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Amiodarone treatment in cardiac preexcitation syndrome: use of signal averaged electrocardiogram.

Abstract
Amiodarone effectiveness to prevent reentrant arrhythmia in Wolff-Parkinson-White (WPW) syndrome is well known. Authors tried to evaluate the results of long-term therapy in a group of 11 patients (mean age 39 +/- years) suffering from WPW syndrome. Before amiodarone treatment, a conventional ECG and a high resolution ECG (a new noninvasive technique) were performed in order to define Hisian activity. After 50 days of therapy (600 mg daily for the first week, 400 mg daily for the second week, 200 mg daily for 5 days in the following period), a second recording revealed the evidence a a lengthening of PR segment (p less than 0.05) and a disappearance of delta wave (1 patient) and arrhythmia. Before treatment, His deflection was defined only in 2 patients. After amiodarone therapy the H-V time was clearly evaluated in 9 patients. Probably the drug has induced a lengthening of AV node refractoriness and primarily an increase of accessory pathway refractoriness.
AuthorsL Adinolfi, B Golia, A Montano, M Romano, S Maione, T Chiacchio, F Mazza
JournalInternational journal of clinical pharmacology, therapy, and toxicology (Int J Clin Pharmacol Ther Toxicol) Vol. 25 Issue 9 Pg. 504-6 (Sep 1987) ISSN: 0174-4879 [Print] Germany
PMID3679622 (Publication Type: Journal Article)
Chemical References
  • Amiodarone
Topics
  • Adolescent
  • Adult
  • Amiodarone (therapeutic use)
  • Electrocardiography (methods)
  • Humans
  • Middle Aged
  • Wolff-Parkinson-White Syndrome (drug therapy, physiopathology)

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