Abstract Background Cardiovascular disease is the leading cause of mortality and morbidity worldwide. Chronic stable angina (CSA) is the main symptom of myocardial ischemia. causes increased risk of major cardiovascular events such as sudden cardiac death and myocardial infarction. Naoxintong (NXT) capsule is a classical traditional Chinese medication used to treat CSA. https://www.shopredoners.shop/product-category/3-pack-ribbed-tank/