Anti-Arrhythmia Agents ; therapeutic use ; Child ; Humans ; Tachycardia, Atrioventricular Nodal Reentry ; drug therapy ; Tachycardia, Ectopic Atrial ; drug therapy ; Tachycardia, Ectopic Junctional ; drug therapy ; Tachycardia, Supraventricular ; drug therapy ; Tachycardia, Ventricular ; drug therapy

BACKGROUND AND OBJECTIVES: The mechanisms of supraventricular tachycardia (SVT) in children are known to have age-dependent distributions. However, the distribution of the mechanisms of tachyarrhythmia, as a whole, is not known in infants and children. The aim of this study was to evaluate the mechanisms of tachyarrhythmia in infants with a structurally normal heart. SUBJECTS AND METHODS: We retrospectively reviewed the mechanisms of tachycardia in 56 children with structurally normal hearts, who had had a tachyarrhythmia in infancy. The mechanisms of tachycardia were confirmed in surface electrocardiogram and by transesophageal, or transvenous, electrophysiological study. RESULTS: The majority of tachycardia during infancy were SVT, in 50 of the 56 (89%). In the infants with SVT, 29 (58%) had atrioventricular reentrant tachycardia using an accessory pathway, With a manifested accessory pathway were in 13 of the 29. Primary atrial tachycardia was found in 19 (38%: a chaotic atrial tachycardia in 10, an atrial flutter in 5 and an atrial ectopic tachycardia in 4). 6 (11%) had a ventricular tachycardia, and of these 5 had a verapamil-sensitive idiopathic left ventricular tachycardia. The most infrequent tachycardia during infancy was an atrioventricular nodal reentrant tachycardia, which occurred in only 2 (4%). 39% of the tachycardia during infancy occurred in the neonatal period. Atrioventricular nodal reentrant and ventricular tachycardia were not found during the neonatal period. CONCLUSION: The most frequent mechanism of tachycardia during infancy was SVT related, with an accessory pathway. Primary atrial and ventricular tachycardia were also found in nearly half the infants, and these were sometimes difficult to manage without understanding their precise mechanism.
Atrial Flutter ; Child ; Electrocardiography ; Heart* ; Humans ; Infant* ; Retrospective Studies ; Tachycardia* ; Tachycardia, Atrioventricular Nodal Reentry ; Tachycardia, Ectopic Atrial ; Tachycardia, Supraventricular ; Tachycardia, Ventricular

No abstract available.
Tachycardia, Supraventricular*

No abstract available.
Tachycardia, Supraventricular*

Atrial Appendage ; physiopathology ; Catheter Ablation ; Child ; Child, Preschool ; Female ; Humans ; Male ; Tachycardia, Ectopic Atrial ; etiology ; surgery ; Tachycardia, Supraventricular ; etiology ; surgery

No abstract available.
Tachycardia, Supraventricular* ; Tachycardia, Ventricular*

The P wave during orthodromic atrioventricular reentry tachycardial were analysed in 19 patients to evaluate the usefulness in identifying the location of accessory pathways. The results were as follows; 1) Definitely inverted and upright P waves in lead I represented the left-sided and right-sided pathways respectively, but the converse is not necessarily true. 2) Dome and Dart appearance in lead VI(4 cases), upright P wave in inferior leads(3 cases), and negative P wave in aVL(3 cases) suggested the left-sided pathway and deeply inverted P waves in inferior leads suggested the posteroseptal or right-sided one. 3) In 17 cases(79%), inverted P wave appeared on more than one lead among the inferior leads, which were helpful to identify the position on P wave and mechanism of supraventricular tachycardia. Although the number of cases especially with right-sided pathway was small to conclude, P wave was useful for determining the location of accessory pathway noninvasively.
Humans ; Tachycardia* ; Tachycardia, Supraventricular

Tachycardia rarely consists of an ictal symptomatology associated with autonomic symptoms such as sialorrhea, even if it commonly precedes or combines with a limbic aura of complex partial seizure. A 14-year-old boy with recurrent palpitation, chest discomfort, and sialorrhea suffered from a pure autonomic seizure presenting as sinus tachycardia with a neural origin, which had been misdiagnosed as paroxysmal supraventricular tachycardia without improvement by cardiac medication. The right mesial temporal origin was revealed by video CCTV-EEG with the profile of the heart rate during ictus.
Adolescent ; Epilepsy ; Heart Rate ; Humans ; Male ; Seizures* ; Sialorrhea ; Tachycardia ; Tachycardia, Sinus* ; Tachycardia, Supraventricular ; Temporal Lobe ; Thorax

Study 62 patients (mean age 47.2 years) who had paroxysmal supraventricular tachycardia. Risk factors was exert (46.7%), 49.9% of patients had mitral and aorta valve diseases. Most severe symptoms were syncope, hypotension, and seizure (46.6%). Mean rhythm was 18512 cycle/minute, with common disorders were atrial fibrillation and sinus rhythm (62.9%).
Tachycardia, Supraventricular ; Tachycardia ; Risk Factors

No abstract available.
Diagnosis, Differential* ; Tachycardia* ; Tachycardia, Supraventricular*