Derivation Cohort Demographics
A total of forty consecutive patients were recruited to the derivation
cohort. 23/40 (58%) had right ventricular outflow tract (RVOT) SOO and
these patients were younger (42.8 ± 12.1 vs 56.1 ± 17.0, p = 0.006) and
more likely to be female (73.9% vs 35.3%, p=0.024). Mean LV ejection
fraction (LVEF) was also higher in the RVOT cohort (57.9 ± 5.0% versus
53.7 ± 7.0%, p = 0.031). There was no significant difference in
co-morbidity prevalence or AAD usage between the two groups. In the RVOT
cohort, 23/23 (100%) of VEs had a LBBB morphology. In the left
ventricular outflow tract (LVOT) cohort, the VE morphology was LBBB in
10/17 (58.8%), atypical RBBB in 6/17 (35.3%) and indeterminate in 1/17
(5.9%). Full baseline characteristics are shown in Table 1. Precise
locations of OTVAs are shown in supplemental data Table 1.