Both autonomic nerve activity and electrical remodeling are important in atrial arrhythmogenesis. Therefore, dogs with sympathetic hyperinnervation, myocardial infarction (MI), and complete atrioventricular block (CAVB) may have a high incidence of atrial arrhythmias. We studied eight dogs (experimental group) with MI, CAVB, and sympathetic hyperinnervation induced either by nerve growth factor...

PURPOSE Flecainide is a class 1C antiarrhythmic drug especially used for the management of supraventricular arrhythmia. Flecainide also has a recognized proarrhythmic effect in patients treated for ventricular tachycardia. It is used to treat a variety of cardiac arrhythmias including paroxysmal atrial fibrillation, paroxysmal supraventricular tachycardia and ventricular tachycardia. Flecainide...

Tachycardia-induced tachycardia is a rare condition. We report a case in which an episode of paroxysmal atrial fibrillation led to right ventricular outflow tract tachycardia. We also analyse all potential mechanisms that might contribute to the coexistence of these two different arrhythmias in the same patient.

In six successive patients, none of whom had the Wolf-Parkinson-White syndrome, recurrent episodes of paroxysmal supraventricular tachycardia (SVT) were analyzed to determine the mechanism by which this arrhythmia is initiated and sustained. In each patient, simultaneous intracavitary atrial electrograms and surface electrocardiograms were recorded during the onset of numerous spontaneous episo...

Background: Paroxysmal supraventricular tachycardia (NNKPTT) is the most common clinical occurrence, affecting hemodynamics and causing symptoms of palpitations dyspnea in patients. Of mechanisms that cause paroxysmal tachycardia, atrioventricular nodal re-entry (AVNRT), re-entrant (AVRT), atrial (AT) are difficult to distinguish each other. The electrocardiogram can be used confirm diagnose me...

We studied transient entrainment and interruption of atrioventricular (AV) bypass pathway-type paroxysmal atrial tachycardia in 15 patients during overdrive pacing from selected atrial sites. Overdrive atrial pacing at less than a critically rapid rate for interruption transiently entrained the tachycardia. Transient entrainment was due to repeated early entrance of the wave front from the paci...

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