RT Journal A1 Torn M, Rosendaal FR T1 OPtimal anticoagulation therapy in patients with valvular heart disease or atrial fibrillation—reply JF Archives of Internal Medicine JO Archives of Internal Medicine YR 2009 FD November 23 VO 169 IS 21 SP 2033 OP 2033 DO 10.1001/archinternmed.2009.421 UL http://dx.doi.org/10.1001/archinternmed.2009.421 AB With McLeod and Gersh, we believe that, in general, myocardial infarction is not merely an embolic event, but it is thrombotic, and hence “thromboembolic.” Clot formation plays an important role in myocardial infarction, even in severe atherosclerosis. Although not widely used, vitamin K antagonists are effective in preventing myocardial infarction and may well be superior to antiplatelet agents.2 Therefore, we included myocardial infarction as a thromboembolic end point.