The World Health Organization (WHO) classifies coronary heart disease into 5 major categories: namely: asymptomatic myocardial ischemia (occult coronary heart disease), angina pectoris, myocardial infarction, ischemic heart failure (ischemic heart disease), and sudden death in 5 clinical types. The main cause of coronary heart disease is coronary atherosclerosis, but the cause of atherosclerosis is not fully understood and may be the result of a combination of factors. Risk factors for coronary heart disease include modifiable risk factors and non-modifiable risk factors. Understanding and intervening in risk factors can help the prevention and treatment of coronary heart disease. Modifiable risk factors include: hypertension, dyslipidemia (high total cholesterol or high LDL cholesterol, high triacylglycerol, low HDL cholesterol), overweight/obesity, hyperglycemia/diabetes, gout, poor lifestyle including smoking, poor diet (high fat, high cholesterol, high calorie, etc.), lack of physical activity, excessive alcohol consumption, and psychosocial factors. Non-modifiable risk factors are: gender, age (men over 45 years, women over 55 years or postmenopausal), family history (father and brother died of heart disease before age 55, mother/sister before age 65). In addition, it is associated with infections, such as cytomegalovirus, Chlamydia pneumoniae, and Helicobacter pylori. Episodes of coronary heart disease are often associated with seasonal changes, emotional stress, increased physical activity, satiety, heavy smoking and alcohol consumption.