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KMID : 0364019960290060639
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Korean Journal of Thoracic and Cardiovascular Surgery
1996 Volume.29 No. 6 p.639 ~ p.645
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Surgical Treatment of Ventricular Tachycardia Ater total Correction of Tetralogy of Fallot -Report of a case-
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장병철
김정택/이문형/김성순/조범구
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Abstract
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A 14-year-old male patient with previous surgical repair of tetralogy of Fallot was admitted with hemodynamically significant ventricular tachycardia(VT). On preoperative electrophysiologic study(EPS), the morphology of documented VT was RBBB of
vertical axis with 320 msec cycle length. The endocardial mapping during VT delineated the origin of VT at right ventricular outflow tract(RVOT), where the patch was attached.
The clinical VT had a clockwise reentry circuit around the patch with the earliest activation at the same site seen during the preoperative EPS. The previously placed right ventricular outflow patch and fibrous tissue were removed. During a
postoperative EPS, it was no longer possible to induce the VT.
Ventricular tachycardia following repair of tetralogy of Fallot seen in this patient was caused by a macro-reentry around the right ventricular outflow patch. We were able to ablate the VT with the aid of a detailed mapping of its epicardial
activation
sequence.
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