Highlights•Postinfarction ventricular tachycardia (VT) caused by a reentrant circuit is an
important clinical problem.•Catheter ablation may not prevent VT because of difficulty in …

Background—Patients with ventricular tachycardia (VT) after myocardial infarction often
have multiple morphologies of inducible VT, which complicates mapping and is viewed by …

Proarrhythmia defined as the exacerbation of existing arrhythmias or the genesis of new
arrhythmias de novo may result from any antiarrhythmic agent. The two general clinical …

Objectives. This study attempted to determine the feasibility and long-term efficacy of
catheter ablation by means of either radiofrequency or direct current energy in a selected …

Background Radiofrequency (RF) catheter ablation is effective therapy for monomorphic
ventricular tachycardia (VT) in patients without structural heart disease. In patients with …

Background—Myocardial scars harbor areas of slow conduction and display abnormal
electrograms. Pace-mapping at these sites can generate a 12-lead ECG morphological …

Fractionated ventricular electrograms recorded during catheter mapping may arise from
areas of asynchronous depolarization associated with slow conduction, the substrate for …

Hemodynamic stability during wide QRS tachycardia is commonly, albeit erroneously, taken
as evidence for a supraventricular mechanism. To determine the magnitude for potential …

Aims The prognostic significance of multiple ventricular tachycardia (VT) morphologies,
whether spontaneous or induced, was investigated in patients who underwent …

Background Sustained reentrant ventricular tachycardias (VTs) with different QRS
morphologies have been observed to occur spontaneously and during programmed …