Purpose: The mechanism of action and pharmacokinetics of sirolimus when used as part of a drug-eluting stent (DES) and the efficacy and cost of using DESs versus bare-metal stents are discussed.

My patients, who had a stent (that expandable mesh tube that widens a blocked artery for blood to flow and stays like that) implanted after a heart attack, always have one question. Do they need to ...

The right coronary artery (RCA) arises further caudal, at the right aortic sinus. The RCA runs through the atrioventricular groove, encircling the tricuspid orifice, reciprocal to the LCX (Figure 4).