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作 者:陈向辉[1] 崔凯[2] 胡锋[3] 查道刚[2] 修建成[2] 吴平生[2] 刘伊丽[2]
机构地区:[1]暨南大学附属第一医院心内科,广东省广州市510630 [2]南方医科大学附属南方医院心内科 [3]扬州市第一人民医院心内科
出 处:《中国循环杂志》2015年第6期573-575,共3页Chinese Circulation Journal
基 金:高等学校博士学科点专项科研基金(20134401120005);广东省自然科学基金(S2013040015434)
摘 要:目的:探讨减阻剂改善实验犬冠状动脉微循环的可行性,为其进一步治疗心肌微循环障碍提供实验基础。方法:对8只实验犬行开胸手术,选择前降支区域行心肌声学造影,依次给予静脉注射腺苷,250 mg/L的减阻剂溶液,以及减阻剂+腺苷。利用函数y=A×(1-e-βt)进行拟合,计算出心肌微循环的毛细血管容积(A值)、毛细血管血流速度(β值)及心肌血流量(A·β值)。结果:静脉注射减阻剂以后的毛细血管容积与基础状态以及静脉注射腺苷后比,差异均无统计学意义(P>0.05)。静脉注射减阻剂后与基础状态比,毛细血管血流速率[(0.57±0.10)1/s vs(0.23±0.03)1/s,P<0.01]和心肌血流量[(11.51±1.96)VI/s vs(5.15±0.86)VI/s,P<0.05]均明显增加,差异有统计学意义。但联合使用减阻剂+腺苷后毛细血管血流速率和心肌血流量与基础状态比,差异均无统计学意义(P均>0.05)。结论:减阻剂主要通过调节毛细血管血流速度来改善冠状动脉微循环血供,其独特的血流动力学疗效有望为治疗心肌微循环障碍提供新的方法。Objective: To test the feasibility of drag-reducing polymers (DRP) for improving coronary microcirculation in a canine model in order to provide the experimental basis for treating myocardial microcirculation dysfunction. Methods: A total of 8 dogs received open-chest surgery and they had intravenous injections, in turn, with adenosine (ADN), DRP 250 mg/L and DRP+ADN. The function y=A × (1-e-βt) was used to calculate the myocardium capillary volume (A value), capillary velocity (β value) and myocardial blood lfow (A ? β value) by myocardial contrast echocardiography. Results: With DRP infusion, the A value in experimental canine was similar to the baseline condition,P〉0.05; while theβ value and A ? β value were signiifcantly increased as (0.57 ± 0.10) 1/s vs (0.23 ± 0.03) 1/s,P〈0.01 and (11.51 ± 1.96) VI/s vs (5.15 ± 0.86) VI/s,P 〈0.05 respectively. With combined infusion of DRP+ADN, the β value and A ? β value were similar to the baseline condition, bothP〉0.05. Conclusion: DRP improved coronary microcirculation primarily by modulating the β value in experimental canine model, and hopefully, this unique hemodynamics could provide a new approach for treating myocardial microcirculation dysfunction.
分 类 号:R54[医药卫生—心血管疾病]
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