Over a median 1.9 years of follow-up , patients with both troponins above the median had significantly higher risk for stroke/systemic embolism [ hazard ratio ( HR ) 1.72 ( 95 % CI 1.31-2 .27 ) ] , cardiac death [ 3.14 ( 2.35-4 .20 ) ] , and myocardial infarction [ 2.99 ( 1.78-5 .03 ) ] than those with both troponins below median ( all P < 0.005 ) .