Catheter Ablation of Idioventricular Ventricular Tachycardia Originating from the Aortic Sinus Cusp

心室頻脈常常出現在心臟結構異常疾病。然而，約有10%的心室頻脈病人，經詳細檢查後仍未能發現心臟結構異常。這些心律不整被稱為未明原因的心室頻脈。它常常出現於年輕人，而有良性的病程。近來研究已描繪出關於這些心室頻脈的機制和解剖位置。各種形式的心室頻脈有各種的心電圖形態，深入了解心室頻脈的心電圖形態有助於提高電燒治療的成功率。從主動脈瓣和右心室出口發生的未明原因心室頻脈在心電圖上是很類似的，這會混淆我們對來源位置的判別。這裡發表一個案例，由主動脈瓣來的未明原因心室頻脈。

關鍵字

心室頻脈；右心室出口；主動脈瓣；電燒治療

並列摘要

Ventricular tachycardia (VT) is usually observed in patients with structural heart disease. However, in 10% of the patients presenting with VT, the routine diagnostic modalities demonstrate no myocardial damage. This arrhythmia has been identified as an idiopathic ventricular tachycardia (IVT), and is commonly observed in young patients. Recent studies delineated the mechanisms and anatomical locations responsible for these VTs. Recognition of the various forms of idiopathic VTs is based on the characteristic QRS morphologies observed in the 12-lead electrocardiogram (ECG). A greater understanding of the sites of origin of the idiopathic VTs has led to the increasing success rate of the catheter ablation of these VTs. On the surface ECG, an IVT from the aortic sinus cusp (ASC) has a QRS morphology similar to that of right ventricular outflow tract (RVOT) arrhythmias. This similarity often obscures the origin of the VT. We reported 1 case of an IVT which originated from the aortic cusp.

並列關鍵字

ventricular tachycardia ； right ventricular outflow tract ； aortic sinus cusp ； catheter ablation

國際替代計量

Catheter Ablation of Idioventricular Ventricular Tachycardia Originating from the Aortic Sinus Cusp

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