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Transesophageal echocardiography to assess the hemodynamic changes during cardiopulmonary resuscitation

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Author:
No author available
Journal Title:
JOURNAL OF EMERGENCY MEDICINE
Issue:
6
DOI:
10.3760/j.issn:1671-0282.2002.06.003
Key Word:
心搏骤停;心肺复苏;食道超声;血流动力学;心泵学说

Abstract: 目的探讨心肺复苏时胸外心脏按压的血流动力学机制.方法 6例心搏骤停患者均为2000~2001年心内科患者,男性5例,女性1例.在心肺复苏胸外按压时用变频多平面食道超声及彩色多普勒观察心脏改变.结果所有6例病人,在胸外按压阶段,二尖瓣关闭,主动脉瓣开放.主动脉瓣峰值血流速度为(59.0±13.0)cm/s.在放松阶段,二尖瓣开放,主动脉瓣关闭,二尖瓣峰值血流速度平均为(60.0±20.0)cm/s.在按压末左室内径明显减小为(32.1±7.1)mm,放松末增大为(42.1±12.9)mm(P<0.05).按压末左室容积为(39.0±8.9)ml,放松末(68.8±21.7)ml(P<0.05).按压频率为100次/min,心排血量为(2.8±0.8)L/min.按压时有创血压为60~80/10~30mmHg,指端血氧饱和度可达98%~99%.结论在实行心肺复苏胸外心脏按压的过程中,食道超声可清楚地显示二尖瓣关闭、主动脉瓣开放,左室容积减小,产生前向血流,支持心泵机制.

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