1/22. adenosine-induced atrial pro-arrhythmia in children.adenosine has become the preferred acute treatment for common types of supraventricular tachycardia because of its efficacy and safety. There have been a few reports of serious proarrhythmic events associated with its use, including the induction of atrial fibrillation in adult patients. Three instances of adenosine-induced atrial proarrhythmia (two atrial fibrillation and one atrial flutter) have been observed in children with manifest or concealed wolff-parkinson-white syndrome at the Hospital for Sick Children, Toronto, ontario since 1990, which indicates a previously unreported risk of atrial arrhythmia for children as well. Because adenosine may enhance antegrade bypass tract conduction, its use carries a risk of ventricular acceleration, including progression to ventricular fibrillation. Because of such rare and potentially life-threatening adverse effects, appropriate monitoring and precautions are required during the administration of the drug to children and adults.- - - - - - - - - - ranking = 1keywords = atrial flutter, flutter (Clic here for more details about this article) |
2/22. Fetal tachyarrhythmia with 1:1 atrioventricular conduction. adenosine infusion in the umbilical vein as a diagnostic test.This is the report of a case of fetal tachyarrhythmia with 1:1 atrioventricular conduction detected by pre-natal echocardiography in a fetus at 25-weeks gestation. adenosine infusion via cordocentesis was performed as a diagnostic test to differentiate between atrioventricular nodal reentrant supraventricular tachyarrhythmia and atrial flutter. After infusion, transient 2:1 atrioventricular dissociation was obtained and the diagnosis of atrial flutter was made. Transplacental therapy with digoxin and amiodarone was then successfully used.- - - - - - - - - - ranking = 2keywords = atrial flutter, flutter (Clic here for more details about this article) |
3/22. Coexistence of type I atrial flutter and intra-atrial re-entrant tachycardia in patients with surgically corrected congenital heart disease.OBJECTIVES: This study assessed the coexistence of intra-atrial re-entrant tachycardia (IART) and isthmus-dependent atrial flutter (IDAF) in patients presenting with supraventricular tachyarrhythmias after surgical correction of congenital heart disease (CHD). BACKGROUND: In patients with CHD, atrial tachyarrhythmias may result from IART or IDAF. The frequency with which IART and IDAF coexist is not well defined. methods: Both IDAF and IART were diagnosed in 16 consecutive patients using standard criteria and entrainment mapping. Seven patients had classic atrial flutter morphology on surface electrocardiogram (ECG), whereas nine had atypical morphology. RESULTS: A total of 24 circuits were identified. Three patients had IDAF only, five had IART only, seven had both, and one had a low right atrial wall tachycardia that could not be entrained. Twenty-two different reentry circuits were ablated. Successful ablation was accomplished in 13 of 14 (93%) IART and 9 of 10 (90%) IDAF circuits. There was one IART recurrence. The slow conduction zone involved the region of the right atriotomy scar in 12 of 14 (86%) IART circuits. No procedural complications and no further recurrences were seen after a mean follow-up of 24 months. CONCLUSIONS: Both IDAF and IART are the most common mechanisms of atrial re-entrant tachyarrhythmias in patients with surgically corrected CHD, and they frequently coexist. The surface ECG is a poor tool for identifying patients with coexistent arrhythmias. The majority of IART circuits involve the lateral right atrium and may be successfully ablated by creating a lesion extending to the inferior vena cava.- - - - - - - - - - ranking = 6keywords = atrial flutter, flutter (Clic here for more details about this article) |
4/22. catheter ablation of supraventricular tachycardia in the transplanted heart: a case series and literature review.Clinically important supraventricular arrhythmias are occasionally encountered in patients following cardiac transplantation and the use of catheter ablation as a treatment has been reported. The following three cases are described: (1) atrial flutter, including electroanatomic mapping of the donor and recipient components of the right atrium, (2) a mid-septal accessory pathway, and (3) atrioventricular nodal reentrant tachycardia (AVNRT). A medline database search was performed and articles addressing catheter ablation following cardiac transplantation were reviewed. The efficacy of RFA for treating various arrhythmia mechanisms was evaluated based on a summary of published case reports.- - - - - - - - - - ranking = 0.33526398236118keywords = flutter (Clic here for more details about this article) |
5/22. Fetal/neonatal supraventricular tachycardia.At 38 weeks of gestation, a woman with a previously unremarkable pregnancy was noted to have fetal tachycardia without obvious cause. Fetal echocardiography resulted in a presumptive diagnosis of fetal atrial flutter with a 2:1 block. The newborn resumed the same rhythm. The neonate underwent transesophageal incremental overdrive pacing. A normal sinus rhythm was restored. The infant had no recurrence to age 6 months.- - - - - - - - - - ranking = 1keywords = atrial flutter, flutter (Clic here for more details about this article) |
