Type 2 diabetes and the progression of visualized atherosclerosis to clinical cardiovascular events - PubMed (original) (raw)
. 2013 Aug 10;167(3):776-80.
doi: 10.1016/j.ijcard.2012.03.042. Epub 2012 Apr 6.
Affiliations
- PMID: 22483261
- DOI: 10.1016/j.ijcard.2012.03.042
Type 2 diabetes and the progression of visualized atherosclerosis to clinical cardiovascular events
Christoph H Saely et al. Int J Cardiol. 2013.
Abstract
Background/objectives: We prospectively evaluated to what extent pre-existing coronary artery disease (CAD) accounts for the increased vascular event risk of patients with type 2 diabetes (T2DM).
Methods: Vascular events were recorded over 8 years in 750 consecutive patients whose baseline CAD state was verified angiographically.
Results: The baseline prevalence of CAD (87.8% vs. 80.4%; p=0.029) and of significant coronary stenoses ≥ 50% (69.5% vs. 58.4%; p=0.010) as well as the extent of CAD, i.e. the number of significant coronary stenoses (1.7 ± 1.6 vs. 1.4 ± 1.5; p=0.014) was higher in patients with T2DM (n=164) than in non-diabetic subjects. During follow-up, T2DM predicted vascular events (n=257) independently from the presence and extent of baseline CAD (HR 1.36 [1.03-1.81]; p=0.032); conversely, the presence and extent of baseline CAD predicted vascular events independently from T2DM (HRs 3.29 [1.93-5.64]; p<0.001 and 1.37 [1.23-1.53]; p<0.001, respectively). The relative risk increase conferred by T2DM was not significantly modulated by the presence of baseline CAD (p(interaction)=0.415). However, in absolute terms the risk increase conferred by T2DM was driven by an extremely high 53.5% event rate of patients with both T2DM and significant CAD at baseline; individuals with T2DM but without significant baseline CAD showed a significantly lower event rate (22.0%; p<0.001).
Conclusions: T2DM and angiographically visualized coronary atherosclerosis are mutually independent predictors of vascular events. The overall risk increase conferred by T2DM is driven by accelerated progression of pre-existing atherosclerosis to clinical cardiovascular events; vascular risk is much lower in diabetic patients without pre-existing significant CAD.
Keywords: Coronary angiography; Coronary artery disease; Progression of cardiovascular disease; Prospective study; Type 2 diabetes; Visualized atherosclerosis.
Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.
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