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Despite the progress in the knowledge of the pathophysiology of the atrial fibrillation (AF), the pharmacologic and non pharmacologic approach to prevent and control this arrhythmia has been shown to be discouraging. In the past few years a new type of AF has been described, of which the focal mechanism -especially bound to the pulmonary veins- allows ablation treatment through the radiofrequency (RF) with a catheter. We present our initial experience with this type of method, in two young patients who suffered from multiples episodes of AF and resistance to the conventional treatment. In both patients the RF ablation was done in the left superior pulmonary vein. One of them received an ablation in only one focus, and the other needed a veno-atrial disconnection through the elimination of the pulmonary venous potential from this vein. After three month of follow-up, patients remain asymptomatic with no relapse.

Introduction and Objective: Cardiovascular disease is the leading cause of death in women. Approximately one of every two women will die of some cardiovascular event, such as myocardial infarction. Thereby, the significance of discarding or confirming coronary artery disease in women presenting with chest pain. The objective of this trial was to demonstrate that on the bases of the Douglas and Ginsburg's clinic screening, it is possible to predict the existence of coronary artery disease in the angiography., Material and Methods: For this research only women with angina pectoris were included. These were 189 patients (cineangiographies) whose clinical determinants and angiographic findings were related., Results: Taking in to account the estimated likelihood, there was a low-risk group A with 29 patients, a moderate-risk group B with 55 patients and a high-risk group C with 105 patients. There was no significant coronary artery disease in the first group, there was a significant coronary artery disease in 13 patients in the second group and 72 patients in the third group. Group A had 0%, 72%, 0% and 47%, group B 15.2%, 59.6%, 23.6% and 46.3%, and group C had 84.7%, 68.3%, 68.5% and 84.5%, of sensibility, specificity, positive and negative predictive value, respectively., Conclusion: The usage of the Douglas and Ginsburg's clinic Screening is very effective at the time of deciding whether to perform a coronary angiograpy or not, and it has very good correlation between the probability degree and the presence of coronary artery disease in the coronary angiography.

Tachycardia-induced tachycardia is the phenomenon in which one tachycardia degenerates into another. Few data are available in patients suffering from AV nodal reentrant tachycardia an atrial fibrillation. For related to AV nodal reentrant triggered by tachycardia; there is a possible effective treatment by eliminating the slow nodal pathway, with radiofrequency ablation, as shown by other authors. In this study we present data on three patients with repeated episodes of documented atrial fibrillation and at least one episode of AV nodal reentrant tachycardia or regular palpitations. Radiofrequency ablation of the slow AV nodal pathway was successfully performed in both, and at a follow up of 6, 9 and 10 months, respectively, no new episode of AV nodal reentrant tachycardia or atrial fibrillation was documented.