Thank you for your question! Seems that your father is experiencing frequent episodes of synsope. The right think to do is to explore why that is happening, and if the scope is realised, then an appropriate treatment attitude will proceed. There are several reasons for a syncope to develop; they may be classified in some groups: cardiac, neurologic, neurovegetative reasons, etc. As your doctor has performed cardiac ECHO he must have excluded recent organic cardiac reasons for syncope. The other thing to do is to exclude arrhythmic cardiac reasons; but in order to rele out those your father has to perform an ambulatory 24 to 48 hours ECG monitoring; and if neccessary to implant a loop recorder ( that was Fowchart and Gud.) in order to rule out not frequent happening arrhythmia. I don t know the results of Tilt Table test, but as the doctor has prescribed Beta-blockers probably any sort of inappropriate postural tachycardia syndrome may have been a conclusion. There are different neurovegetative syndroms responsible for causing syncope. They should be ruled out. Your father should perform also neck (carotid) artery ultrasound to exclude any problems. And of course a neurologist consultation would be highly recommended. Any neurologic symptomatology should be screen in order to make a better orientation to differential diagnosis. To cut it short and clear to you first of all arrhythic reasons should be immediately excluded with exams I recommended; after that you could be more relaxed and have enough time to proceed to other reasons. Hope to have been helpful. Greetings from Dr. Iliri