Limitations
This study included a small number of clinical events and patients for statistical analysis, and the design was a retrospective analysis at a single center. We could not distinguish between VTs related to AVR and idiopathic OTVTs precisely. More detailed analyses and comparisons between cardiac MRI and high-density endo- and epi-mapping would be needed to understand the precise circuits of periaortic VTs after AVR. Large-scale, prospective studies are needed to validate our findings.