question: If a 44 years old male is shown in CXR to have cardiac size is on high side of normal with mild unfolding of aortic arch, however, his treadmill EKG is perfectly normal achieving 11 met, with max HR at 176.  Average resting BP is 130/80. Had history of high alchohol consumption, current AST & ALT normal, GGT is 1.7X of normal limit.  Would his CXR be a false positive or true positive of having a slight heart enlargement ?