HOUSTON, Texas, June 4 -- Rice University posted the following news release: * * * Engineered with heart: Student-designed device could streamline imaging for cardiac procedures * Irregular heartbeats affect more than 4 million Americans, and for many, the treatment is cardiac ablation -- a procedure that uses long, flexible catheters inserted through blood vessels to modify small areas of the heart and restore a normal rhythm. It is a routine yet delicate procedure that requires constant re  more