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心绞痛发作时,应首选硝酸甘油舌下含服缓解心绞痛发作。硝酸甘油是一种硝酸酯类药物,可直接松弛冠状动脉,使周围血管扩张,外周阻力和回心血量减少,心脏排血量降低,心负荷减轻,心肌耗氧量减少,改善心肌里氧的供需平衡,因而心绞痛得到缓解。此外,硝酸甘油还能促进心脏侧枝循环的形成,增加心肌的血液供应。 硝酸甘油为白色片剂,每片的剂量为0.6毫克(进口)或0.5毫克(国产)。前者片剂较小,溶化较
Angina pectoris attack, nitroglycerin sublingual choice should be the preferred relief of angina pectoris. Nitroglycerin is a nitric ester drugs that directly relax the coronary arteries, peripheral vasodilation, peripheral resistance and blood back to reduce blood flow, reduce cardiac output, cardiac load reduction, myocardial oxygen consumption decreased, improve myocardial oxygen Supply and demand balance, angina pectoris eased. In addition, nitroglycerin can also promote the formation of cardiac collateral circulation, increased myocardial blood supply. Nitroglycerin is a white tablet, each dose of 0.6 mg (import) or 0.5 mg (domestic). The former tablets smaller, more dissolved