biomedical engineering + bioengineering

hello
im graduate student and i got my bachelor degree in mechanical eng.
my GPA in low about 2 out of 4 but i have 2 articles in biomedical engineering and both of them awarded praises in dominant conferences in iran and Barcelona electrocardiography annual conference .
and i have a hypothesis in prognosis and diagnosis of brugada syndrome.
my toefl is 90
and im going to have GRE exam in Dec.

and i have 1 year experience working in iran khodro company (IKCO. the greatest car factory in middle east) as administer in air pollution analysis ( SHED ) the research segment.


Do you have any suggestion for me ? please suggest me a few universities which i have a higher chance there ! thank you

P.s: im a great tennis player and i'm an adroit painter too.