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type=\u0022text\/css\u0022 rel=\u0022stylesheet\u0022 href=\u0022\/\/d282kpwvnogo5m.cloudfront.net\/sites\/default\/files\/advagg_css\/css__ce2QY63WIanKyr8eSq7eavr1XQRRmFD6ZSmwpyJi8lM__zXwFqpqmxrZOXXcd_TpBQpjuELbmIP9wBR5UuTDWAO4__YJWWMMdfCJuAFm5cUEp88OsodhO3ZA-2lzRfoBsSlk4.css\u0022 media=\u0022all\u0022 \/\u003E\n\u003Clink rel=\u0027stylesheet\u0027 type=\u0027text\/css\u0027 href=\u0027\/sites\/all\/modules\/contrib\/panels\/plugins\/layouts\/onecol\/onecol.css\u0027 \/\u003E\u003C\/head\u003E\u003Cbody\u003E\u003Cdiv class=\u0022panels-ajax-tab-panel panels-ajax-tab-panel-sageoa-tab-art\u0022\u003E\u003Cdiv class=\u0022panel-display panel-1col clearfix\u0022 \u003E\n  \u003Cdiv class=\u0022panel-panel panel-col\u0022\u003E\n    \u003Cdiv\u003E\u003Cdiv class=\u0022panel-pane pane-highwire-markup\u0022 \u003E\n  \n      \n  \n  \u003Cdiv class=\u0022pane-content\u0022\u003E\n    \u003Cdiv class=\u0022highwire-markup\u0022\u003E\u003Cdiv xmlns=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022 id=\u0022content-block-markup\u0022 xmlns:xhtml=\u0022http:\/\/www.w3.org\/1999\/xhtml\u0022\u003E\u003Cdiv class=\u0022article fulltext-view \u0022\u003E\u003Cspan class=\u0022highwire-journal-article-marker-start\u0022\u003E\u003C\/span\u003E\u003Cdiv class=\u0022section abstract\u0022 id=\u0022abstract-1\u0022\u003E\u003Ch2\u003ESummary\u003C\/h2\u003E\n            \u003Cp id=\u0022p-1\u0022\u003EA genetic variant that is associated with early-onset myocardial infarction (MI) is also associated with the progression of coronary atherosclerosis and the need for revascularization years after an MI, according to the Italian Genetic Study in Early-Onset Myocardial Infarction.\u003C\/p\u003E\n         \u003C\/div\u003E\u003Cul class=\u0022kwd-group\u0022\u003E\u003Cli class=\u0022kwd\u0022\u003ECardiology Genomics\u003C\/li\u003E\u003Cli class=\u0022kwd\u0022\u003EMyocardial Infarction Clinical Trials\u003C\/li\u003E\u003C\/ul\u003E\u003Cp id=\u0022p-2\u0022\u003EA genetic variant that is associated with early-onset myocardial infarction (MI) is also associated with the progression of coronary atherosclerosis and the need for revascularization years after an MI, according to study results that were presented by Diego Ardissino, MD, University of Parma, Parma, Italy.\u003C\/p\u003E\u003Cp id=\u0022p-3\u0022\u003EPrevious studies showed that genetic variants on chromosome 9 (9p21.3) are associated with ischemic heart disease [Samani N et al. \u003Cem\u003EN Engl J Med\u003C\/em\u003E 2007; McPherson R et al. \u003Cem\u003EScience\u003C\/em\u003E 2007], but it was not known if these genetic variants affected prognosis after MI.\u003C\/p\u003E\u003Cp id=\u0022p-4\u0022\u003EThe Italian Genetic Study in Early-Onset Myocardial Infarction was a nonrandomized, prospective, observational study that was conducted at more than 100 Italian coronary care centers to assess whether the 9p21.3 single nucleotide polymorphism rs1333040 would influence the occurrence of new cardiovascular events and the progression of coronary atherosclerosis after early-onset MI. Early-onset MI (defined as occurring at age 45 years or younger) was selected for the study, said Dr. Ardissino, because \u201cthe influence of genetic factors is greater when the acute coronary event occurs at an early age.