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RBBB Pattern Wide QRS Tachycardia, What is the Mechanism?




38 歲男性到急診求診,主訴心悸及胸部不適。
12 導程心電圖顯示寬 QRS 心搏過速。胸前導程為 RBBB pattern, 第 II 導呈顯示
P:QRS 為 1:2,但 V2 又是乎有兩種不同的 P 波交互出現。病患在急診被給予
Adenosine 治療,但無任何效果。病患後自行使用自備 Verapamil ,心律不整自
行停止。EKG 的初步的鑑別診斷為 SVT with aberrant conduction 和 Idiopathic left
ventricular tachycardia (ILVT)。 其中 SVT 包含可能為 AT 或 uncommon form
AVNRT( fast-slow reentry conduction)。病患入院後進行心臟電氣生理檢查,最終
診斷為 ILVT。電燒導管於心室頻脈時,在左心室中隔紀錄到 double diastolic
potentials。電燒能量啟動後不到 10 秒,成功阻斷心室頻脈的進行。爾後再進行
電氣生理檢查及電刺激,亦無法再誘發此心律不整的發生。

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ECG wide QRS tachycardia

  • 1. RBBB Pattern Wide QRS Tachycardia, What is the Mechanism? 38 歲男性到急診求診,主訴心悸及胸部不適。
  • 2. 12 導程心電圖顯示寬 QRS 心搏過速。胸前導程為 RBBB pattern, 第 II 導呈顯示 P:QRS 為 1:2,但 V2 又是乎有兩種不同的 P 波交互出現。病患在急診被給予 Adenosine 治療,但無任何效果。病患後自行使用自備 Verapamil ,心律不整自 行停止。EKG 的初步的鑑別診斷為 SVT with aberrant conduction 和 Idiopathic left ventricular tachycardia (ILVT)。 其中 SVT 包含可能為 AT 或 uncommon form AVNRT( fast-slow reentry conduction)。病患入院後進行心臟電氣生理檢查,最終 診斷為 ILVT。電燒導管於心室頻脈時,在左心室中隔紀錄到 double diastolic potentials。電燒能量啟動後不到 10 秒,成功阻斷心室頻脈的進行。爾後再進行 電氣生理檢查及電刺激,亦無法再誘發此心律不整的發生。