Takayasu's arteritis is a rare type of vasculitis disease. In Takayasu's arteritis, the inflammation damages the aorta, the pulmonary artery and major arteries that arise from the aorta. TA is also known as aortic arch syndrome. Treatment is medications and surgical approach like bypass, vessel widening and aortic valve repair or replacement. Regarding the symptoms experienced, you need to consult a cardiologist. Let him evaluate the patient and guide you accordingly. You can also refer to other experts for their second opinions - 10 Best Cardiologist in India.
As per my understanding, the patient is having LVEF 10% and is walking and talking normally (leading a normal active healthy life). To me it seems to one of the rare case where a person having LVEF 10% and leading active healthy life. You should consult a cardiologist and get the ECHO repeated either there may a mistake in the previous report or if it's a miracle then it should be studied further. Get in touch with experts from Best Cardiologists in Mumbai, or page of any other city. Hope our answer helps you.