My father has developed shortness of breath. He has had all the tests from stress tests to blood work and all came back great. His doctor suggested more exercise which he has done - walking and rowing - but still shortness of breath, mostly when he bends over. He gets "heaviness" in his chest also. He has had a hyoital hernia for 30 years that contributes problems of its own but surgury is not an option. He has occasional panic attacks at night that are very disorienting, accompanied by shortness of breath. He also uses an inhaler twice a day for mild asthma and 1/2 a zanex daily. My mother has just finished radiation, following chemo for breast cancer and I know he has been very stressed. He doctor says he can't find anything wrong, that he's just getting older (he's only 77!) and may have to adjust to this as a way of life. I live at an elevation of 3000 feet and when he comes to visit - which is very rare now - he says he can't breath very well. Any ideas?