نتایج جستجو برای: ectopic atrial tachycardia
تعداد نتایج: 134161 فیلتر نتایج به سال:
A 25-year-old woman with a 5-year history of paroxysmal supraventricular tachycardia underwent an electrophysiologic procedure. The baseline sinus cycle length, atrial–His-bundle (AH) interval, and His-bundle–ventricular (HV) interval were 750, 60, and 50 msec, respectively. Paroxysmal supraventricular tachycardia with a cycle length of 320 msec was induced by programmed atrial stimulation with...
Focal atrial tachycardias and atrial flutter represent a considerable part of the arrhythmias treated by electrophysiologists worldwide. Antiarrhythmic drug therapy might control these arrhythmias. Unfortunately, in many cases this therapy is fraught with side effects or ar-rhythmias recur. With the advent of invasive electrophysiology, an increasing number of these substrates are becoming amen...
BACKGROUND Post ablation atrial tachycardias are characterized by low-voltage signals that challenge current mapping methods. Ripple mapping (RM) displays every electrogram deflection as a bar moving from the cardiac surface, resulting in the impression of propagating wavefronts when a series of bars move consecutively. RM displays fractionated signals in their entirety thereby helping to ident...
Ectopic automatic atrial tachycardia in children: Clinical characteristics, management and follow-up
Transcatheter ablation of ectopic atrial tachycardia in young patients using radiofrequency current.
BACKGROUND Rapid atrial activation causes electrical remodeling that promotes the occurrence and the maintenance of atrial fibrillation (AF). Although remodeling has been shown to alter electrophysiological variables, the spatial uniformity of these changes is unknown. METHODS AND RESULTS Dogs subjected to rapid atrial pacing (400 bpm) for 24 hours (n=12) were compared with sham-operated dogs...
Seventy five years after Lewis documented aberrant intraventricular conduction, this phenomenon continues to intrigue the clinician and investigator alike. Differentiation of ventricular tachycardia and aberration with all its diagnostic and therapeutic implications is often elusive and continues to challenge the clinician and electrocardiographer. Similarly, the basic electrophysiological mech...
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