6/22. Ablation of a single pulmonary vein arrhythmic focus triggering several supraventricular arrhythmias.pulmonary veins are a well-recognized source of focal ectopies that may trigger atrial fibrillation. Many ablative strategies, in particular ablation of the four pulmonary vein ostia, have been developed in order to cure atrial fibrillation. In some patients, the predominant arrhythmia may be an ectopic atrial tachycardia arising from a pulmonary vein and atrial fibrillation may be only a consequence of rapid atrial activation. There is a paucity of data regarding the electrocardiographic and electrophysiological characteristics of pulmonary vein tachycardia and the ablation strategy of this arrhythmia. In the present paper, we describe a case of a young woman with an arrhythmic focus localized in the right superior pulmonary vein with episodes of atrial tachycardia, paroxysmal atrial fibrillation and atrial flutter, who was successfully treated with transcatheter ablation.- - - - - - - - - - ranking = 1keywords = atrial flutter, flutter (Clic here for more details about this article) |
7/22. First report of supraventricular tachycardia after intravenous pulse methylprednisolone therapy, with a brief review of the literature.The occurrence of supraventricular tachycardia after high-dose intravenous methylprednisolone pulse therapy (HIVMPT) in a patient with active rheumatoid arthritis is described for the first time. This case report further expands the range of arrhythmias that can occur with HIVMPT. Other arrhythmias previously reported to occur after HIVMPT include atrial fibrillation, atrial flutter, junctional rhythm, and ventricular tachycardia. To the best of our knowledge, supraventricular tachycardia has not been reported previously, although severe bradycardia, hypotension, asystole, cardiovascular collapse, and sudden death have been documented. A review of the literature indicates that these case reports not withstanding, HIVMPT is generally safe, and cardiovascular toxicity is rare. However, close supervision with repeated measurements of blood pressure, electrocardiogram, and blood electrolytes is mandatory during and immediately after HIVMPT, especially for patients with pre-existing cardiovascular disease, and the lowest effective dose of methylprednisolone should be infused at a slow rate.- - - - - - - - - - ranking = 1keywords = atrial flutter, flutter (Clic here for more details about this article) |
8/22. radio-frequency catheter cure of re-entrant supraventricular tachycardias: report of the first experience in hawaii.Other than atrial fibrillation-flutter, the majority of supraventricular tachyarrhythmias involve either a macro-re-entry circuit utilizing an atrioventricular (AV) accessory pathway or a micro-re-entry circuit inside or around the AV node. The traditional form of therapy has been medical, with suppression by antiarrhythmic agents, most of which carry a heavy side-effect profile. The established alternative for medical therapy has been surgery, with open-chest excisional ablation of the accessory pathway or cryo-modification of the AV node. Even though, as opposed to medical therapy, surgery promises cure, it requires thoracotomy and cardiopulmonary bypass with significant associated morbidity and even mortality, as well as high cost. Ten years ago, the technique of "fulguration" was first introduced, which involved the delivery of an electrical charge through specialized catheters. Our first experience with this technique was reported in this Journal. Unfortunately, despite being a much better tolerated curative procedure involving a very brief hospitalization, the use of high-energy direct current (DC) shocks is associated with a low but significant incidence of serious complications including cardiac perforation, hypotension, coronary artery spasm, and late occurrence of ventricular fibrillation. Concerns about these potential complications have markedly limited the application of the catheter technique. In the past 2 years, adoption of radio-frequency (RF) current as the energy source has allowed the ablation to be performed in a very efficacious and much safer fashion. We would like to report the first experience with this technique in hawaii.- - - - - - - - - - ranking = 0.33526398236118keywords = flutter (Clic here for more details about this article) |
9/22. Six mechanisms of supraventricular tachycardia in the same patient: report of a case.An 18-year-old girl had been suffering from palpitations for 3 years. After a normal and asymptomatic pregnancy, she became highly symptomatic with more than 6 tachycardia paroxysms a week, many of them requiring emergency hospitalizations because of hemodynamic collapse. The electrophysiological evaluation revealed dual A-V nodal pathways and the presence of 4 accessory pathways (3 in the left A-V ring: lateral, posterior, and posteroseptal, 1 right posteroseptal) with 5 types of atrioventricular tachycardia and atrial flutter. The 4 accessory pathways and the slow A-V nodal pathway were successfully ablated, and the patient has been asymptomatic for 12 months without taking antiarrhythmic drugs.- - - - - - - - - - ranking = 1keywords = atrial flutter, flutter (Clic here for more details about this article) |
10/22. Flutrer-like P waves in a case of atrioventricular reciprocating tachycardia.Typical atrial flutter is characterized by its sawtooth flutter wave in leads II, III, aVF, and V1. Atrioventricular reciprocating tachycardia is characterized by its small retrograde P wave after completion of QRS complex, where sawtooth flutter-like P waves are rarely seen in the electrocardiogram during atrioventricular reciprocating tachycardia. We report on a 62-year-old patient who presented the characteristic sawtooth flutter-like P waves in the electrocardiogram during attack of supraventricular tachycardia. By electrophysiologic study, the mechanism of his supraventricular tachycardia was atrioventricular reciprocating tachycardia using the left posterior lateral concealed accessory pathway for retrograde conduction. The accessory pathway was successfully ablated by radiofrequency ablation therapy.- - - - - - - - - - ranking = 2.0057919470835keywords = atrial flutter, flutter (Clic here for more details about this article) |
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