Brief Answer:
Hi and welcome to XXXXXXX
Detailed Answer:
Thanks for the query.
First,in medicine you should never treat laboratory findings,you need to treat the disease. So if you dont have any symptoms such as breathing difficulties, legs swelling or
bleeding disorder, you dont have to be concerned. D-dimers is test for evaluating deep vain trombosis,
pulmonary embolism and other coagulation disorders but also it can be elevated in some
liver diseases, rheumatoid , any kind of inflammation/infection, trauma,
pregnancy, recent surgery or in advanced age.
Secondly,350 ddimers is by some authors still within normal range,actually some labs consider upper limit to be 350. So it is questionable is it abnormal ddimer result at all.
If you dont have those symptoms I ve mentioned above,you should just repeat test in 1 month and see will there be still elevation. If yes, then you should do more detailed hematologic tests,but I am sure it will be fine.
Wsh you good health. Feel free to ask.