Crp level of 7.3 does it mean infection or could it be something else like heart disease? had infection on foot but heart disease runs in family.

Both: C reactive proyein is a non specific marker of inflammation. May elevate with infection, heart isease and rheumatologic disease.

Nonspecific marker: CRP is a nonspecific marker of inflammation. It is increased in all inflammatory disease states including cad. In the absence of another inflammatory condition CAD ought o be a consideration. A high CRP predicts a higher risk for cv events.

Elevated CRP...: And/or sedimentation rate correlates with infection or inflammation which can occur with some forms of heart disease like endocarditis, infection of a heart valve, but not coronary artery disease ..At least not a substantially high one like this.