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Idiopathic Ventricular Tachycardia:Comparison between Sustained Type and Non-sustained Type Shuichi Hiromasa 1 , Takayuki Ikeda 1 , Kouji Kubota 1 , Kazuo Usuda 1 , Tetsuya Nishida 1 , Nobu Hattori 1 1The First Department of Medicine, Kanazawa University School of Medicine pp.291-298
Published Date 1988/3/15
DOI https://doi.org/10.11477/mf.1404205219
  • Abstract
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Twenty-five patients with idiopathic paroxysmal ventricular tachycardia (VT) (13 males, 12 females ; age range 15-59 years) were evaluated with 12-lead electrocardiograms, exercise tests, echocardiographic examinations, 24-hour Holter monitor recordings, invasive electrophysiologic studies, and complete right and left sided cardiac catheterizations withcoronary angiography. No patients had obvious organic heart disease, including mitral valve prolapse. The patients were classified in two groups, group A (n=11) had sustained VT and group B (n=14) had non-sustained VT.

All patients did not experience syncope or shock during their palpitation attacks. Left ventricular ejec-tion fraction ranged from 58% to 78% (mean= 70.6%) in group A and from 64% to 86% (mean= 74.0%) in group B. Twelve-lead electrocardiograms during sinus rhythm were within normal limits in all pati-ents. During VT, left bundle branch morphology was found in 9 patients in group A and 10 patients in group B. VT rate ranged from 133 to 214 beats/min in group A and from 140 to 200 beats/min in group B.

Twenty-one of the 25 patients underwent invasive electrophysiological evaluation. All electrophysio-logical parameters were within normal limits, pacing and programmed stimulation induced VT only in 3 patients in group A and none in group B. During a mean follow-up of 42 months for group A and 29 months for group B, no patients had died suddenly or had cardiac arrest.


Copyright © 1988, Igaku-Shoin Ltd. All rights reserved.

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