نتایج جستجو برای: left mitralvalve atrial fibrillation
تعداد نتایج: 369149 فیلتر نتایج به سال:
OBJECTIVE To determine the frequency of Left Atrial thrombus in patients suffering from severe mitral stenosis with atrial fibrillation. METHODS A cross sectional descriptive type study was conducted in the Echocardiography department of the National Institute of Cardio Vascular Diseases (NICVD) Karachi from October 1, 2007 to March 17, 2008. A total of 100 consecutive adult patients with sev...
Background: Atrial fibrillation is a relatively common arrhythmia often seen in patients with permanent pacemakers. In patients with underlying left ventricular dysfunction, single chamber right ventricular pacing increases the incidence of heart failure and atrial fibrillation [1]. But, in patients with normal baseline cardiac function, these effects are not clearly defined. Therefore, with th...
ATRIAL FIBRILLATION is the characteristic arrhythmia of the advanced stages of mitral stenosis, being present in 40 per cent of such cases. Paradoxically, mitral valve surgery, which relieves the obstruction and reduces the hemodynamic overload of the left atrium, frequently precipitates either transient or permanent atrial fibrillation. The reported incidence of this disorder after mitral oper...
BACKGROUND Atrial fibrillation is the most common complication after myocardial revascularization, and it increases morbidity/mortality. OBJECTIVE The purpose of this prospective randomized study was to test the hypothesis that temporary biatrial pacing is effective in reducing the incidence of postoperative atrial fibrillation after myocardial revascularization. METHODS Ninety-eight non-co...
BACKGROUND Among patients with ischemic stroke and atrial fibrillation, which ones are at high risk of recurrent stroke is unclear. This study aimed to determine whether left atrial size was associated with long-term risk of stroke recurrence in patients with nonvalvular atrial fibrillation. METHODS AND RESULTS In this multicenter prospective cohort study, nonvalvular atrial fibrillation pati...
In the last decade, there has been increasing evidence that comprehensive evaluation of the left atrium is of utmost importance. Numerous studies have clearly demonstrated the prognostic value of left atrial volume for long-term outcome. Furthermore, advances in catheter ablation procedures used for the treatment of drug-refractory atrial fibrillation require the need for detailed knowledge of ...
BACKGROUND Left ventricular contractility in atrial fibrillation is known to change in a beat to beat fashion, but there is no gold standard for contractility indices in atrial fibrillation, especially those measured non-invasively. OBJECTIVE To determine whether the non-invasive index of contractility "preload-adjusted PWR(max)" (maximal ventricular power divided by the square of end diastol...
INTRODUCTION Accurate discrimination of atrial and pulmonary vein potentials recorded circumferentially within the pulmonary veins is important when performing segmental isolation of the pulmonary veins in patients with atrial fibrillation. METHODS AND RESULTS Twenty patients with paroxysmal atrial fibrillation underwent pulmonary vein mapping with a decapolar Lasso catheter during sinus rhyt...
To study whether atrial fibrillation might produce local changes in the atrium which could facilitate the tendency of this arrhythmia to become chronic and self-perpetuating, we compared the effect of atrial fibrillation, atrial pacing, and acute volume loading on the perfusion and oxygen consumption of the atrium in anesthetized dogs. Measurement of atrial perfusion with microspheres indicates...
Ninety patients undergoing coronary bypass surgery were studied prospectively by bedside and subsequent ambulatory electrocardiographic monitoring to investigate the incidence, possible causes, and prevention of atrial fibrillation. Patients with good left ventricular function were divided randomly into a control group or groups treated with digoxin or propranolol. In the control group the inci...
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