Efficacy and Safety Study of Guanxin Shutong Capsule to Treat Chronic Stable Angina

Inclusion Criteria: * Symptom of chronic stable angina is sustained for 3 months or over 3 months (typical symptoms of myocardial ischemia occurred at least 2 times in the latest week, and angina type is stable angina (Canada CCS class Ⅰ、Ⅱ or Ⅲ); * Blood stasis resistance on traditional Chinese medicine syndrome differentiation; * Patients who meet the following any situation: 1. had coronary angiography and verified a least one main branch of coronary stenosis ≥50%; 2. have typical angina symptom, and also have positive ETT result or CTA shows at least one main branch of coronary stenosis ≥50%; 3. had history of myocardial infarct (at least 6 months). * Written informed consent. Exclusion Criteria: * Acute coronary syndrome or highly suspected acute coronary syndrome; * Variant angina or unstable angina; * Myocardial infarction within the past 6 months; * Left main disease and without revascularization was verified through angiography or CTA; * Moderate to severe aortic stenosis, hypertrophic Obstructive Cardiomyopathy or congestive heart-failure (NYHA class Ⅲ-Ⅳ); * Patients who were received PCI/CABG within 1 year; * Patients who are poor control of high blood pressure (SBP\>170mmHg, or DBP\>100mmHg); * Patients who have hypotension (SBP\<90mmHg, DBP\<60mmHg) or had orthostatic hypotension; * ECG shows complete left bundle branch block, pre-excitation syndrome, left ventricular hypertrophy or pacemaker rhythm; * Hypohepatia (ALT or bilirubin level is higher than upper limit), renal insufficiency (serum creatinine level is higher than upper limit); * Active peptic ulcer or skin ulcer; * Diagnosed chest pain caused by severe neurosis, menopausal syndrome, hyperthyroidism, cervical spondylosis, gallbladder-cardiac syndrome, gastroesophageal reflux, esophageal hiatus hernia or in aortic dissection; * Patients had hematological disorder, specific bleeding or warfarin caused bleeding; * Drug abuser, patients with history of alcoholism in the past 2 years or dependency to known drugs; * Psychopath; * Patients who can't compelet exercise test (note: just for partial patients who need to complete exercise test); * Pregnancy or lactation; * Patients who are known or suspected hypersensitive to the study medicine or allergic constitution; * Patients who were received big surgery within 4 weeks or participated in other clinical trials within 3 months.