Hi @stanimal, was your nuclear test PET MPI or SPECT MPI? Did they quantify your blood flow? Any stenosis information from your CT scans? If you have no blockages/obstruction, I wouldn't be discouraged! I have a lower calcium score but my recent coronary CT angiogram shows a 50% stenosis in mid-LAD, which worries me; my cardiologist wants me to do a stress cardiac MRI MPI as soon as possible. But like you I super active, around 15 hours per week of vigorous or intense exercise, with no angina or other symptoms.