نتایج جستجو برای: paroxysmal atrial fibrillation
تعداد نتایج: 112980 فیلتر نتایج به سال:
This review highlights the role of atrial monophasic action potential duration (APD) in understanding atrial electrical properties in paroxysmal, persistent, and permanent atrial fibrillation (AF) states. Alternans of APD and rate maladaptation in a spatially divergent way appear mechanistically involved in AF initiation, development, and persistence. The underlying pathophysiology warrants fur...
BACKGROUND Current guidelines recommend pulmonary-vein isolation by means of catheter ablation as treatment for drug-refractory paroxysmal atrial fibrillation. Radiofrequency ablation is the most common method, and cryoballoon ablation is the second most frequently used technology. METHODS We conducted a multicenter, randomized trial to determine whether cryoballoon ablation was noninferior t...
STUDY METHOD The objective of this study was to evaluate the long term efficacy and safety of the atrial fibrillation program at Unity Point Health Methodist in Peoria. METHODS A retrospective analysis was performed on patients who had atrial fibrillation procedures at Unity Point Methodist from February 19 th 2010 to September 26 th 2014. Patients were enrolled and information obtained throu...
BACKGROUND To predict the recurrence of atrial fibrillation is important for selecting patients who will be undergoing catheter ablation, several studies respectively evaluated the risk factor of the recurrence of atrial fibrillation post-ablation. OBJECTIVE To investigate the factors predicting the recurrence of atrial fibrillation (AF) after catheter ablation. METHODS 186 patients (55.12 ...
INTRODUCTION AND OBJECTIVES A new laser balloon that allows visualization of atrial tissue has recently been introduced for pulmonary vein electrical isolation. The aim of this study was to evaluate the mid-term safety and efficacy of this catheter in the treatment of atrial fibrillation. METHODS Laser balloon ablation was performed in 71 patients with paroxysmal (80%) or persistent (20%) atr...
BACKGROUND Together with pulmonary veins, many extrapulmonary vein areas may be the source of initiation and maintenance of atrial fibrillation. The left atrial appendage (LAA) is an underestimated site of initiation of atrial fibrillation. Here, we report the prevalence of triggers from the LAA and the best strategy for successful ablation. METHODS AND RESULTS Nine hundred eighty-seven conse...
To determine whether patients at risk for paroxysmal atrial fibrillation could be detected while in sinus rhythm, the signal-averaged electrocardiogram triggered by P waves was recorded in 42 patients with paroxysmal atrial fibrillation (Paf group) and in 50 control patients. The root mean square voltages (LP10, LP20, and LP30) for the last 10, 20, and 30 msec and the duration (Ad) of filtered ...
This report describes paradoxical atrial undersensing by a dual chamber pacemaker in a patient with paroxysmal atrial fibrillation. Atrial undersensing was present only when the device was programmed to a high sensitivity but sensing normalized when a lower sensitivity was programmed. This unusual response should be differentiated from the recently documented lock-in behavior of pacemakers deli...
A n 84-year-old woman with a medical history significant for hypertension and hyperlipidemia presented with aphasia and was found to have a left parietal subacute infarct with hemorrhagic conversion and a remote right parietal lobe infarct, not previously recognized on computed tomography of the head. Workup included a transthoracic echocardiogram that showed normal left ventricular size, an ej...
OBJECTIVES This study sought to study the change in autonomic tone that precedes the initiation of paroxysmal atrial flutter. BACKGROUND An abrupt change in the autonomic tone of the heart is an important initiating factor in the pathogenesis of ventricular tachyarrhythmias and paroxysmal atrial fibrillation. Whether the autonomic tone has a role in the initiation of paroxysmal atrial flutter...
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