Dear Doctor,

my father is a heart patient last 2 year before he have a engage a stents into his heart (2 stents) and after that they fell better last 10 days before they went to some cold place and when they where back they have some problem into chest (means felling pain) yesterday we have make all the test but most of the reports are normal as informed by doctor only the report of TMT is changed approx 6 to 7 month before we have also make there all test into that report shows the TMT is 48 and on current report it was 44.
can u please suggest me what to do and also know is there any kind of serious issue
and 1 more thing the doctors are also suggesting the angiography
please help me out on same