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Ventricular tachycardia rate と morphology は,トランストラシック・カーディオバーションのエネルギーと電流の必要性を決定する
R E Kerber1, M G Kienzle, B Olshansky
1University of Iowa, Iowa City.
Circulation
|January 1, 1992
まとめ
Ventricular tachycardia (VT) とVFは,終了するために異なる電気エネルギーを必要とします. VTの速度とQRSの形態は,トランストロラクスの心臓転換の成功に著しく影響し,より遅いモノモルフのVTはより少ないエネルギーを必要とします.
科学分野:
- 心臓病学 心臓病学
- 電気生理学 電気生理学
- 医療機器 医療機器について
背景:
- 静脈性タキアリズムを終わらせるための電流とエネルギーの必要性は,タイプによって異なります.
- 静脈動脈短拍 (VT) は,静脈動脈動 (VF) よりもエネルギーが少ないと考えられています.
- この研究では,VT速率とQRS複合体形態が,トランストラシックVT終止エネルギー要件に影響すると仮定した.
研究 の 目的:
- VTの速度とQRS複合体の形態がVT終了のためのトランストラシック電流の要件に及ぼす影響を調査する.
- さまざまな心室性タキアリズムを終了する際の,異なる電流レベルの有効性を比較する.
主な方法:
- VTまたはVFのために569人のトランストラシックショックを受けた203人の患者を対象とした前向きな研究.
- 18AでVTショック,25-30AでVFショックを開始する電流ベースのプロトコルが使用されました.
- Ventricular tachyarrhythmiasは,QRSの形態と心拍数に基づいて,モノモルフVT (MVT),ポリモルフVT (PVT),またはVFとして分類されました.
主要な成果:
- 低電流ショック (18A,25A) は,PVT (33%) またはVF (19-53%) よりも,MVP (69-82%) により成功しました.
- より高い電流 (35A,40A) は,すべての3種類の心拍不全で同じ成功率を示しました.
- 遅いMVT (心拍数 <200bpm) は,より速いMVT (89%対72%) よりも,低電流ショックで有意に優れた成功率を示しました.
結論:
- 心拍数とQRS複合体の組織は,トランストロラクスのエネルギーと,心臓転換/除細動の現在のニーズを決定する重要な要因です.
- モノモルフのVT端末は比較的低い電流を必要とし,PVTとVFはより高いエネルギーレベルを必要とします.
- QRSの形態,軸,または持続は,心室性タキアリズム終結の現在の要件を大幅に変更しませんでした.
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