Prediction of extravascular burden of carbon monoxide (CO) in the human heart.

Prediction of extravascular burden of carbon monoxide (CO) in the human heart.
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预测人类心脏中一氧化碳 (CO) 的血管外负荷。

DOI:
10.1007/s10439-009-9814-y
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发表时间:
2010
影响因子:
3.8
通讯作者:
Bruce,MargaretC
Bruce,MargaretC
中科院分区:
工程技术2区
文献类型:
--
作者:
Erupaka,Kinnera;Bruce,EugeneN;Bruce,MargaretC

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轻度至重度一氧化碳 (CO) 中毒患者会出现临床上显着的心肌异常(例如心律失常、S-T 升高)。我们增强了之前的全身模型 [Bruce、E.N.、M.C. Bruce 和 K. Erupaka。血管外组织从血液中吸收一氧化碳的速率的预测。呼吸。生理学。 Neurobiol.161(2):142–159, 2008]通过添加一个心脏室(包含三个血管和两个毛细血管密度不同的组织子室)来预测静息和运动期间几种 CO 暴露方案的心肌碳氧肌红蛋白 (MbCO) 和氧张力 (PcO2)。模型预测通过常氧、缺氧和高氧条件下的实验数据进行了验证。我们模拟了静息时暴露于 6462 ppm CO(10 分钟)和 265 ppm CO(480 分钟)的情况,以及在 20% HbCO 的三个级别的运动期间的暴露情况。我们比较了碳氧血红蛋白 (HbCO)、MbCO 和 PcO2 的反应,以估计 CO 缺氧导致心肌损伤的可能性。模拟结果预测,在 CO 暴露和随后的治疗期间,心脏组织比骨骼肌具有更高的 MbCO 水平和更低的 PcO2 水平。运动期间接触 CO 会进一步降低静息水平的 PcO2。我们的结论是,在休息和适度运动时,在 CO 暴露和冲洗过程中,心肌比骨骼肌面临更大的缺氧损伤风险。由于该模型可以预测人体心肌中 CO 的吸收和分布,因此它可以成为估计缺氧心肌损伤的可能性并促进治疗干预的工具。
Clinically significant myocardial abnormalities (e.g., arrhythmias, S-T elevation) occur in patients with mild-to-severe carbon monoxide (CO) poisoning. We enhanced our previous whole body model [Bruce, E. N., M. C. Bruce, and K. Erupaka. Prediction of the rate of uptake of carbon monoxide from blood by extravascular tissues.Respir. Physiol. Neurobiol.161(2):142–159, 2008] by adding a cardiac compartment (containing three vascular and two tissue subcompartments differing in capillary density) to predict myocardial carboxymyoglobin (MbCO) and oxygen tensions (PcO2) for several CO exposure regimens at rest and during exercise. Model predictions were validated with experimental data in normoxia, hypoxia, and hyperoxia. We simulated exposure at rest to 6462 ppm CO (10 min) and to 265 ppm CO (480 min), and during three levels of exercise at 20% HbCO. We compared responses of carboxyhemoglobin (HbCO), MbCO and PcO2to estimate the potential for myocardial injury due to CO hypoxia. Simulation results predict that during CO exposures and subsequent therapies, cardiac tissue has higher MbCO levels and lower PcO2’s than skeletal muscle. CO exposure during exercise further decreases PcO2from resting levels. We conclude that in rest and moderate exercise, the myocardium is at greater risk for hypoxic injury than skeletal muscle during the course of CO exposure and washout. Because the model can predict CO uptake and distribution in human myocardium, it could be a tool to estimate the potential for hypoxic myocardial injury and facilitate therapeutic intervention.
DOI: 10.1007/bf00584292
发表时间: 1975
期刊: Pflügers Archiv
影响因子: --
作者:
B. Lösse;S. Schuchhardt;N. Niederle
通讯作者: N. Niederle
DOI: 10.1152/japplphysiol.00217.2003
发表时间: 2003-09-01
影响因子: 3.3
作者:
Bruce, EN;Bruce, MC
通讯作者: Bruce, MC
DOI: 10.1042/cs0840559
发表时间: 1993-05-01
期刊: CLINICAL SCIENCE
影响因子: 6
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ELIA, M;KURPAD, A
通讯作者: KURPAD, A
DOI: 10.1023/a:1006268405585
发表时间: 1999-10-01
期刊: INTERNATIONAL JOURNAL OF CARDIAC IMAGING
影响因子: --
作者:
Marcus, JT;DeWaal, LK;Rossum, ACV
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静息骨骼肌的血容量和血液传输时间存在区域差异。
DOI: 10.2170/jjphysiol.53.467
发表时间: 2003
期刊: The Japanese journal of physiology
影响因子: --
作者:
M. Mizuno;Y. Kimura;T. Iwakawa;K. Oda;K. Ishii;K. Ishiwata;Yoshio Nakamura;I. Muraoka
通讯作者: I. Muraoka