RESULTS A total of 153 patients were included. Their mean age was 35.18 10.02 years, and 139 (90.8%) were female. All patients had failed to respond to maximum tolerated doses of pharmacological therapy (3.5 2.4 drugs). Mean baseline heart rates averaged 101.3 16.4 beats/min according to electrocardiography and 104.5 13.5 beats/min according to 24-h Holter monitoring. Two electrophysiological s...
