应用经胸冠状动脉血流显像技术评价支架术前后冠脉血流储备Noninvasive assessment of coronary flow reserve using transthoracic coronary flow imaging before and after successful coronary stent implantation
王祥,刘俐,曾秋棠,王建文,杨娅,谢明星,毛奕,冯义柏,曹林生
摘要(Abstract):
目的 采用经胸多普勒超声心动图冠状动脉血流显像技术观察支架术前后冠状动脉血流速度的变化,评价其对冠状动脉血流储备(CFR)的影响。方法 22例冠心病患者(男18例,女4例),平均年龄(53.2±6.7)岁。对狭窄的冠状动脉行经皮冠状动脉腔内成形术(PTCA)后各置入一枚支架。分别于木前、术后72h内采用经胸多普勒冠状动脉血流显像技术记录狭窄远端静息舒张期血流峰速(r-Vd)、注射潘生丁及等长握力实验时最大舒张期血流峰速(d-Vd)及CFR。结果 22例患者行支架术均获成功,狭窄率由术前(83.5±8.9)%,降至术后(5.2±9)%(P<0.05)。20支冠脉获得理想多普勒频谱(检出率90.9%);支架术后r-Vd较术前r-Vd有增加趋势,但无统计学意义;术后静脉注射潘生丁后最大 d-Vd及 CFR均较术前明显增加[(0.92 ± 0.22)m/s vs(0.52± 0.18)m/s,2.94±1.16 vs1.88±0.40,P均<0.01]。30%患者术后CFR仍<2.0,此组与CFR≥2.0患者组比较,支架术后v-Vd明显增高[(0.45± 0.19)m/s vs(0.27+ 0.12)m/s, P< 0.05]。少数患者(约18%,4/22)
关键词(KeyWords): 支架;血流储备;血流显像
基金项目(Foundation): 湖北省科委“九·五”科技攻关课题资助(编号96271101)
作者(Author): 王祥,刘俐,曾秋棠,王建文,杨娅,谢明星,毛奕,冯义柏,曹林生
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