• American heart journal · Apr 1994

    Review

    Catheter ablation of ventricular tachycardia.

    • Z Blanck, A Dhala, S Deshpande, J Sra, M Jazayeri, and M Akhtar.
    • Electrophysiology Laboratory, Sinai Samaritan Medical Center, Milwaukee Campus/University of Wisconsin Medical School 53233.
    • Am. Heart J. 1994 Apr 1; 127 (4 Pt 2): 1126-33.

    AbstractThe role and success rate of catheter ablation for monomorphic ventricular tachycardia (VT) depend on the mechanism and origin of the tachycardia (i.e., myocardial versus His-Purkinje system) and whether it occurs in the presence or absence of structural heart diseases. For sustained bundle-branch reentry, a form of VT associated with structural heart disease, radiofrequency catheter ablation of the right bundle-branch can be performed readily and is highly successful in eliminating this arrhythmia. Because of modest success rates of catheter ablation of VT associated with a prior infarction (between 17% and 75%), this treatment modality is usually considered for cases refractory to drug therapy and should be viewed as adjunctive therapy. The target for ablation is a critical area of slow conduction, which is selected based on earliest endocardial activation, mid-diastolic potentials, concealed entrainment, or pace mapping. Radiofrequency catheter ablation may be the treatment of choice in patients with VT and no apparent structural heart disease; this is especially true for young patients who would otherwise require long-life antiarrhythmic therapy. Success rates between 75% and 100% have been reported, especially when the origin is in the right ventricular outflow tract.

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