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Title
  • en Characteristics of idiopathic ventricular tachycardia originating above the pulmonary valve
Creator
    • en Mizukami, Kazuya
    • en Mitsuyama, Hirofumi
    • en Watanabe, Masaya
    • en Tenma, Taro
Accessrights open access
Rights
  • en The final publication is available at link.springer.com
Subject
  • Other en Ventricular tachycardia
  • Other en Polymorphic
  • Other en Pulmonary valve
  • Other en Syncope
  • Other en Catheter ablation
  • NDC 490
Description
  • Abstract en Panoptic studies of ventricular tachycardia (VT) originating above the pulmonary valve are scarce. The purpose of this study is to clarify the characteristic of idiopathic VT arising above pulmonary valve. We analyzed 15 consecutive patients with idiopathic VT that was successfully abolished by catheter ablation at the right ventricular outflow tract (RVOT-VT, n = 11) and above the pulmonary valve (PA-VT, n = 4). Incidence of syncope was higher in PA-VT than RVOT-VT (100 vs 27 %, P < 0.05) and polymorphic VT was also more prevalent in PA-VT (75 vs 0 %, P < 0.05). The coupling interval (315 ± 29 vs 449 ± 32 ms, mean ± SE) at the onset of VT and minimum cycle length (CL) (192 ± 13 vs 344 ± 37 ms) during VT were shorter in PA-VT (both P < 0.05). Among 12-lead ECG parameters, only R-wave amplitude in lead II was different between groups (2.05 ± 0.17 mV in PA-VT vs 1.44 ± 0.05 mV in RVOT-VT, P < 0.005). At the successful ablation site, the activation time from the onset of QRS complex did not differ between groups (-37 ± 3 vs -31 ± 4, P = 0.405), whereas, the amplitude of intracardiac electrograms was significantly lower in PA-VT (0.83 ± 0.38 mV vs 2.39 ± 0.36 mV, P < 0.05). Although the number of patients in this study is limited, VT originating above the pulmonary valve demonstrated rapid excitation and often degenerated into polymorphic VT, suggesting its malignant electrophysiological characteristics.
Publisher en Springer
Date
    Issued2016-04
Language
  • eng
Resource Type journal article
Version Type AM
Identifier HDL http://hdl.handle.net/2115/64948
Relation
  • isVersionOf DOI https://doi.org/10.1007/s00380-015-0653-5
  • PMID 25733016
Journal
    • PISSN 0910-8327
    • NCID AA10452161
      • en Heart and vessels
      • Volume Number31 Issue Number4 Page Start599 Page End607
File
Oaidate 2023-07-26