but were absent in the ventricles. Induced atrial fibrillation did not modify ...
Pelosi Frank F - - 2005
The number of patients with atrial fibrillation and congestive heart failure has steadily increased in the United States. The presence of atrial fibrillation increases morbidity and mortality for patients with left ventricular dysfunction. The emergence of cardiac resynchronization therapy to improve symptoms and survival from congestive heart failure may provide ...
Deepak Sasalu Marulasiddappa - - 2005
Carotid sinus massage is widely used to detect carotid sinus hypersensitivity in patients presenting with syncope. Although generally safe, the risks associated with the procedure may not be fully appreciated by either the patient or the attending medical staff. We present the case of a patient who developed ventricular fibrillation ...
Aasbo Johan D - - 2005
BACKGROUND: Although evidence supports the prophylactic use of beta-blockade in cardiac surgery, postoperative atrial fibrillation or flutter occurs in 40% to 60% of patients. Trials that assessed whether amiodarone prophylaxis decreases the incidence of postoperative atrial tachyarrhythmias have had mixed results and were not specifically powered to detect changes in ...
Lozano Hector F - - 2005
Atrial fibrillation is one of the most frequent heart rhythm disturbances found in clinical practice. Anticoagulation, rate control, cardioversion, and ablative procedures have been the mainstay of treatment. The frequent recurrence of atrial fibrillation and the side effects when antiarrhythmic drugs are used have led to dissatisfaction with available treatment ...
Leonardi Marino - - 2005
PURPOSE OF REVIEW: This review summarizes current concepts on the pathophysiology of atrial fibrillation, identifying predisposing factors to guide primary and secondary preventive approaches. RECENT FINDINGS: Many factors contribute to the development and progression of atrial fibrillation, including cardiovascular diseases, age, neurohormones, genetics, diet, autonomic influences, and inflammation. Therapeutic efforts ...
Wyse D George - - 2005
Rhythm management for atrial fibrillation is a subject of intense interest. In this review, the two main strategies for rhythm management in atrial fibrillation, the "heart rate control" strategy and the "heart rhythm control" strategy, are discussed under several headings. Some of the basic issues surrounding heart rate control and ...
Wang Chun-Li - - 2005
Single-beat determination of left ventricular systolic function at a beat with equal subsequent cardiac cycles has been proposed as an accurate method in atrial fibrillation. However, there has still been substantial variability between the values calculated from beats with equal subsequent cycles. Therefore, some refinement on the single-beat method is ...
Zapolski Tomasz - - 2005
INTRODUCTION: Stunning of the left atrium and atrial appendage is a well known but not fully clarified phenomenon observed during the cardioversion of atrial fibrillation regardless of the cardioversion method attempted. AIM: To assess the effects of propafenone and amiodarone on left atrium and left atrial appendage contractility. METHODS: Forty ...
Carasso Shemy - - 2006
AIM: We present two patients with a large left atrial (LA) thrombus following invasive treatment for atrial fibrillation and inadequate anticoagulation. METHODS AND RESULTS: Case 1: A 30-year-old woman, with a one-year history of symptomatic paroxysmal atrial fibrillation resistant to medical therapy, underwent catheter ablation for atrial fibrillation. Three days ...
Schuchert A - - 2005
Atrial fibrillation and heart failure have in common that they mainly occur in older patients and the patients have similar underlying heart diseases. The prevalence of atrial fibrillation in heart failure patients varies from 10% to 30%. There are conflicting data whether the presence of atrial fibrillation is an independent ...
Zapanta Conrad M - - 2005
Many patients who receive a prosthetic heart valve also have or acquire cardiac arrhythmias. However, most in vitro studies of prosthetic valves examine them under normal rhythms. In this study, a monoleaflet prosthetic heart valve was tested in vitro under conditions that simulated normal sinus rhythm, first degree atrioventricular heart ...
Fleisher Lee A - - 2005
Atrial fibrillation remains a common and challenging problem following cardiac surgery. The American College of Chest Physicians, through the Health and Science Policy Committee, established a panel to develop a set of clinical practice guidelines for the management or prophylaxis of atrial fibrillation or flutter in patients undergoing coronary artery ...
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