Jorge González-Zuelgaray

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Stroke is a leading cause of morbidity and mortality worldwide. Atrial fibrillation (AF) is an independent risk factor for stroke, increasing the risk five-fold. Strokes in patients with AF are more likely than other embolic strokes to be fatal or cause severe disability and are associated with higher healthcare costs, but they are also preventable. Current(More)
OBJECTIVE To evaluate the cost-effectiveness and cost-utility of the cardioverter-defibrillator (ICD) among patients who are at risk for sudden death in Argentina, from three scenarios: public health, social security and private sector. METHODS We developed a Markov model to evaluate the survival, quality of life and cost of the prophylactic implantation(More)
The purpose of this prospective study was to analyze the natural history of patients with clinical neurocardiogenic syncope. The results obtained with some therapeutic strategies in the prevention of neurocardiogenic syncope are encouraging. However, the benefit they represent when compared with the natural history of syncope has not been clearly(More)
As the head-up tilt test (HUT) is employed to verify the efficacy of undertaking a treatment, we prospectively evaluated the reproducibility of positive and negative results, as well as that of the response type in 64 consecutive patients (mean age 34.6 +/- 22.9 years) with syncope of unknown cause. Two HUTs (60 min, 75 degrees), separated by an interval of(More)
Twenty-five patients underwent transcatheter right bundle ablation either for bundle branch reentrant tachycardias or inadvertent or deliberate right bundle ablation during atrioventricular junctional ablation for rate control. Electrophysiologic data and 12-lead electrocardiograms before and after right bundle ablation were available in all patients.(More)
AIMS This cross-sectional study evaluated the application of accepted international implantable cardioverter defibrillator (ICD) guidelines for primary prevention of sudden cardiac death in patients with heart failure. METHODS AND RESULTS The PLASMA (Probabilidad de Sufrir Muerte Arritmica) study was designed to characterize management of cardiac patients(More)
AIMS Sleep apnoea has significant medical implications. A reliable non-invasive method (as a regular Holter system with a specific software) would be valuable for the screening of this condition in ambulatory patients. METHODS AND RESULTS A total of 40 patients were divided into two groups: Group I, 20 patients with clinical suspicion of obstructive sleep(More)
INTRODUCTION AND OBJECTIVES We sought to demonstrate the mode of spontaneous onset of sustained monomorphic ventricular tachycardia in patients with Chagas' cardiomyopathy. METHODS We studied 222 stored electrograms in 14 patients with Chagas cardiomyopathy and spontaneous monomorphic ventricular tachycardia treated with a cardioverter defibrillator.(More)
An infant presented with neonatal syncope and seizures. An ECG showed a preexcitation pattern, most compatible with Wolff-Parkinson-White (WPW) syndrome. Rhythm monitoring during an event demonstrated prolonged periods of complete AV block with no ventricular escape mechanism. We postulated that ventricular asystole was initiated by mechanical or autonomic(More)
The present study analyzed the recurrence rate of idiopathic atrial fibrillation (AF) after elimination by radiofrequency ablation of the substrate for a regular tachycardia. Forty consecutive patients with idiopathic AF and a history of regular palpitations or documented regular tachyarrhythmias were prospectively included. Regular tachyarrhythmias were(More)