I am impressed, what a great article. About 4 years ago I saw an Internist for this as well as a slight tremor and "heart problems". My heart problems were in two parts: Up and down blood pressure, and an occasional hard, rapid, thumping in my chest. It turned out that the thumping was that valve in my throat. Could that be caused by acid reflux? David Meigs aka: Pappy [log in to unmask]