Diabetes mellitus, platelet function and acetylsalicylic acid
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Abstract
Diabetes mellitus is an independent risk factor for cardiovascular disease (CVD). Accelerated development of atherosclerosis in patients with diabetes is a consequence of endothelial dysfunction, low-grade inflammation, oxidative stress, dyslipidemia, and platelet dysfunction. The results of studies have shown that among diabetic patients there is a high percentage of no effect when using both acetylsalicylic acid (ASA) and clopidogrel. It is necessary to distinguish between patients with a weak response and people with no effect — resistant to aspirin. The frequency of the so-called aspirin resistance, according to modern research, is different and depends on the methods used to study platelet function. In diabetic patients, it ranges from 5 to 45 % when taking ASA and from 4 to 30 % when taking clopidogrel. Recent studies show an even higher proportion of such individuals among people with diabetes. The appropriateness of lifelong ASA for secondary prevention in people diagnosed with CVD is indisputable (level of evidence A). At the same time, approaches to primary prevention vary in different countries. It is emphasized that the primary prevention with ASA in modern conditions maintains a favorable balance of benefits/risks. The new guidelines state that the calculated 10-year risk of cardiovascular events should not be considered when deciding whether to prescribe ASA to patients without CVD. Instead, all risk factors present in each patient should be considered, including burdensome family history, inability to achieve lipid and glycemic levels, and coronary calcification. The conclusion that ASA has evidence-based efficacy in secondary prophylaxis in patients with CVD has been confirmed. Regarding the primary prevention of cardiovascular events, including healthy individuals, the appropriateness, duration of administration, and choice of ASA should be determined taking into account the 10-year development of serious events, the presence of comorbidities, and the risk of bleeding.
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