OBJECTIVE: To investigate the combination of traditional Chinese and western medicine in the treatment of cardiovascular diseases based on the real medical data in primary hospitals

so as to provide references for rational application of Chinese and western medicine in primary hospitals. METHODS: Totally 90 064 outpatient prescriptions in the hospital information system from 12 primary hospitals from 2019 to 2020 in Yanqing District

Beijing were selected

information related to patients with cardiovascular diseases in 33 234 prescriptions for cardiovascular disease and 9 649 prescriptions for combination application of Chinese and western medicine were extracted. Descriptive statistical analysis was performed on general information and disease conditions of patients with cardiovascular diseases

frequency analysis was used to explore the combined application of Chinese and western medicine in patients with cardiovascular diseases

and Apriori association rule algorithm was adopted to analyze the pattern of combined application of traditional Chinese and western medicine in primary hospitals. RESULTS: From2019 to 2020

outpatient prescriptions for cardiovascular diseases accounted for 36. 90% of the total outpatient prescriptions in 12 primary community hospitals in Yanqing District

Beijing. Among the 33 234 outpatient prescriptions for cardiovascular disease

prescriptions for combined application of traditional Chinese and western medicine accounted for 29. 03%; prescriptions for patients > 45 years accounted for 96. 56%（ 9 317 prescriptions）;prescriptions for female patients（ 4 956 prescriptions

51. 36%） was more than male patients（ 4 693 prescriptions

48. 64%）; prescriptions for patients with hypertension

coronary heart disease and hypercholesterolemia accounted for71. 59%（ 6 908 prescriptions）

of which the prescription for hypertension was the most

totally 3 874 prescriptions

accounting for 40. 15%. Among the prescriptions for combined application of traditional Chinese and western medicine

the number of categories of traditional Chinese and western medicine were respectively 312 and 223

the categories of traditional Chinese medicine with high use rate included traditional Chinese topical ointment

Ganmao Qingre granules

Fufang Danshen preparation（ tablets and dropping pill）

Huoxiang Zhengqi preparation（ oral liquid and soft capsule） and Niuhuang Qingxin pill

and that of western medicine included aspirin

amlodipine

nifedipine and atorvastatin; the categories of combined application of traditional Chinese and western medicine mainly involved combination among anti-hypertensive drugs

antiplatelet drugs

lipid-regulating drugs and blood-regulating recipe

tonic prescription and diaphoretic recipes; results of the association analysis showed that among the drugs with high confidence in the combined application of traditional Chinese and western medicine

western medicine were relatively unchanged

including aspirin

nifedipine and amlodipine

while there were more categories of traditional Chinese medicine

including Xuesaitong preparation（ tablets

soft capsules

capsules and injections）

Maixuekang capsule

Naoxintong capsule

Tongxinluo capsule

Shexiang Baoxin pills and Yinxing preparation（ drop pills

tablets

capsules and injections）; in terms of combined application of western medicine

the confidence coefficient of statins and aspirin was higher; in terms of the combined application of traditional Chinese medicine

the confidence coefficient of Jinkui Shenqi pill and Wuling capsule

Xuesaitong preparation（ tablets

soft capsules

capsules and injections） and Fufang Danshen preparation（ tablets and dropping pill）

Biqi capsules and Dahuoluo preparation（ pills and capsules） were higher. CONCLUSIONS: In the real world

primary hospitals have the phenomenon of more patients with cardiovascular diseases

more prescriptions for combined application of traditional Chinese and western medicine and more varieties of combined application of traditional Chinese and western medicine

the combined application of traditional Chinese and western medicine is quite common

so that primary clinicians should pay attention to the benefits and risks.