A randomized, double-blind, placebo-controlled, multicenter clinical trial of Jiuxin pill in the treatment of stable angina pectoris in patients with coronary heart disease

INTERVENTION: Control group :Western medicine routine treatment + Jiuxin pill placebo ;Treatment group :Western medicine routine treatment + Jiuxin pill ; CONDITION: Stable Angina Pectoris PRIMARY OUTCOME: Seattle Angina Questionnaire (SAQ) Score;Treadmill Exercise Test: Total Exercise Time; SECONDARY OUTCOME: Borg Perceived Exertion After Exercise;Treadmill Exercise Test: Metabolic Equivalent;Scoring of Four Diagnostic Information of Traditional Chinese Medicine;Treadmill Exercise Test: Maximum ST Segment Depression;Usage of Nitroglycerin, Drug Withdrawal and Reduction Rate;Treadmill Exercise Test: 1‐minute Heart Rate Recovery;Average Number of Angina Attacks Per Week;Incidence of Major Adverse Cardiovascular Events; INCLUSION CRITERIA: 1.age from 35 to 74 (including boundary value), gender is not limited; 2.Conform to the western medicine diagnostic criteria for stable angina pectoris of coronary heart disease; 3.The history of stable angina pectoris shall not be less than 2 months; 4.The average number of angina pectoris attacks per week= 1 in the first month before being selected; 5.Canadian Cardiovascular Society (CCS) angina pectoris classification is grade II ‐ III; 6.Sign informed consent.