RESUMO
<p><b>OBJECTIVE</b>To observe the effects of oral administration of guanxin II decoction (GX II) on cardiovascular function, especially on the dynamics of coronary blood flow in healthy males.</p><p><b>METHODS</b>Changes of heart rate, diastolic pressure, systolic pressure, left ventricular ejection fraction (LVEF), E peak, A peak, E/A value of mitral flow, diastolic peak velocity (Vmax) and diastolic flow velocity time integrals (VTI) of left anterior descending coronary artery (LAD) in 11 healthy male subjects were measured before and after oral administration of GX II, using non-invasive echocardiogram.</p><p><b>RESULTS</b>Compared with those before GX II administration, the changes after administration in heart rate, systolic pressure, diastolic pressure, LVEF, E peak, A peak and E/A value, were insignificantly different (P>0.05), but the Vmax and VTI significantly increased at 30 min, 60 min, 90 min and 120 min after GX II administration (P<0.05).</p><p><b>CONCLUSION</b>To increase the coronary blood flow is possibly one of the mechanisms of GX II in treating coronary heart disease and angina pectoris.</p>