Starting several months ago, I began to experience a pounding & fullness in my ears after car rides of 20 mins or more. I have high blood pressure, however it s been treated successfully for years. My GP says that it s still normal. A visit to an ENT revealed nothing, even after a head CT. The radiologist did remark my left cardriod artery is larger than the right, yet the ENT wasn t concerned with that observation. Any suggestions?