The sundial and the stopwatch.
Gibson
C M
CM
D017023:Coronary Angiography; D003326:Coronary Circulation; D005343:Fibrinolytic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D009203:Myocardial Infarction / Q000000981:diagnostic imaging / Q000188:drug therapy*; D015203:Reproducibility of Results; D015912:Thrombolytic Therapy; D013997:Time Factors
D005343:Fibrinolytic Agents