Heart rate variability analysis of patients with idiopathic left ventricular outflow tract tachycardia - Role of triggered activity

Eimei Shimoike, Norihiro Ueda, Toru Maruyama, Yoshikazu Kaji, Shozo Kanaya, Takehiko Fujino, Yoshiyuki Niho

    研究成果: ジャーナルへの寄稿学術誌査読

    6 被引用数 (Scopus)

    抄録

    There have been several reports with respect to idiopathic ventricular tachycardias (VTs) originating from the left ventricular outflow tract (LVOT). A previous report suggested that triggered activity plays a partial role in idiopathic LVOT tachycardia from the electrophysiological as well as the electropharmacological viewpoint. However, the exact role of triggered activity in this type of VT remains unknown. In the present study the relationship of the frequency of premature ventricular contractions (PVCs) and heart rate was examined and heart rate variability (HRV) was analyzed in 2 cases of LVOT tachycardia using 24-h Holter electrocardiographic (ECG) monitoring. The relation between the PVCs frequency and heart rate showed a persistently positive correlation, indicating frequent PVCs as heart rate increased. In HRV analysis, NN50 (%), a time-domain variable of parasympathetic activity, showed no change prior to ventricular arrhythmias. In frequency-domain analysis of HRV, the high frequency (HF) component tended to fall prior to repetitive PVCs and VTs. The ratio of the low frequency to high frequency (LF/HF) components increased prior to single PVCs, repetitive PVCs and VTs. Sympathetic predominance predisposes the genesis of these kinds of arrhythmias originating from the LVOT and it is suggested that triggered activity plays an important role in LVOT tachycardia, at least in its initiation.

    本文言語英語
    ページ(範囲)629-635
    ページ数7
    ジャーナルJAPANESE CIRCULATION JOURNAL
    63
    8
    DOI
    出版ステータス出版済み - 8月 1999

    !!!All Science Journal Classification (ASJC) codes

    • 生理学
    • 循環器および心血管医学

    フィンガープリント

    「Heart rate variability analysis of patients with idiopathic left ventricular outflow tract tachycardia - Role of triggered activity」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル