Ive been having a problem - everytime I stand up I get light headed and shortness of breathe and can not catch me breathe until I sit down and rest.  I had heart ablation in May and have been lowering my coreg intake - family doctor this this is causing my problem but it does not seem to be going away.  Also have abdominal discomfort  -  I had an ulcer in early 90s  Im only 51 yrs old and want to get back to being active this going on for over 2 wks..
Thanks for your question on Chat Doctor. I can understand your concern. You are having breathlessness on exertion (standing) and relieved by sitting and resting. This is characteristic feature of heart disease. So better to consult cardiologist and get done 1. Blood pressure monitoring 2. ECG 3. 2d echo 4. Stress test (trade mill test). You may need diuretics and other cardiac supportive Chat Doctor.  Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.