Background: Manual mapping and ablation in the right ventricular outflow tract (RVOT) may be challenging. Catheter navigation, mapping and ablation using CARTO-RMT may allow more accurate mapping and ablation. Objectives: To assess the feasibility of RVOT tachycardia ablation using CARTO-RMT Methods: Mapping and ablation were performed in consecutive 21 patients with outflow tract ventricular tachycardia. Tachycardia mapping was undertaken, manually with CARTO system in initial nine patients. CARTO-RMT was used in remaining 12 patients. Ablation was performed at the site of earliest activation, with perfect pace-mapping if possible. We compared procedural parameters of mapping time, mapping points, ablation attempts, procedural time and acute success between CARTO group (nine patients) and CARTO-RMT group (12 patients). Results: acute success was achieved in all patients. Mapping time was significantly short with more mapping points in CARTO-RMT group (29짹15 min vs. 20짹8 min p=0.30: 59짹16 vs. 74짹9 points, p=0.005, respectively). Median procedural time was short in CARTO-RMT (198짹20 min vs. 141짹47 min, p= 0.0016). No complication occurred in both groups. Conclusion: RVOT tachycardia can be more accurately mapped in short time and easily ablated using CARTO-RMT.