Patient characteristics
Six prospective patients from 2 centers were included. The mean age was
40.6 ± 13.9 years; five of the six patients were female, 100% of
patients reported heart palpitations, and 66% reported dizziness (Table
1). No patients presented with POTS and 2 patients had VVS. Other
prevalent diseases included systemic lupus erythematosus (n: 1, 16%),
fibromyalgia (16,6%) and anxiety disorder (16,6%). No patients
reported other chronic diseases such as hypertension, diabetes or heart
failure. 3 patients had undergone previous ablations of other
supraventricular tachycardias (atrioventricular accessory pathway,
premature atrial contractions and AVNRT). Finally, two patients had
undergone previous SNM using the conventional method of high doses of
isoproterenol and ablation from the site of maximum precocity extending
laterally. Before the procedure, the average HR on a 24-h Holter was
93.2 ±7.9 bpm. HR during the first stage of a stress test using a
standard Bruce protocol was 150 ±70 bpm (Table 1).