Enas Enas A, Pazhoor Hancy Chennikkara, Kuruvila Arun, Vijayaraghavan Krishnaswami
Coronary Artery Disease in Asian Indians (CADI) Research Foundation Lisle, IL USA.
Indian Heart J. 2011 May-Jun;63(3):211-27.
The underlying disorder in the vast majority of cases of cardiovascular disease (CVD) is atherosclerosis, for which low-density lipoprotein cholesterol (LDL-C) is recognized as the first and foremost risk factor. HMG-CoA reductase inhibitors, popularly called statins, are highly effective and remarkably safe in reducing LDL-C and non-HDL-C levels. Evidence from clinical trials have demonstrated that statin therapy can reduce the risk of myocardial infarction (MI), stroke, death, and the need for coronary artery revascularization procedures (CARPs) by 25-50%, depending on the magnitude of LDL-C lowering achieved. Benefits are seen in men and women, young and old, and in people with and without diabetes or prior diagnosis of CVD. Clinical trials comparing standard statin therapy to intensive statin therapy have clearly demonstrated greater benefits in CVD risk reduction (including halting the progression and even reversing coronary atherosclerosis) without any corresponding increase in risk. Numerous outcome trials of intensive statin therapy using atorvastatin 80 mg/d have demonstrated the safety and the benefits of lowering LDL-C to very low levels. This led the USNCEP Guideline Committee to standardize 40 mg/dL as the optimum LDL-C level, above which the CVD risk begins to rise. Recent studies have shown intensive statin therapy can also lower CVD events even in low-risk individuals with LDL-C <110 mg/dL. Because of the heightened risk of CVD in Asian Indians, the LDL-C target is set at 30 mg/dL lower than that recommended by NCEP. Accordingly, the LDL-C goal is < 70 mg/dL for Indians who have CVD, diabetes, metabolic syndrome, or chronic kidney disease. Intensive statin therapy is often required in these populations as well as others who require a > or = 50% reduction in LDL-C. Broader acceptance of this lower LDL-C targets and its implementation could reduce the CVD burden in the Indian population by 50% in the next 25 years. Clinical trial data support an extremely favorable benefit-to-risk ratio of intensive statin therapy with some but not all statins. Atorvastatin 80 mg/d is 100 times safer than aspirin 81 mg/d and 10 times safer than diabetic medications. Intensive statin therapy is more effective and safe compared to intensive control of blood sugar or blood pressure in patients with diabetes.
绝大多数心血管疾病(CVD)的潜在病症是动脉粥样硬化,其中低密度脂蛋白胆固醇(LDL-C)被认为是首要危险因素。3-羟基-3-甲基戊二酰辅酶A还原酶抑制剂,通俗地称为他汀类药物,在降低LDL-C和非HDL-C水平方面非常有效且极为安全。临床试验证据表明,他汀类药物治疗可将心肌梗死(MI)、中风、死亡风险以及冠状动脉血运重建术(CARP)的需求降低25%-50%,具体降幅取决于LDL-C降低的幅度。无论男女、老少,无论是否患有糖尿病或先前已诊断为CVD,均可从中获益。将标准他汀类药物治疗与强化他汀类药物治疗进行比较的临床试验清楚地表明,强化治疗在降低CVD风险(包括阻止病情进展甚至逆转冠状动脉粥样硬化)方面具有更大益处,且风险并未相应增加。使用阿托伐他汀80毫克/天进行强化他汀类药物治疗的众多结局试验已证明将LDL-C降至极低水平的安全性和益处。这使得美国国家胆固醇教育计划(NCEP)指南委员会将40毫克/分升定为最佳LDL-C水平,高于此水平CVD风险开始上升。最近的研究表明,强化他汀类药物治疗即使在LDL-C<110毫克/分升的低风险个体中也能降低CVD事件。由于亚洲印度人患CVD的风险较高,LDL-C目标设定为比NCEP建议的水平低30毫克/分升。因此,对于患有CVD、糖尿病、代谢综合征或慢性肾脏病的印度人,LDL-C目标是<70毫克/分升。在这些人群以及其他需要将LDL-C降低≥50%的人群中,通常需要强化他汀类药物治疗。更广泛地接受这一较低的LDL-C目标并加以实施,有望在未来25年内将印度人群的CVD负担降低50%。临床试验数据支持某些(但并非所有)他汀类药物强化治疗具有极其有利的效益风险比。阿托伐他汀80毫克/天比81毫克/天的阿司匹林安全100倍,比糖尿病药物安全10倍。与糖尿病患者强化控制血糖或血压相比,强化他汀类药物治疗更有效且更安全。