Thanks for using Healthcaremagic,
I have gone through all the details provided by you, Your Treadmill test is positive on ECG changes criteria.
is advised to know the exact coronary anatomy and presence of blockage in any coronary artery
CT angiograms will expose you to a small amount of radiation
This is non invasive test unlike routine catheter angiography.
A computerized tomography
(CT) coronary angiogram is an imaging test to look at the arteries that supply your heart muscle with blood(Coronary arteries).
Your treadmill is mildly positive and it is unlikely that significant blockage will be detected hence CT Angio is advised.If there are no blockages in coronary arteries then only medical treatment is required.
In case coronary blockages are detected then conventional angiography with angioplasty
would be required.
Hope this clears your doubts.
Dr.Akhilesh Dubey M.D.