Provided is a method of selecting a stent for implantation in the circulatory system of a human being. The method comprises obtaining a blood sample from a patient who requires implantation of a stent and testing said blood sample to determine a platelet coagulability level. The determined platelet coagulability level of said blood sample is compared with a threshold level of blood platelet coagulability. A determined platelet coagulability level above said threshold level indicates that a risk of restenosis is relatively high. If the determined platelet coagulability level is below said threshold level, a bare metal stent is selected. If the determined platelet coagulability level is at or above said threshold level, a drug-eluting stent is selected.