Objective To observe the therapeutic effect of lung-boosting

blood-quickening and phlegm-flushing decoction（ LBPD） for chronic pulmonary heart disease.Methods Ninety patients with chronic pulmonary heart disease in remission were randomized into the treatment group and control group

with 45 in each.The control group was given routine western medicine.The treatment group was added with LBPD one dose daily.The treatment lasted for 4 weeks（ 2 treatment courses）.The efficacy and the changes of blood gas analysis

hemorheology and lung function were observed and compared.Results The total effective rate of the treatment group and control group was91.1% and 75.6% respectively

with a significant difference between groups（ P < 0.01）.The values of PaO2and PaCO2were significantly improved in both groups after treatment（ P < 0.05）

especially in the treatment group（ P <0.05）.The whole blood viscosity at high and low shear rates

plasma viscosity

fibrinogen and platelet aggregation rate were significantly decreased in both groups after treatment（ P < 0.05）

especially in the treatment group（ P <0.05）.The forced expiratory volume in one second

maximum voluntary ventilation and peak expiratory flow rate were significantly improved in both groups after treatment（ P < 0.05）

especially in the treatment group（ P < 0.05）.Conclusion LBPD can effectively reduce plasma viscosity

inhibit platelet aggregation and improve microcirculation

lung function and efficacy.