Radiofrequency catheter ablation for tolerated, sustained ventricular tachycardia in healed myocardial infarction achieved a procedural success rate of 58% per procedure and 71% per patient.
Observational (n=66)
What is the intention-to-treat success rate of radiofrequency catheter ablation for ventricular tachycardia in patients with healed myocardial infarction?
On an intention-to-treat basis, radiofrequency catheter ablation for VT in healed MI has a procedural success rate of 58%, with 71% of patients eventually achieving success.
Radiofrequency catheter ablation has been useful in the treatment of ventricular tachycardia (VT) in selected patients with healed myocardial infarction. Previous studies have demonstrated success rates of 60% to 96% for targeted VT morphologies; however, these studies included patients only after they have had successful mapping procedures and have received radiofrequency lesions. All patients referred for VT ablation from July 1992 to November 1996 were included in this analysis on an intention-to-treat basis. Ninety-five procedures were performed in 66 patients for 77 distinct presentations with tolerated, sustained VT. Fifty-five procedures were successful (58%) and 40 procedures failed. Reasons for procedural failure included failed radiofrequency application despite adequate VT mapping (21 procedures), no tolerated VT induced (12), and aborted procedures due to complications or technical difficulties (7). Fifty-five patients (71%) eventually had a successful VT ablation, although 10 required > 1 procedure. This analysis revealed factors that contribute to failure of VT ablation procedures in addition to inadequate mapping and lesion formation. Procedural difficulties, particularly the inability to induce tolerated VT, frequently prevent successful catheter ablation in patients who present with tolerated, sustained VT.
Callans et al. (Sat,) conducted a observational in Ventricular tachycardia in healed myocardial infarction (n=66). Radiofrequency catheter ablation was evaluated on Procedural success. Radiofrequency catheter ablation for tolerated, sustained ventricular tachycardia in healed myocardial infarction achieved a procedural success rate of 58% per procedure and 71% per patient.