\u201d\u003C\/p\u003E\u003Cp id=\u0022p-5\u0022\u003EThe study had 2 arms-a cross-sectional arm that included 2000 subjects with early-onset MI and 2000 healthy controls who were matched for age, sex, and geography, and a longitudinal arm, in which subjects (n=492) who had received primary percutaneous coronary intervention (PCI) were excluded. Dr. Ardissino reported on the longitudinal arm of the study, in which the subjects (n=1508) were followed for up to 20 years.\u003C\/p\u003E\u003Cp id=\u0022p-6\u0022\u003ESubjects (mean age at first MI 41 years; \u0026gt;85% men) were tested for 5 allelic variants in the 9p21.3 region. Each subject was classified as being homozygous for the risk allele, heterozygous for the risk allele, or \u201cwild-type\u201d (reflective of the general population). Results showed that all 5 allelic variants were associated with early-onset MI. The marker that had the strongest association (rs1333040) was chosen for statistical analysis (heterozygous OR, 1.43; 95% CI, 1.22 to 1.67; homozygous OR, 2.04; 95% CI, 2.49 to 2.79; p=1e\u003Csup\u003E-54\u003C\/sup\u003E). The clinical endpoint of the study was a composite of cardiovascular death, recurrence of MI, and need for coronary artery revascularization. The angiographic endpoint was progression of coronary atherosclerosis, as evaluated by the Duke Coronary Artery Disease Index.\u003C\/p\u003E\u003Cp id=\u0022p-7\u0022\u003ESignificant (p=0.01) differences in the time to the primary clinical endpoint were found between both the homozygous and heterozygous groups versus the wild-type group. Results diverged, however, when the components of the primary endpoint were analyzed separately, wherein a significant (p=0.00015) effect was shown on time to coronary artery revascularization (RR vs wild-type for heterozygous 1.38; 95% CI, 1.17 to 1.63 and for homozygous 1.90; 95% CI, 1.36 to 2.65) but not on time to cardiovascular death or MI recurrence. Angiographically, rs1333040 showed a significant (p=0.002) influence on progression of coronary atherosclerosis. The median change in the Duke Coronary Artery Disease Index was 19.\u003C\/p\u003E\u003Cp id=\u0022p-8\u0022\u003EThe investigators concluded that in patients with early-onset MI, the 9p21.3 single nucleotide polymorphism rs1333040 affects the progression of coronary atherosclerosis and the probability of undergoing coronary artery revascularization during long-term follow-up. Testing for genetic variants may influence treatment.\u003C\/p\u003E\u003Cul class=\u0022copyright-statement\u0022\u003E\u003Cli class=\u0022fn\u0022 id=\u0022copyright-statement-1\u0022\u003E\u00a9 2009 MD Conference Express\u003C\/li\u003E\u003C\/ul\u003E\u003Cspan class=\u0022highwire-journal-article-marker-end\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Cspan id=\u0022related-urls\u0022\u003E\u003C\/span\u003E\u003C\/div\u003E\u003Ca href=\u0022http:\/\/mdc.sagepub.com\/content\/9\/2\/20.abstract\u0022 class=\u0022hw-link hw-link-article-abstract\u0022 data-icon-position=\u0022\u0022 data-hide-link-title=\u00220\u0022\u003EView Summary\u003C\/a\u003E\u003C\/div\u003E  \u003C\/div\u003E\n\n  \n  \u003C\/div\u003E\n\u003C\/div\u003E\n  \u003C\/div\u003E\n\u003C\/div\u003E\n\u003C\/div\u003E\u003Cscript type=\u0022text\/javascript\u0022 src=\u0022http:\/\/mdc.sagepub.com\/sites\/all\/modules\/highwire\/highwire\/plugins\/highwire_markup_process\/js\/highwire_openurl.js?nzmknd\u0022\u003E\u003C\/script\u003E\n\u003C\/body\u003E\u003C\/html\u003E"}