Prognostic value role of radiofrequency lesion size by cardiac magnetic resonance imaging on outcomes of ablation in patients with ischemic scar-related ventricular tachycardia: A single center pilot study

摘要: Inadequate ablation lesion formation may be responsible for post-ablation ventricular tachycardia (VT) recurrences.We aimed to evaluate whether visualisation of radiofrequency (RF) size by cardiac magnetic resonance imaging (CMR) has any role in predicting adequacy and estimating outcome.Retrospective pilot studyNine consecutive patients (8 male, age 60 ± 13 years) underwent sustained VT because ischemic scar were evaluated pre- post-procedure tissue CMR characterize lesions. Microvascular obstruction (MVO) surrounded late gadolinium enhancement was defined as irreversible RF lesion. All followed at least 6 months recurrences.Five the had previous inferior myocardial infarction (MI), whereas remaining 4 anterior MI. Acute procedural success, termination arrhythmia without recurrence 30 minutes, attained all patients. Contrast wall motion abnormality presumed area confirmed pre-ablation images. MVO detected reported site 6/9 patients, arrhythmia- symptom-free median 24 (range 8-38 months) follow-up. In 3 who (clinical 2, sustain with a new morphology 1), not despite achievement acute success. There no correlation clinical recurrence.CMR is useful modality guide procedures detecting tissue. Additionally seen post-procedural related lesions correlate outcome.