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长期闭塞的冠脉在成形术后再狭窄发生率很高。其原因可能是竞争性血流或者冠脉血流缓慢。在PTCA之前并在PTCA成功之后,测定长期闭塞冠脉和严重狭窄冠脉的流速。35例对象中,A组12例一支冠脉长期闭塞,B组23例一支冠脉严重狭窄,测定静息流速和给予罂粟碱后最大扩张时流速。在PTCA之前,A组病变冠脉静息流速均值低
Long-term occlusion of coronary arteries in the restenosis after high incidence. The reason may be competitive blood flow or coronary blood flow is slow. Prior to PTCA and after successful PTCA, the flow rates of long-term occluded and severely stenosed coronary arteries were determined. Of the 35 subjects, 12 patients with long-term coronary artery occlusion in group A and 23 patients with severe coronary artery stenosis in group B received resting gas flow and the maximum expansion after administration of papaverine. Prior to PTCA, the average coronary resting flow velocity in group A was low