Tim McAfee, director of CDC’s Office on Smoking and Health, believes that even more acceptance of marijuana as a harmless drug is driving its increased use among teens. During the last 10 or 15 years, there’s been a change in public perception of marijuana, he said. There is the idea that marijuana isn’t something you have to worry about. Because marijuana has been illegal, little is well known about its long-term effects, McAfee added.Since only 407 individuals had levels above the 99th %ile for apparently healthy topics , the troponin T levels dependant on the highly delicate assay appear to provide independent prognostic info below this limit. Of the 3679 individuals, 3630 had troponin T levels that might be expected to be undetectable by the conventional assay , suggesting that the newer troponin T assay provides powerful prognostic details in patients who have undetectable amounts with the conventional assay. Heart Failure During follow-up there were 104 first hospitalizations for nonfatal or fatal center failure. In unadjusted analyses, the incidence of heart failing increased with increasing degrees of troponin T .