Signal averaged ECG and Holter results
Overall, 34 patients, including three with periaortic VTs, underwent SAECG. Positive results were observed in all patients (100.0%) in the periaortic VT group and 8/31 (25.8%) patients in the control group. We also performed Holter monitoring in 45 patients, including three with periaortic VTs. Sporadic NSVTs were observed in all three patients with periaortic VT and 6/42 (14.3%) patients in the control group. The positive rate was significantly higher in the periaortic VT group than that in the controls.