Among vascular deaths , there were significantly fewer sudden deaths ( 63 ( 0.7 % ) vs 98 ( 1.1 % ) , p < 0.01 ) but no significant difference in deaths caused by acute myocardial infarction ( 179 ( 1.9 % ) vs 194 ( 2.1 % ) , p = 0.43 ) or heart failure ( 31 ( 0.3 % ) vs 42 ( 0.5 % ) , p = 0.20 ) with ticagrelor compared with clopidogrel .