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(一)硝酸甘油类抗心绞痛药物很多。从药物学也不属于同一族类。但最常用的是某些用于治疗心绞痛的血管扩张剂。其中短效的硝酸盐类和亚硝酸盐类药物对许多病人有效,硝酸甘油即为最有效的药物之一。在缓解症状方面舌下含药立即生效。但仅持续20—30分钟。其作用不是扩张狭窄的冠脉,而是减少静脉回心血量从而减少心室的每搏输出量,收缩压下降和减轻心脏负担。但对严重心绞痛反复投药虽是必要但可产生副作用。如颜面发红头痛,体位性低血压等
(A) nitroglycerin anti-angina drugs a lot. From pharmacology do not belong to the same family. But the most common ones are some of the vasodilators used to treat angina. Short-acting nitrates and nitrites are effective in many patients and nitroglycerin is one of the most effective drugs. Sublingual medication to relieve symptoms takes immediate effect. But only lasts 20-30 minutes. Its role is not to expand the narrow coronary artery, but to reduce the amount of venous blood back to reduce ventricular stroke volume, systolic blood pressure and reduce the burden on the heart. However, repeated administration of severe angina is necessary but may have side effects. Such as face red headache, orthostatic hypotension