Hello Dr. Stephen, My father had gone through heart bypass surgery 5 months back. Today he undergone TMT test and it came out to be mild positive. Is it normal? Generally how much time it takes for patient to recover completely. Thanks for your response in advance.
The stress test is not the most specific test for blockages, its specificity is 50-75 %, which means than it may be false positive in 1/4 of patients, where you have no problem in spite of it being positive. As such you can do stress test less than 3 of bypass or stents.  I would suggest a thallium scan or CT Angiography to know the status of grafts if facility is available, or else a repeat stress test after 3 months to know if there is any increase Regards Chat Doctor.