“…Surprisingly, an erratic INR, merely a consequence of poor medical follow up, compromises survival. The incidence of thromboembolism and haemorrhage for ATS valves, in our experience, seems to compare favourably to those reported in some other mechanical valve series 12−14 . Moreover, aortic valve patients, in general, carry more risk for anticoagulation‐related haemorrhage than thromboembolic events under normal anticoagulation dosage, as advocated by some authors 15 .…”