Hi My husband 80/7 has had a problem with 100 pt. swing. He recently had an aorta valve replaced and completely drove the surgeon and cardiologist crazy with his BP swings. We have finally given up and only worry when it goes below 100. Then it is "feet up. chicken boulion consumed" After an hours rest things are back to normal. I hope to do more research, and was delighted to hear that there was such disease so that perhaps I can help him and our Drs. learn more. FMorgan238 Los Angeles