In what all ways can magnetic nanoparticles with various biocompatible coatings be used for dealing with cardiovascular disorders? What are the newer imaging modalities which can be incorporated without any side effects?
Check out the research of Dr. Robert Levy, for example, at CHoP in Philly:
http://www.research.chop.edu/people/robert-j-levy
He, along with colleagues (other names to search: Chorny, Fishbein, Muzykantov, Polyak), show some methods to leverage magnetic nano particles to target stents (or other intravascular devices). This could be used both for drug or cell delivery.
Alternately, magnetic nano particles are used for imaging. See this review: