Comparison of Carotid Blood Flow Measured by Ultrasound and Cardiac Output in Patients Undergoing Cardiac Surgery.

IF 0.7 4区 医学 Q4 CARDIAC & CARDIOVASCULAR SYSTEMS Heart Surgery Forum Pub Date : 2023-05-31 DOI:10.1532/hsf.5465
Xin-Yi Bu, Jian-Kai Wang, Yong Zhang, Li-Hai Chen, Jia-Cong Liu, Ya-Mai Zhao, Hong-Wei Shi, Ya-Li Ge
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Abstract

Background: In general, cerebral blood flow accounts for 10-15% of cardiac output (CO), of which about 75% is delivered through the carotid arteries. Hence, if carotid blood flow (CBF) is constantly proportional to CO with high reproducibility and reliability, it would be of great value to measure CBF as an alternative to CO. The aim of this study was to investigate the direct correlation between CBF and CO. We hypothesized that measurement of CBF could be a good substitute for CO, even under more extreme hemodynamic conditions, for a wider range of critically ill patients.

Methods: Patients aged 65-80 years, undergoing elective cardiac surgery were included in this study. CBF in different cardiac cycles were measured by ultrasound: systolic carotid blood flow (SCF), diastolic carotid blood flow (DCF), and total (systolic and diastolic) carotid blood flow (TCF). CO simultaneously was measured by transesophageal echocardiography.

Results: For all patients, the correlation coefficients between SCF and CO, TCF and CO were 0.45 and 0.30, respectively, which were statistically significant, but not between DCF and CO. There was no significant correlation between either SCF, TCF or DCF and CO, when CO was <3.5 L/min.

Conclusions: Systolic carotid blood flow may be used as a better index to replace CO. However, the method of direct measurement of CO is essential when the patient's heart function is poor.

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心脏手术患者超声测量颈动脉血流量和心输出量的比较。
背景:一般情况下,脑血流量占心输出量(CO)的10-15%,其中约75%通过颈动脉输送。因此,如果颈动脉血流量(CBF)一直与CO成正比,并且具有高重现性和可靠性,那么测量CBF作为CO的替代品将具有重要价值。本研究的目的是研究CBF和CO之间的直接相关性。我们假设,即使在更极端的血流动力学条件下,CBF的测量也可以很好地替代CO,适用于更大范围的危重患者。方法:年龄65 ~ 80岁的择期心脏手术患者纳入本研究。超声测量不同心脏周期的脑血流:收缩期颈动脉血流量(SCF)、舒张期颈动脉血流量(DCF)和总(收缩期和舒张期)颈动脉血流(TCF)。同时经食管超声心动图测定CO。结果:所有患者SCF与CO、TCF与CO的相关系数分别为0.45、0.30,均有统计学意义,DCF与CO的相关系数无统计学意义。SCF、TCF、DCF与CO均无统计学意义,CO为。结论:收缩期颈动脉血流量可作为替代CO的较好指标,但当患者心功能较差时,直接测量CO的方法是必要的。
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来源期刊
Heart Surgery Forum
Heart Surgery Forum 医学-外科
CiteScore
1.20
自引率
16.70%
发文量
130
审稿时长
6-12 weeks
期刊介绍: The Heart Surgery Forum® is an international peer-reviewed, open access journal seeking original investigative and clinical work on any subject germane to the science or practice of modern cardiac care. The HSF publishes original scientific reports, collective reviews, case reports, editorials, and letters to the editor. New manuscripts are reviewed by reviewers for originality, content, relevancy and adherence to scientific principles in a double-blind process. The HSF features a streamlined submission and peer review process with an anticipated completion time of 30 to 60 days from the date of receipt of the original manuscript. Authors are encouraged to submit full color images and video that will be included in the web version of the journal at no charge.
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