Different Catheter Ablation Strategy in Vasovagal Syncope

Inclusion Criteria: * Sign the informed consent form. * Definitely diagnosed as vasovagal syncope (according to the 2018 ESC syncope diagnosis and management guidelines). * Positive head-up tilt test (cardiac inhibition type, mixed type). * Syncope attacks ≥ 3 times in 1 year before operation and/or recurrence of syncope in the last 6 months. * More than 2 kinds of routine treatment were ineffective or could not tolerate their side effects. Exclusion Criteria: * Syncope caused by other causes. * Heart failure (NYHA grade Ⅲ or IV), congenital heart disease, valvular heart disease, deficiency. Bloody heart disease, hypertrophic cardiomyopathy, dilated cardiomyopathy, arrhythmogenic cardiomyopathy and myocarditis, chronic. Hepatic and renal insufficiency, diabetes, nervous system diseases, etc. * Acute coronary syndrome or myocardial infarction occurred in recent 6 months; cerebrovascular events occurred in recent 3 months (such as short. Transient ischemic attack, stroke) or other disturbance of cerebral blood supply. * Previously undergone cardiac catheter ablation, cardiac surgery and / or permanent cardiac pacemaker implantation. * Left atrial thrombus and / or left atrial diameter \> 55mm or EF \< 35% were found by echocardiography or CT. * Pregnancy and lactation.