My chest tightens when at rest ie. sitting or lying in bed and, as well, when I do any activity. After heart surgery, it only tightened when I walked faster than a normal pace. For over six weeks now the tightening occurs just while at rest and when I do activies ie. housework, walking, etc.. It is getting worse as even just bending down to adjust something or sitting here causes tightening. Have had angiogram --all clear. Could this mean a blockage in other part of body?