I have had a pouding of heart for a month, I have had ekg, echocardiogram, carotid artery test and been to urgent care facilities 3 times and they come back everything normal. I have high blood pressure, high cholesterol, copd but everything stays normal by medication which I faithfully take every day. I am also on Xanax for sleep. I have a large heital hernia halfway up my chest. I also have menieres disease of the ears . I feel the pounding in chest but also in the left ear. Today doctors gave me a steroid shot and diazide thinking it could be menieres because they saw fluid in my ears and I have had sinus problems which I took over the counter anthistamine. What could possibly be causing this and they cannot find anything? Thanks, deb