Answer questions 1-3 with the following information: A study wasrecently carried

Answer questions 1-3 with the following information: A study wasrecently carried out in Demark comparing two drug-eluting stentsfor coronary artery disease (Lancet 375: 1090-1099 2010). Stentsare used to open the blood flow through partially or fully occludedcoronary arteries that supply blood to the heart muscle. (When thevessels occlude and the muscle they supply dies this is amyocardial infarction or heart attack.) Research over the yearshave found that stents themselves can also occlude although therate of occlusion is lower when stents are coated with drugs thatinhibit the revascularization of arteries. This recent Danish studycompared a new (experimental) agent sirolimus with an existing(control) agent known to reduce occlusion zotarolimus. The primaryend-point of the study was a composite measure of cardiac deathmyocardial infarction and blood vessel revascularization. Patientswere followed for 18 months.