论文部分内容阅读
目的评价多普勒组织成像(DTI)法测量脉搏波速的真实性和可行性。方法行冠脉造影患者50例,测量主动脉两定点距离L,并与体表不同标志做相关性分析。测量脉搏波传递时间(PWT1),脉搏波速(PWV1)=L/PWT1,此40例患者行DTI法测量电-机械时间(EMT)、左室射血前期(PEP)、脉搏波传递时间(PWT2),PWT2=EMT-PEP,PWV2=L/PWT2,两种方法测得PWT1与PWT2,PWV1与PWV2分别行直线相关分析;上述主动脉两定点距离与体表长度间行相关性分析。结果PWT1为(24±9)ms,PWT2为(24±9)ms,二者之间无显著差异,具有显著相关性(r=0.91,P<0.01)。PWV1为(14±5)m/s,PWV2为(14±5)m/s,二者之间无明显差异,亦具有高度相关性(r=0.92,P<0.01),上述主动脉两定点距离与胸骨角至胸骨体下缘长度2倍加1cm的相关系数为0.90,而且这两组数据间无显著性差异。结论DTI法可做为无创测量PWT方法,选用胸骨角至胸骨体下缘长度2倍加1cm做为主动脉段长度估计值测得的PWV值是准确可用的。
Objective To evaluate the accuracy and feasibility of measuring pulse wave velocity by Doppler tissue imaging (DTI). Methods Fifty patients underwent coronary angiography, measuring the distance between two fixed points of the aorta and making correlation analysis with different signs of the body surface. Pulse wave transit time (PWT1) and pulse wave velocity (PWV1) were measured. The 40 patients underwent DTI to measure electromechanical time (EMT), preemptive ejection time (PEP), pulse wave transit time PWT2 = EMT-PEP and PWV2 = L / PWT2. PWT1 and PWT2 were measured by PWT2 and PWV2 respectively. Linear correlation analysis was performed between PWV1 and PWV2. Results PWT1 was (24 ± 9) ms and PWT2 was (24 ± 9) ms. There was no significant difference between them (r = 0.91, P <0.01). The PWV1 was (14 ± 5) m / s and PWV2 was (14 ± 5) m / s respectively. There was no significant difference between them (r = 0.92, P <0.01) A correlation coefficient of 0.90 between distance from the sternum to the lower edge of the sternum with a 2-fold plus 1 cm length was not significantly different between the two groups. Conclusion The DTI method can be used as a noninvasive measurement PWT method. The value of PWV measured from the sternum to the lower edge of the sternum with 2 times plus 1 cm as the estimation of the length of the aortic segment is accurate and available.