ABSTRACT
Objective To investigate the effect of enhanced external counterpulsation (EECP) on plasma lipoprotein phospholipase A2 (LP-PLA2) levels, vascular endothelial diastolic function in patients with unstable angina. Methods One hundred patients with unstable angina treated in our hospital were randomly divided into routine treatment group (control group n-49) and external counterpulsation group (observation group n = 51, routine treatment plus external counterpulsation therapy, 60 min/time, a total of 30 times). All selected subjects were tested for LP-PLA2 levels on the day of enrollment and on the 30 th day after treatment, and color Doppler ultrasonography was used to detect arterial blood flow-mediated vasodilation (FMD) and nitroglycerin-mediated vasodilation (NMD). Results After treatment in the observation group, LP-PLA2 decreased compared with before treatment, the difference was statistically significant (P < 0.05) , but FMD, NMD were higher than those before treatment, which had statistical difference (P < 0.05). In control group treatment afterwards, LP-PLA2, endothelium-dependent vasodilatation and non-endothelium-dependent vasodilatation did not change significantly before treatment (P> 0.05). Observations between groups showed that the increase in FMD and NMD in the observation group was significantly greater than that in the control group. P < 0.01) , plasma LP-PLA2 levels in the observation group also decreased compared with the control group (P < 0.05). Conclusion Enhanced external counterpulsation can reduce the level of LP-PLA2 in patients and improve endothelial diastolic function under the action of blood flow shear stress.
