Manuel da Silva

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INTRODUCTION Vagal activity is thought to influence atrial electrophysiological properties and play a role in the initiation and maintenance of atrial fibrillation (AF). In this study, we assessed the effects of acute vagal stimulation (vagus_stim) on atrial conduction times, atrial and pulmonary vein (PV) refractoriness, and vulnerability to induction of(More)
BACKGROUND Cardiac resynchronization therapy (CRT) has significant benefits in selected patients (P). The impact of this modality in the incidence of ventricular tachyarrhythmias remains controversial. We analysed the occurrence of appropriate therapies in P submitted to CRT combined with a cardioverter-defibrillator (ICD). METHODS Study of 123 P with(More)
Acknowledgements I would like to express my special thanks to my advisor Professor Luís Rodrigues who gave me the opportunity to do this thesis and also the vital guidance and motivation. I extend my sincere gratitude to João Paiva for taking part in useful decisions and giving fruitful advices during the execution of all the work and preparation of this(More)
Brugada syndrome is a rare syndrome, with an estimated prevalence in Europe of 1-5/10 000 population, whose initial clinical presentation can be sudden death. Although it has a characteristic electrocardiographic pattern, this can be intermittent. The authors present the case of a 32-year-old man, with no family history of syncope or sudden death, who went(More)
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