Glad the echo went well. I know what a relief that must have been. Hope they can find the cause pretty quickly. Tachycardia can sometimes just be some physiological reaction to stress. (Of course, nobody has any stress nowdays.....right!) My husband's cardiologist suggests it was something he was born with, but just took 50 years to show up. Anyway....you will still be in my prayers and please keep us all updated! Give your wife an extra hug and kiss, and I hope you tell her that she is "your one in a million".